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Esparto
Esparto
Esparto
Stipa tenacissima
Also known as : Esparto grass
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Care Guide for Esparto

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Soil Care
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Sand, Loam, Clay, Chalky, Acidic
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Questions About Esparto

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Fertilizing Fertilizing Fertilizing
What should I do if I water my Esparto too much or too little?
Without proper watering, this beautiful ornamental grass will underperform. In the ground, watering issues can be solved, but In a container, too much or too little water will kill Esparto in short order. When Esparto isn't receiving the right amount of water, it may stop growing. In the case of overwatering, it will begin to display yellow leaves with brown tips. Underwatering can produce drooping leaves, weak seed head production, and browned leaves. If you suspect your Esparto has been improperly watered, the first thing to do is figure out if the problem is too much or too little. If your Esparto is getting too much water, stop watering it immediately. Sometimes it can take weeks for heavy soils to dry out, so be patient. At the first sign of new growth, test the soil for moisture and decide whether it needs more water or not. The solution for Esparto receiving too little water is even simpler: give the grasses a nice, deep drink and see if it perks up. Bearing all of this in mind, remember that a long, deep watering is always better than a lot of shallow, frequent waterings. The reason for this is that deep watering encourages grasses to grow deep roots, which makes them more drought resistant and less prone to problems from watering.
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How often should I water my Esparto?
The watering needs of Esparto will vary depending on where it is planted. Generally, you should water this grass every week. In hot climates, once or twice a week watering in the summer may be necessary. In moderate climates, watering once every seven days or more may be enough. Grass in containers almost always need more frequent watering than grasses in the ground. But with a species such as this that can thrive in full sun or part shade, the location also matters. Shaded grasses need to be watered less frequently than in-ground grasses. Esparto should only be watered when the soil is dry. If you’re unsure when to water, there are a few key signs you can use as your cue. Pressing your finger a couple of inches into the soil will tell you if the soil is dry. For a potted grass, you can weigh the grass with a portable scale to see how light it is, but you can also quickly feel when the pot is light from lack of water. Like many types of grass, the blades may appear folded along their centers and thinner than usual when the roots lack sufficient water. Despite its drought tolerance, regular, deep waterings will reward you with a beautiful color. In the wild, Esparto grows in open scrubland, where it would be subject to extreme heat, loads of bright sun, and intermittent rain. Because this grass is drought resistant, you might expect never to need to water it. But don’t let its hardiness fool you, Esparto still needs care and attention. Even though this hardy grass can handle harsh, dry conditions, gardeners agree that it thrives best with consistent water. When first planted, Esparto will need more frequent water until it has established deep roots. For Esparto in pots, the soil will dry out quickly, especially if the pot is in hot, direct sun for a large part of the day. Test the soil every 3 to 4 days and water only when it feels dry. Espartoed in the ground generally needs less watering, but that depends on the soil it is grown in. Heavy clay soil holds water for a long time and may feel dry at the surface while still retaining plenty of moisture below the ground. Sandy soils that drain quickly will need to be watered more often.
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What should I be careful with when I water my Esparto in different seasons, climates, or during different growing?
You can often tell if you are watering enough by the rate of growth of your grasses. Esparto during the hottest months of the year and has been known to double in size in a year’s time. If the weather is hot and the grass is not growing vigorously, you may need to adjust your watering schedule. In winter, you might be able to get away with watering only once a month, but you will still want to touch the soil to test for moisture. During a growth cycle (in the warmest months), the grass will need more water than usual. But during winter and cooler months, the need for water will be dramatically reduced. The most important thing to remember about Esparto is that the soil it is planted in should always be allowed to dry out completely before adding water.
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Key Facts About Esparto

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Attributes of Esparto

Lifespan
Perennial
Plant Type
Grass
Bloom Time
Summer, Fall, Winter
Plant Height
1.2 m to 1.8 m
Spread
30 cm to 60 cm
Leaf Color
Green
Gray
Silver
Flower Size
2.5 cm to 8 cm
Flower Color
White
Green
Cream
Brown
Silver
Leaf type
Evergreen
Growth Season
Summer, Fall, Winter

Scientific Classification of Esparto

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Common Pests & Diseases About Esparto

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Common issues for Esparto based on 10 million real cases
Underwatering
Underwatering Underwatering
Underwatering
Leaves may wilt for a variety of reasons.
Solutions: The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with. Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock. In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.
Leaf scorch
Leaf scorch Leaf scorch
Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Solutions: The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms. Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves. Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement. Protect trees from severe root damage of nearby construction and excavation. If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. However, keep in mind that fertilizer runoff is an environmental pollutant. Avoiding excess fertilization in the first place is the best approach. If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry. Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections. If your plant has bacterial leaf scorch, there is no cure. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. An infected plant will likely die within ten years.
Longhorn beetles
Longhorn beetles Longhorn beetles
Longhorn beetles
The longhorn beetle is a medium- to large-sized insect with very long antennae and strong jaws. Both its adult and larval stages gnaw on tree trunks, leaving small, round holes.
Solutions: Some longhorn beetles species are native insects, and they cause little damage. Therefore, these don't warrant control. Other longhorn beetles species are invasive pests that were recently introduced from other areas. These species can cause a great deal of damage to hardwood trees. Apply an insecticide containing imidacloprid as a soil injection or trunk injection following product instructions. This will enter into new grow and kill adults who feed on foliage. This will not help save trees that are already infested with large amounts of larvae, but it will save trees located near an infested tree. Contact an arborist for best control practices regarding infected trees. To properly control longhorn beetles, all host plants in a given area must be treated. Contact a local extension agent or state agency. Tracking the spread of longhorn beetles is a key component of their control.
Crown gall
Crown gall Crown gall
Crown gall
Bacterial infections can cause abnormal brown or black growths on the trunk of the tree. These are also called crown galls.
Solutions: Remove infected tissue. Established trees can survive a crown gall infection, but the galls should be removed to improve the plant's appearance. Use pruning shears to remove the gall, then treat the wound with a pruning sealer. Discard pruned material by putting it in the trash or burning it to avoid infecting other plants. Sterilize the pruning shears after removing the galls. Remove the entire plant. If a small plant is infected with a serious case of crown gall, the best option is to remove the entire plant and burn it. This will prevent bacteria from spreading to other plants. Sterilize the soil. After removing infected tissue, sterilize the soil using heat. Alternatively, plant a gall-resistant plant in the same spot.
Fruit rot
Fruit rot Fruit rot
Fruit rot
Soft rot in the fruit can have a variety of causes.
Solutions: Prune out and destroy infected spurs and branches. Correct spacing between plants to reduce wind-born infection. Chemical fungicides may become necessary. Bird deterrents and biological or chemical treatments for insects will reduce fruit damage, making it harder for fungal infections to take hold.
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Underwatering
plant poor
Underwatering
Leaves may wilt for a variety of reasons.
Overview
Overview
Underwatering plants is one of the quickest ways to kill them. This is something that most gardeners are well aware of. Unfortunately, knowing exactly how much water a plant needs can be tricky, especially considering that underwatering and overwatering present similar symptoms in plants.
Therefore, it’s important to be vigilant and attentive to each plants’ individual needs.
Symptom Analysis
Symptom Analysis
As mentioned earlier, overwatering and underwatering present similar symptoms in plants. These symptoms include poor growth, wilted leaves, defoliation, and brown leaf tips or margins. Ultimately, both underwatering and overwatering can lead to the death of a plant.
The easiest way to determine whether a plant has too much water or too little is to look at the leaves. If underwatering is the culprit, the leaves will look brown and crunchy, while if it’s overwatering, they will appear yellow or a pale green in color.
When this issue first begins, there may be no noticeable symptoms at all, particularly in hardy or drought-tolerant plants. However, they will begin to wilt once they start suffering from a lack of water. The edges of the plant’s leaves will become brown or curled. Soil pulling away from the edges of the planter is a telltale sign, or a crispy, brittle stem.
Prolonged underwatering can cause a plant’s growth to become stunted. The leaves might drop and the plant can be more susceptible to pest infestations, too.
Disease Cause
Disease Cause
Underwatering is caused by, quite simply, not watering plants often or deeply enough. There is a heightened risk of underwatering if any of these situations apply:
  • Extreme heat and dry weather (when growing outdoors)
  • Grow lights or indoor lighting that is too bright or intense for the type of plant
  • Using fast-draining growing media such as sand
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Leaf scorch
plant poor
Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Overview
Overview
Leaf scorch refers to two general conditions: physiological leaf scorch and bacterial leaf scorch. It causes leaves to discolor starting along the margins, and eventually die.
Leaf scorch development is most common in the hot, dry season, becoming most noticeable in late summer. However, it can occur at other times of the year. It most often affects young trees and shrubs, but it can also affect flowers, vegetables, and other plants.
Leaf scorch can get progressively worse over multiple seasons. If the root causes are not addressed, leaf scorch can lead to plant death.
While you cannot reverse the damage caused by physiological leaf scorch, you can prevent further damage. With proper management, plants will fully recover. However, there is no cure for bacterial leaf scorch, which is a systemic infection.
Symptom Analysis
Symptom Analysis
  • Yellow, brown, or blackened leaves starting with the leaf margins
  • Dying twig tips on trees and shrubs as leaves die and fall
  • Often there is a bright yellow border line between the dead and living leaf tissue
Disease Cause
Disease Cause
There are numerous contributing causes of leaf scorch.
Bacterial leaf scorch is caused by the bacterium Xylella fastidiosa. The bacteria block the xylem vessels, preventing water movement. Symptoms may vary across species.
Physiological leaf scorch most commonly occurs when a plant cannot take up enough water. Numerous conditions can lead to this issue, particularly an unhealthy root system. Some causes of an unhealthy root system include overly-compacted soil, recent tillage, root compaction and severing due to pavement or other construction, drought, and overly-saturated soils.
Potassium deficiency can contribute to leaf scorch. Since plants need potassium to move water, they cannot properly move water when there is a lack of potassium.
Too much fertilizer can also cause leaf scorch symptoms. The accumulation of salts (including nutrient salts from fertilizers, as well as salt water) accumulate at the leaf margins and may build up to concentrations that burn the tissues.
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Longhorn beetles
plant poor
Longhorn beetles
The longhorn beetle is a medium- to large-sized insect with very long antennae and strong jaws. Both its adult and larval stages gnaw on tree trunks, leaving small, round holes.
Overview
Overview
Longhorn beetles are characterized by extremely long antennae which are often as long as, or longer, than the beetle's body. Adult longhorn beetles vary in size, shape, and coloration, depending upon the species. They may be 6 to 76 mm long. The larvae are worm-like with a wrinkled, white to yellowish body and a brown head.
Longhorn beetles are active throughout the year, but adults are most active in the summer and fall. Larvae feed on wood throughout the year.
Both larvae and adults feed on woody tissue. Some of the most susceptible species include ash, birch, elm, poplar, and willow.
If left untreated, longhorn beetles can kill trees.
Symptom Analysis
Symptom Analysis
Longhorn beetles are attracted to wounded, dying, or freshly-cut hardwood trees. Adults lay their eggs in the spring, summer, and fall on the bark of greenwood. There may be sap around egg-laying sites.
Once the eggs hatch, larvae called round-headed borers burrow into the trunk to feed. They may tunnel for one to three years depending on the wood's nutritional content. As the larvae feed, they release sawdust-like frass at the base of the tree.
Eventually, the larvae turn into pupae and then adults. When the adults emerge, they leave 1 cm holes in the bark on their way out. Adults feed on leaves, bark, and shoots of trees before laying eggs.
After a few years of being fed upon by longhorn beetles, a tree will begin losing leaves. Eventually, it will die.
Solutions
Solutions
Some longhorn beetles species are native insects, and they cause little damage. Therefore, these don't warrant control.
Other longhorn beetles species are invasive pests that were recently introduced from other areas. These species can cause a great deal of damage to hardwood trees.
  • Apply an insecticide containing imidacloprid as a soil injection or trunk injection following product instructions. This will enter into new grow and kill adults who feed on foliage. This will not help save trees that are already infested with large amounts of larvae, but it will save trees located near an infested tree.
  • Contact an arborist for best control practices regarding infected trees.
  • To properly control longhorn beetles, all host plants in a given area must be treated.
  • Contact a local extension agent or state agency. Tracking the spread of longhorn beetles is a key component of their control.
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Crown gall
plant poor
Crown gall
Bacterial infections can cause abnormal brown or black growths on the trunk of the tree. These are also called crown galls.
Overview
Overview
Crown gall is a bacterial disease that affects many different species of shrubs. It produces unsightly growths called galls on stems, branches, and roots. These galls stunt the growth of plants and weaken them. This is because they disrupt the flow of water and nutrients from the roots up to other areas of the plant.
Crown gall growth is generally more rapid during warm weather. There are no chemical solutions available that will kill this disease. The presence of galls does not usually cause the death of a plant, however. These galls can easily be spread to other plants through contaminated tools or soil.
Symptom Analysis
Symptom Analysis
Crown gall is most often seen on lower branches. This disease appears as deformed growths on stems, branches, or roots that gradually enlarge over time.
As the galls enlarge, they become hard and woody. Their appearance is usually brown and corky. The plant will show symptoms of stunted growth and there may be evidence of tip dieback.
Disease Cause
Disease Cause
Crown gall is caused by the bacteria Agrobacterium tumefaciens. This bacteria lives in the soil, and can survive there for many years. It is spread onto the plant by water splashing up from contaminated soil. Infected pruning tools can also spread the disease onto plants.
The bacteria enter the plant through open wounds. These could be caused by chewing insects or damage from gardening tools such as lawnmowers. Pruning cuts that have not been treated can also be infected by this bacterial disease.
Once the bacteria have entered the plant, they stimulate rapid growth in plant cells, and this is what causes the abnormal growths.
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Fruit rot
plant poor
Fruit rot
Soft rot in the fruit can have a variety of causes.
Overview
Overview
Fruit rot is quite common, and there are a large number of factors that can lie at the heart of this problem. Symptoms also vary from fruit to fruit and from cause to cause, but in general, one can recognize fruit that is rotten or starting to rot. Many of the most common causes of rotting are related to fungal diseases, which enter the fruit through wounds such as those caused by birds. The disease then spreads outwards from the wound. From there it can spread to neighboring fruit or be carried by the wind to plants further away.
Symptom Analysis
Symptom Analysis
Below are some of the broader symptoms to look out for in cases of fruit rot. If this occurs on just one or two fruit it may just be as the result of a small-scale infection, but if it is widespread then a fungal infection problem is likely.
  1. Small brown spots appear on the fruit.
  2. Brown spots expand, normally in concentric circles and the center starts to go soft and mushy.
  3. Mushiness spreads and grey or brown powdery pustules start to coat the fruit.
  4. Some fruit will drop but others may remain and gradually turn mummified.
Disease Cause
Disease Cause
Fruit rot is often caused by fungal infection. These fungi overwinter on fallen fruit, and then the spores are spread by the wind the following spring. Birds and sap-sucking insects can also act as vectors. Entry to new fruit is made considerably easier if there are wounds of any kind through which the spores can penetrate the skin. The healthier the tree or plant, the better able it is to defend itself from infection.
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Plants Related to Esparto

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Parasol leaf tree
Parasol leaf tree
The parasol leaf tree (Macaranga tanarius) is found in Asia and Australia in disturbed rainforest, where it grows as a pioneer species. It is grown as an ornamental tree, as well as in bush regeneration.
Snake jasmine
Snake jasmine
Snake jasmine (Rhinacanthus nasutus) can be found almost exclusively in the tropical regions of Asia. Most populations of the plant produce flowers all year long. In Madagascar, where snake jasmine has been introduced, the flowers are used to give clothing a pleasant scent.
Spiral ginger
Spiral ginger
Costus spiralis is a plant species native to Asia, Africa, and the Americas. Costus spiralis is also known as spiral ginger and grows best in full sun to partial shade. Costus spiralis attracts bees and butterflies.
African sumac
African sumac
Searsia lancea is a highly drought tolerant shade tree native to Africa. It can withstand hot and cold temperatures and will tolerate heavy pruning. This evergreen tree can be planted as a windshield or hedge.
Bandicoot berry
Bandicoot berry
Bandicoot berry (Leea indica) is a large shrub or small tree that's grown ornamentally for its unusual green-white flowers which attract butterflies and other pollinating insects. It is also harvested and used as green manure within its native region. Its purplish-black fruit is eaten by various birds, but most commonly by bulbuls.
Whitetip nightshade
Whitetip nightshade
Whitetip nightshade (Solanum chenopodioides), a native of Argentina, was spread around the globe in agricultural produce and has become naturalized in North America, Europe, Australia, and New Zealand. It can be confused with the more common Black Nightshade, but it requires a moister habitat, it has narrower petals, and the underside of the leaves is pale and hairy.
Cape jasmine
Cape jasmine
Gardenia jasminoides is an evergreen shrub with unique, glossy evergreen leaves and stunning flowers. The sophisticated, matte white flowers are often used in bouquets. The exceptional beauty of this ornamental plant has made it a popular and highly appreciated plant amongst gardeners and horticulturalists.
Golden pothos
Golden pothos
The golden pothos (Epipremnum aureum) is a popular houseplant that is commonly seen in Australia, Asia, and the West Indies. It goes by many nicknames, including "devil's ivy", because it is so hard to kill and can even grow in low light conditions. Golden pothos has poisonous sap, so it should be kept away from pets and children.
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Esparto
Esparto
Esparto
Stipa tenacissima
Also known as: Esparto grass
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Care Guide for Esparto

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Questions About Esparto

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Watering Watering Watering
Pruning Pruning Pruning
Sunlight Sunlight Sunlight
Fertilizing Fertilizing Fertilizing
What should I do if I water my Esparto too much or too little?
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How often should I water my Esparto?
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What should I be careful with when I water my Esparto in different seasons, climates, or during different growing?
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Key Facts About Esparto

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Attributes of Esparto

Lifespan
Perennial
Plant Type
Grass
Bloom Time
Summer, Fall, Winter
Plant Height
1.2 m to 1.8 m
Spread
30 cm to 60 cm
Leaf Color
Green
Gray
Silver
Flower Size
2.5 cm to 8 cm
Flower Color
White
Green
Cream
Brown
Silver
Leaf type
Evergreen
Growth Season
Summer, Fall, Winter
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Scientific Classification of Esparto

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Common Pests & Diseases About Esparto

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Common issues for Esparto based on 10 million real cases
Underwatering
Underwatering Underwatering Underwatering
Leaves may wilt for a variety of reasons.
Solutions: The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with. Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock. In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.
Learn More About the Underwatering more
Leaf scorch
Leaf scorch Leaf scorch Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Solutions: The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms. Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves. Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement. Protect trees from severe root damage of nearby construction and excavation. If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. However, keep in mind that fertilizer runoff is an environmental pollutant. Avoiding excess fertilization in the first place is the best approach. If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry. Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections. If your plant has bacterial leaf scorch, there is no cure. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. An infected plant will likely die within ten years.
Learn More About the Leaf scorch more
Longhorn beetles
Longhorn beetles Longhorn beetles Longhorn beetles
The longhorn beetle is a medium- to large-sized insect with very long antennae and strong jaws. Both its adult and larval stages gnaw on tree trunks, leaving small, round holes.
Solutions: Some longhorn beetles species are native insects, and they cause little damage. Therefore, these don't warrant control. Other longhorn beetles species are invasive pests that were recently introduced from other areas. These species can cause a great deal of damage to hardwood trees. Apply an insecticide containing imidacloprid as a soil injection or trunk injection following product instructions. This will enter into new grow and kill adults who feed on foliage. This will not help save trees that are already infested with large amounts of larvae, but it will save trees located near an infested tree. Contact an arborist for best control practices regarding infected trees. To properly control longhorn beetles, all host plants in a given area must be treated. Contact a local extension agent or state agency. Tracking the spread of longhorn beetles is a key component of their control.
Learn More About the Longhorn beetles more
Crown gall
Crown gall Crown gall Crown gall
Bacterial infections can cause abnormal brown or black growths on the trunk of the tree. These are also called crown galls.
Solutions: Remove infected tissue. Established trees can survive a crown gall infection, but the galls should be removed to improve the plant's appearance. Use pruning shears to remove the gall, then treat the wound with a pruning sealer. Discard pruned material by putting it in the trash or burning it to avoid infecting other plants. Sterilize the pruning shears after removing the galls. Remove the entire plant. If a small plant is infected with a serious case of crown gall, the best option is to remove the entire plant and burn it. This will prevent bacteria from spreading to other plants. Sterilize the soil. After removing infected tissue, sterilize the soil using heat. Alternatively, plant a gall-resistant plant in the same spot.
Learn More About the Crown gall more
Fruit rot
Fruit rot Fruit rot Fruit rot
Soft rot in the fruit can have a variety of causes.
Solutions: Prune out and destroy infected spurs and branches. Correct spacing between plants to reduce wind-born infection. Chemical fungicides may become necessary. Bird deterrents and biological or chemical treatments for insects will reduce fruit damage, making it harder for fungal infections to take hold.
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Underwatering
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Underwatering
Leaves may wilt for a variety of reasons.
Overview
Overview
Underwatering plants is one of the quickest ways to kill them. This is something that most gardeners are well aware of. Unfortunately, knowing exactly how much water a plant needs can be tricky, especially considering that underwatering and overwatering present similar symptoms in plants.
Therefore, it’s important to be vigilant and attentive to each plants’ individual needs.
Symptom Analysis
Symptom Analysis
As mentioned earlier, overwatering and underwatering present similar symptoms in plants. These symptoms include poor growth, wilted leaves, defoliation, and brown leaf tips or margins. Ultimately, both underwatering and overwatering can lead to the death of a plant.
The easiest way to determine whether a plant has too much water or too little is to look at the leaves. If underwatering is the culprit, the leaves will look brown and crunchy, while if it’s overwatering, they will appear yellow or a pale green in color.
When this issue first begins, there may be no noticeable symptoms at all, particularly in hardy or drought-tolerant plants. However, they will begin to wilt once they start suffering from a lack of water. The edges of the plant’s leaves will become brown or curled. Soil pulling away from the edges of the planter is a telltale sign, or a crispy, brittle stem.
Prolonged underwatering can cause a plant’s growth to become stunted. The leaves might drop and the plant can be more susceptible to pest infestations, too.
Disease Cause
Disease Cause
Underwatering is caused by, quite simply, not watering plants often or deeply enough. There is a heightened risk of underwatering if any of these situations apply:
  • Extreme heat and dry weather (when growing outdoors)
  • Grow lights or indoor lighting that is too bright or intense for the type of plant
  • Using fast-draining growing media such as sand
Solutions
Solutions
The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with.
Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock.
In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.
Prevention
Prevention
Always check the soil before watering. If the top inch of soil feels moist, though not wet, the watering is perfect. If it’s dry, water it immediately. If it feels soggy, you avoid watering until it dries out a bit more.
Also, make sure the lighting is sufficient for the species. Plants grow faster and need more water when there is intense light or lots of heat. Being aware of these conditions and modifying them, if possible, is a good way to prevent underwatering. Many container plants are potted in soil mixtures mean to be well-draining. Adding materials that retain moisture, like compost or peat moss, can also prevent these symptoms.
Other tips to prevent underwatering include:
  • Choose pots with adequately-sized drainage holes
  • Avoid warm temperatures
  • Use large pots with additional soil (these take longer to dry out)
  • Avoid terracotta pots, which lose water quickly
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Leaf scorch
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Leaf scorch
Leaf blight causes leaves to dry out and turn brown starting at their tips.
Overview
Overview
Leaf scorch refers to two general conditions: physiological leaf scorch and bacterial leaf scorch. It causes leaves to discolor starting along the margins, and eventually die.
Leaf scorch development is most common in the hot, dry season, becoming most noticeable in late summer. However, it can occur at other times of the year. It most often affects young trees and shrubs, but it can also affect flowers, vegetables, and other plants.
Leaf scorch can get progressively worse over multiple seasons. If the root causes are not addressed, leaf scorch can lead to plant death.
While you cannot reverse the damage caused by physiological leaf scorch, you can prevent further damage. With proper management, plants will fully recover. However, there is no cure for bacterial leaf scorch, which is a systemic infection.
Symptom Analysis
Symptom Analysis
  • Yellow, brown, or blackened leaves starting with the leaf margins
  • Dying twig tips on trees and shrubs as leaves die and fall
  • Often there is a bright yellow border line between the dead and living leaf tissue
Disease Cause
Disease Cause
There are numerous contributing causes of leaf scorch.
Bacterial leaf scorch is caused by the bacterium Xylella fastidiosa. The bacteria block the xylem vessels, preventing water movement. Symptoms may vary across species.
Physiological leaf scorch most commonly occurs when a plant cannot take up enough water. Numerous conditions can lead to this issue, particularly an unhealthy root system. Some causes of an unhealthy root system include overly-compacted soil, recent tillage, root compaction and severing due to pavement or other construction, drought, and overly-saturated soils.
Potassium deficiency can contribute to leaf scorch. Since plants need potassium to move water, they cannot properly move water when there is a lack of potassium.
Too much fertilizer can also cause leaf scorch symptoms. The accumulation of salts (including nutrient salts from fertilizers, as well as salt water) accumulate at the leaf margins and may build up to concentrations that burn the tissues.
Solutions
Solutions
The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms.
  • Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves.
  • Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement.
  • Protect trees from severe root damage of nearby construction and excavation.
  • If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. However, keep in mind that fertilizer runoff is an environmental pollutant. Avoiding excess fertilization in the first place is the best approach.
  • If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry.
  • Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections.
  • If your plant has bacterial leaf scorch, there is no cure. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. An infected plant will likely die within ten years.
Prevention
Prevention
  • Physiological leaf scorch is best avoided by making sure your plants have a healthy, functional root system and access to enough water. Water regularly, especially on the mornings of excessively hot, sunny days. Deep, infrequent irrigation is better than shallow, frequent irrigation.
  • Have your soil tested and apply the proper nutrients. Be sure to not over-apply fertilizers.
  • Make sure your plants’ roots have room to expand. Avoid compacted soil as well and avoid paving areas above the root zone. Do not till or disturb the soil where plant roots are growing.
  • Plant new trees and shrubs in the fall, so that they have the maximum amount of time to become established before the environmental stresses of the next summer.
  • Remove any dead or dying plant tissue that may harbor secondary infections.
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Longhorn beetles
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Longhorn beetles
The longhorn beetle is a medium- to large-sized insect with very long antennae and strong jaws. Both its adult and larval stages gnaw on tree trunks, leaving small, round holes.
Overview
Overview
Longhorn beetles are characterized by extremely long antennae which are often as long as, or longer, than the beetle's body. Adult longhorn beetles vary in size, shape, and coloration, depending upon the species. They may be 6 to 76 mm long. The larvae are worm-like with a wrinkled, white to yellowish body and a brown head.
Longhorn beetles are active throughout the year, but adults are most active in the summer and fall. Larvae feed on wood throughout the year.
Both larvae and adults feed on woody tissue. Some of the most susceptible species include ash, birch, elm, poplar, and willow.
If left untreated, longhorn beetles can kill trees.
Symptom Analysis
Symptom Analysis
Longhorn beetles are attracted to wounded, dying, or freshly-cut hardwood trees. Adults lay their eggs in the spring, summer, and fall on the bark of greenwood. There may be sap around egg-laying sites.
Once the eggs hatch, larvae called round-headed borers burrow into the trunk to feed. They may tunnel for one to three years depending on the wood's nutritional content. As the larvae feed, they release sawdust-like frass at the base of the tree.
Eventually, the larvae turn into pupae and then adults. When the adults emerge, they leave 1 cm holes in the bark on their way out. Adults feed on leaves, bark, and shoots of trees before laying eggs.
After a few years of being fed upon by longhorn beetles, a tree will begin losing leaves. Eventually, it will die.
Solutions
Solutions
Some longhorn beetles species are native insects, and they cause little damage. Therefore, these don't warrant control.
Other longhorn beetles species are invasive pests that were recently introduced from other areas. These species can cause a great deal of damage to hardwood trees.
  • Apply an insecticide containing imidacloprid as a soil injection or trunk injection following product instructions. This will enter into new grow and kill adults who feed on foliage. This will not help save trees that are already infested with large amounts of larvae, but it will save trees located near an infested tree.
  • Contact an arborist for best control practices regarding infected trees.
  • To properly control longhorn beetles, all host plants in a given area must be treated.
  • Contact a local extension agent or state agency. Tracking the spread of longhorn beetles is a key component of their control.
Prevention
Prevention
  • Keeping trees healthy, uninjured, and unstressed will help prevent beetle infestation. Water trees appropriately, giving neither too much nor too little.
  • Check with local tree companies about which tree species have fewer problems.
  • Avoid moving firewood as this can introduce exotic longhorn beetles.
  • Routine spraying of persistent, broad-spectrum insecticides will help prevent re-infestation of previously affected trees or infestation of unaffected trees.
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Crown gall
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Crown gall
Bacterial infections can cause abnormal brown or black growths on the trunk of the tree. These are also called crown galls.
Overview
Overview
Crown gall is a bacterial disease that affects many different species of shrubs. It produces unsightly growths called galls on stems, branches, and roots. These galls stunt the growth of plants and weaken them. This is because they disrupt the flow of water and nutrients from the roots up to other areas of the plant.
Crown gall growth is generally more rapid during warm weather. There are no chemical solutions available that will kill this disease. The presence of galls does not usually cause the death of a plant, however. These galls can easily be spread to other plants through contaminated tools or soil.
Symptom Analysis
Symptom Analysis
Crown gall is most often seen on lower branches. This disease appears as deformed growths on stems, branches, or roots that gradually enlarge over time.
As the galls enlarge, they become hard and woody. Their appearance is usually brown and corky. The plant will show symptoms of stunted growth and there may be evidence of tip dieback.
Disease Cause
Disease Cause
Crown gall is caused by the bacteria Agrobacterium tumefaciens. This bacteria lives in the soil, and can survive there for many years. It is spread onto the plant by water splashing up from contaminated soil. Infected pruning tools can also spread the disease onto plants.
The bacteria enter the plant through open wounds. These could be caused by chewing insects or damage from gardening tools such as lawnmowers. Pruning cuts that have not been treated can also be infected by this bacterial disease.
Once the bacteria have entered the plant, they stimulate rapid growth in plant cells, and this is what causes the abnormal growths.
Solutions
Solutions
  1. Remove infected tissue. Established trees can survive a crown gall infection, but the galls should be removed to improve the plant's appearance. Use pruning shears to remove the gall, then treat the wound with a pruning sealer. Discard pruned material by putting it in the trash or burning it to avoid infecting other plants. Sterilize the pruning shears after removing the galls.
  2. Remove the entire plant. If a small plant is infected with a serious case of crown gall, the best option is to remove the entire plant and burn it. This will prevent bacteria from spreading to other plants.
  3. Sterilize the soil. After removing infected tissue, sterilize the soil using heat. Alternatively, plant a gall-resistant plant in the same spot.
Prevention
Prevention
To prevent crown gall, avoid introducing and spreading the bacteria that causes it.
  1. Avoid infected plants. Inspect all new plants for symptoms. Dispose of any plants that show signs of crown gall.
  2. Sanitize pruning tools. Use an approved sanitizing solution to treat pruning shears both before and after use. A freshly-mixed solution of 1 part bleach to 9 parts water will be most effective.
  3. Avoid mounding soil around the crown of the plant, keeping this area as dry as possible. Remove dead branches and leaves to prevent the occurrence of pests and diseases.
  4. Utilize beneficial bacteria. The beneficial bacterium Agrobacterium radiobacter strain 84 can be used during planting to prevent crown gall. To use, simply dip bare-rooted plants in the solution, or water rooted plants with a solution of the aforementioned bacteria.
  5. Correct overly alkaline soils. Crown gall-causing bacteria thrive in alkaline soils, so check the pH level of the soil and reduce the alkalinity.
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Fruit rot
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Fruit rot
Soft rot in the fruit can have a variety of causes.
Overview
Overview
Fruit rot is quite common, and there are a large number of factors that can lie at the heart of this problem. Symptoms also vary from fruit to fruit and from cause to cause, but in general, one can recognize fruit that is rotten or starting to rot. Many of the most common causes of rotting are related to fungal diseases, which enter the fruit through wounds such as those caused by birds. The disease then spreads outwards from the wound. From there it can spread to neighboring fruit or be carried by the wind to plants further away.
Symptom Analysis
Symptom Analysis
Below are some of the broader symptoms to look out for in cases of fruit rot. If this occurs on just one or two fruit it may just be as the result of a small-scale infection, but if it is widespread then a fungal infection problem is likely.
  1. Small brown spots appear on the fruit.
  2. Brown spots expand, normally in concentric circles and the center starts to go soft and mushy.
  3. Mushiness spreads and grey or brown powdery pustules start to coat the fruit.
  4. Some fruit will drop but others may remain and gradually turn mummified.
Disease Cause
Disease Cause
Fruit rot is often caused by fungal infection. These fungi overwinter on fallen fruit, and then the spores are spread by the wind the following spring. Birds and sap-sucking insects can also act as vectors. Entry to new fruit is made considerably easier if there are wounds of any kind through which the spores can penetrate the skin. The healthier the tree or plant, the better able it is to defend itself from infection.
Solutions
Solutions
  1. Prune out and destroy infected spurs and branches.
  2. Correct spacing between plants to reduce wind-born infection.
  3. Chemical fungicides may become necessary.
  4. Bird deterrents and biological or chemical treatments for insects will reduce fruit damage, making it harder for fungal infections to take hold.
Prevention
Prevention
To prevent pests and disease infection:
  1. Pick fruits on time. Remove fruit once ripe to prevent opportunities for pests and fungal infections to take hold.
  2. Rake and clean debris. Remove and bury surrounding plant material that may host diseases.
  3. Prune branches and thin fruit. Remove ripening fruits so they do not touch one another and prune branches to improve air circulation (reducing the wet conditions in which fungi thrive).
  4. Consider preventative use of fungicide prior to fruit forming.
To prevent nutrient deficiency that weakens the plant:
  1. Add mulch. Adding a layer of mulch on top of the soil early in the season will keep moisture even.
  2. Use organic fertilizer. Plants given ammonia-based fertilizer cannot uptake calcium efficiently. Use compost, fish emulsion, liquid kelp or other organic fertilizer.
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