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.

Solutions: Lace bugs can be controlled in various ways. For severe cases: Introduce beneficial insects that eat lace bugs, such as parasitoid wasps, assassin bugs, and lady beetles. Avoid spraying unnecessary pesticides so as not to reduce the populations of these helpful predators. Spray plants with insecticidal soap or neem oil under all leaves of the affected and surrounding plants. Make sure the soap hits the insects. Spray in the morning, evening, or on a cloudy day to avoid damaging plant tissue. Trim and burn heavily infected plant limbs. As a last resort use an insecticide containing pyrethroids to kill the lace bugs. Remember that these products will also likely kill beneficial insects such as bees. For less severe cases: Rub off lace bugs from under the leaves using a damp cloth. Use the strong stream of a hose to spray these pests off plants. This washes the nymphs off and onto the ground where they cannot return to the leaves of the plant. Large trees generally do not need to be treated for lace bugs, since they don't damage their overall health.

Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.

Solutions: The first step in treating the plant is to eradicate the insects that secrete the honeydew substance. Visually inspect the plant for insects, making sure to look on the underside of leaves and in the crotch of branches. Insects that may be present are as follows: Aphids are minuscule pear-shaped bugs. Most are green in color. Whiteflies are pale in color, almost translucent, and are covered with a powdery whitish wax. They may look like tiny white moths. Scale appears as small brown bumps attached to the leaves and branches, with either a soft or armored coating. Mealybugs are small white insects that look like cotton wool. To treat insect infestation, follow these steps: Handpick insects off if the infestation is minor. Wipe plant leaves gently with a clean, damp cloth or spray with a jet of water from the hose to dislodge them. Treat with insecticidal soap or neem oil for serious infestations. The fatty acids in insecticidal soaps suffocate small-bodied insects. Neem oil is a common botanical pesticide that blocks the hormones that transition insects from larva to pupa to adult, halting the insect’s life cycle. Once the insect infestation has been treated, remove as much mold from the leaves as possible. The remaining mold will dry out due to the lack of honeydew and will fall off the plant. Wash with insecticidal or very dilute dishwashing soap. Apply a couple of hours before rain is predicted, if possible. The soap will help soften the soot, making it easier to rinse it away. Spray plants with a steady stream of water.