Many tree problems are caused by insects and diseases. These problems can completely threaten the health, beauty and life of your trees. Here is a list of the top ten problems that can plague trees in the urban streetscape.
Lace Bug: Lace bugs target broad-leaf evergreens such as andromeda, azalea, and rhododendron. Early detection is the key to getting rid of an infestation. Look for yellow-silver stippling on the topsides of leaves.
Mites: Mites pose a serious threat a wide variety of plants, and can seriously impact the visual appearance of a plant. Mites favor warm, dry climates, and are an extremely serious issue for many homeowners.
Tent Caterpillars: Caterpillars can weaken many trees and shrubs, increasing the chance of a secondary infestation. Look for silken, yellow cocoons.
Borers: Borers are attracted to unhealthy trees, burrowing in and laying eggs inside the trunk. The best defense against borers is to keep your trees healthy and unstressed.
Termites: One of the most common pests, these insects can cause the death of a tree if left untreated. They will cause long term effect as they will damage the heartwood or the roots of the tree and make the tree structurally unstable.
Scale Insects: These insects target primarily hardwoods and conifers. Some signs of an infestation include abnormal leaf and shoot growth, yellow or red leaves, and branch grouting.
Anthracnose Disease: This fungal disease affects deciduous and flowering trees. Look for a spotting of foliage in spring and summer.
Winter Injury: Even during mild winters, evergreens can lose moisture and not be able to replenish it. Thus, make sure your evergreens have sufficient soil moisture. Extreme weather flucttuation can lead to bark peel/ crack.
Weevil Insects: Weevils are commonly found on flowers and fruits. Look for notches around the edge of leaves.
Aphid Insects: Aphids are small and pearl shaped. An infestation can cause yellow discoloration and defoliation.