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- Bacterial Diseases: Such as Fire blight which is spread by wind and also by bees that are pollinating
trees.
- 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.
- Gall
Insects: Such as Ash Flower Gall, Popular Bud Gall, and Cooley Spruce Gall Adelgid which may not cause the death
of a tree but can be unsightly.
- 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 gouting.
- 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.
- 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.
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