Tree & Shrub Insects: Spider Mites.
Spider mites are a common pest in Northwest Ohio and Southeast Michigan; there are multiple species. They can be controlled and do produce silken web material like a spider, which they are related to. Due to their size, they are often overlooked. Using a white piece of paper under the suspected infected branch, shake the branch. If you see small black, brown or reddish 'dots', you may have spidermites.
The damage first appears like lines of yellow dots on the leaf of the plant (from spider mites feeding on the plants cell and killing portions of the leaf or needle). During heavy infestations, whole leaves may be stripped and killed. If they spider mite population is minimal, treatment may not be needed.
Trees and shrubs Attacked:
Arborvitae, Azalea, Black Locust, Dogwood, Douglas-fir, Elms, Fruit trees, Juniper, Hawthorn, Hemlock, Honeysuckle, Hydrangea, Linden, Magnolia, Maple, Persimmon, Pine, Poplar, Redbud, Rose, Spruce, Tulip tree, Walnut
Damage to look for :
- Discoloration of leaf
- Dry, brittle texture to the leaf
What homeowners can do:
- Keep the plants hydrated during dry times
- Do not apply the insecticide Sevin to control spider mites (though it can be used on other insects - please read and follow all label instructions prior to use) as studies have indicated they will reproduce faster
- Horticulture oils can be applied to trees and shrubs, though it is only recommended in warm (not hot) conditions on hydrated plants.
If you believe your trees or shrubs have insect activity, call Grounds Services today for a no-obligations visit at 567-952-0057.
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