Other Insects
This page is dedicated to some of the non-fatal insects that affect trees. These include but are not limited to aphids, weevils, moths, wood boring insects and many other seconday pests of trees. Many of the insects that we will outline have many host trees. The insects themselves tend to be nuisance pests and are controled in some cases.
Box Elder Bug
Trees Affected: Box Elder
Best control method: Spraying
Timing: Spring to Summer
Why are these pests bad?
These pests gather in the house to mostly just be annoying. They feed on the box elder tree and nest within the tree. Not harmful to trees but a house nuisance pest.
Trees Affected: Broad range pest
Best control method: Spraying
Timing: Spring to Summer
Why are these pests bad?
Known to be a pest of trees and the home these insects get there name for an obvious reason.
Brown mamorated stinkbug
Honey Locust Plant Bug
Trees Affected: Honey Locust
Best control method: Spraying or trunk injections
Timing: Summer
Why are these pests bad?
These pests are very similar to aphids except they go for one kind of tree. This puts very high populations of them on a tree at once. Can easily defoliate a tree.
Gypsy Moth
Trees Affected: Many varieties of deciduous trees
Best control method: Spraying
Timing: Spring to Summer
Why are these pests bad?
The caterpillars are the issue and they eat in groups. Known to defoliate trees in a hurry. This pest is one that Minnesota will have to deal with very shortly.
Leaf Hopper
Trees Affected: Deciduous trees
Best control method: Spraying or injections
Timing: Spring to Summer
Why are these pests bad?
These pests are vector disease carrying insects. Can easily carry fungi and bacteria from tree to tree. The pest itself is relatively harmless.
Wholly Aphid
Trees Affected: Ash
Best control method: Spraying or injections
Timing: June-July
Why are these pests bad?
Showing up almost at random these pests feed on trees and create honeydew that makes a mess out of your landscape. The bug does minor damage when in mass.
Aphids
Trees Affected: Deciduous
Best control method: Spraying
Timing: Spring to Summer
Why are these pests bad?
The ultimate vector pest. This insect feeds on a variety of trees and easily carries disease from tree to tree. The bug itself is harmless.
Red Oak Borer
Trees Affected: Northern Red Oak
Best control method:Trunk injection only
Timing: Summer
Why are these pests bad?
This long horned beetle makes large galleries and can destroy a health red oak in a quick manner. Very similar to flat headed boring pests with the exception that they are also wood boring pests.
Common Tent Caterpillars
Trees Affected: Crab apple and apple
Best control method: Spraying
Timing: Summer
Why are these pests bad?
Another leaf eater except the nests tend to be disgusting looking. The damage looks far worse than it really is in most cases.
Cottonwood Borer
Trees Affected: Cottonwood, poplar
Best control method: Injection
Timing: Spring
Why are these pests bad?
Although the trees are not valuable and cause a mess some are very expensive to remove. This tree causes major dieback in areas they affect.
Weeping willow borer
Trees Affected: Weeping willow
Best control method: Trunk injection
Timing: Spring
Why are these pests bad?
The larvae of this insect eat the living layer of the host tree. This causes eventual death of the tree.
More to come soon!
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Best control method:
Timing:
Why are these pests bad?
