| Insect Pests According to Type of Injury | ||||
| Defoliators | Sucking Insects | Borers | Gall-Makers | Root Feeders |
| Apple-and-thorn skeletonizer | Boxelder bug | Boxelder twig borer |
Ash flower gall |
Black vine weevil |
| Birch leafminer | Comstock mealybug | Bronze birch borer |
Cooley spruce gall adelgid (aphid) | White grubs |
| Birch skeletonizer | Cottony maple scale | Eastern pine shoot borer |
Eastern spruce gall adelgid (aphid) | |
| Black vine weevil | Euonymus scale | Elm bark beetles |
Honeylocust pod gall |
|
| Cankerworms | European fruit lecanium |
European pine shoot moth | Maple gall mites |
|
| Cedar (arborvitae) leafminers |
Giant bark aphid | Lesser peachtree borer | Oak galls | |
| Eastern tent caterpillar |
Juniper scale | Lilac borer | Pearleaf blister mite |
|
| Elm leaf beetle | Norway maple aphid | Locust borer | Poplar petiolegall aphid | |
| Euonymus webworm |
Oak lace bug |
Locust twig borer |
Poplar vagabond aphid | |
| European pine sawfly |
Oystershell scale | Northern pine weevil |
||
| Europeon spruce sawfly | Pine bark adelgid |
Pales weevil | ||
| Fall webworm | Pine needle scale |
Peachtree borer | ||
| Forest tent caterpillar |
Pine spittlebug |
Pine engraver |
||
| Gypsy moth | Pine tortoise scale | Pine root collar weevil |
||
| Imported willow leaf beetle | Spruce bud scale | Poplar-and-willow borer |
||
| Jack pine budworm |
Spruce spider mite | Twig pruner | ||
| June beetles | Woolly alder aphid | White pine weevil |
||
| Juniper webworm | Zimmerman pine moth | |||
| Larch casebearer | ||||
| Larch sawfly | ||||
| Lilac leafminer | ||||
| Linden looper | ||||
| Locust leafminer | ||||
| Maple leafcutter |
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| Maple trumpet skeletonizer |
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| Mockorange leafminer |
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| Mountain ash sawfly |
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| Oak leafshredder |
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| Oak skeletonizer | ||||
| Pear sawfly |
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| Poplar sawfly |
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| Redheaded pine sawfly | ||||
| Rose chafer | ||||
| Saddled prominent | ||||
| Spiny elm caterpillar | ||||
| Spruce budworm | ||||
| Spruce needleminer | ||||
| Walnut caterpillar | ||||
| Whitemarked tussock moth | ||||
| Yellowheaded spruce sawfly |
||||
| Yellownecked caterpillar | ||||
Return to Table of Contents (Common Pests of Trees in Ontario)
