Garden Pest scouting calendar to help you know when to look for common pests before they become a problem. Keep in mind the times are approximate. Pest emergence also depends on weather temperatures and conditions.
GENERAL PESTS, APPROXIMATE TIME TO CHECK FOR TREATMENT
| Bagworm | Late May – Early June |
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| Scale | Early March – April Female eggs (Adult) | May – Early June (Crawler |
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| Borer | Mid-May to Mid-June (Larvae) |
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| Aphid | Early May to September Adult and Nymph |
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| Whitefly | Early May to September (Adult) |
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| Spider Mites | March – April (Egg) | May to September (Adult) |
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| Thrips | May to June (Adult) |
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| White Grubs | Mid-April – Mid-June (Larvae) | Late June – Mid-August (Adult) | Mid-August – Late September (Larvae) |
| Tent Caterpillars | Early-April and Mid-May (Larvae) |
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| Japanese Beetle | Mid-April – Mid-June (Larvae) | Late-June – Mid-August (Adult) | Mid-August – Late September (Larvae) |
| Leafhoppers | Mid-April – Early June (Adult and Nymph) |
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| Cutworm | Mid-April – Early June (Larvae) |
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| Lacebug | Early May – September (Adult) |
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| Caterpillars | May to September (Larvae) |
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| Leafminer | Early Spring (Egg) | April – June (Larvae) | Autumn (Egg) |
| Nantucket Pine Tip Moth | Early April – August (Larvae) |
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| European Pine Shoot Moth | April (Larvae) | Mid-June (Larvae) |
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For more information on any of these pest call your local Extension Office. 302 730 4000
Maggie L. Moor-Orth, Delaware Cooperative Extension,Delaware State University
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