Now that we’re in the midst of the growing season, caseload at the UW Insect Diagnostic Lab (IDL) is currently high. Recent cases at the IDL involving insects relevant to fruit crops are summarized below.
Keep in mind that this report does not represent all fruit crop activity in Wisconsin. Rather, it reflects samples and cases submitted to the IDL. Scouting your own crops is a key IPM practice!
| Pest | Scientific Name | Wisconsin Region* | Crop | Notes |
|---|---|---|---|---|
| Aphids | Aphididae | SC, SE, C, WC | Apple Plum Cherry | Overall damage minor; natural enemies abundant |
| Cottony Scale | Pulvinaria sp. | SC | Grape | Female with ovisac on vine |
| Forest Tent Caterpillar | Malacosoma disstria | NC | Apple | Low numbers noted. Nearly ready to pupate. |
| Four-Lined Plant Bug | Poecilocapsus lineatus | SC, C, WC, NC | Apple Strawberries | Minor damage |
| Grape Flea Beetle | Altica chalybea | SC | Grapes | Larvae feeding on grape foliage |
| Plum Curculio | Conotrachelus nenuphar | SW, SC, SE | Apples Cherries | Crescent-shaped scars |
| Slugs | Mollusca | NC, SC | Strawberries | Could pose a risk as fruits develop |
Free Diagnostic Support from the UW Insect Diagnostic Lab
Growers and consultants in need of insect diagnostic services are always welcome to submit samples to the UW Insect Diagnostic Lab.
Lab services are provided free of charge.
Information about submitting samples to the lab be found on the IDL website: insectlab.russell.wisc.edu.
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