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IPM Scouting in Woody Landscape Plants

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Honeylocust mite - Eotetranychus multidigituli
IPM scouting in woody landscape plants > honeylocust mite
This mite’s only host is honeylocust. It overwinters as a red, adult female in bark crevices, twigs and bud scales. There are multiple generations per year. Egg laying begins early in the season, around mid-April as Cornelian cherry blooms. Eggs are deposited near developing buds. Nymphs start out pale yellow and darken to green as they develop. Symptoms of injury include yellowing and stippling of leaves and early defoliation of leaflets in July and August. Use a hand lens to look for mites on undersides of leaflets, or shake branches over a white sheet of paper. The size of the mites is less than 0.3 mm.

Management: Treat overwintering mites before egg laying begins. Adults and nymphs are vulnerable to many miticides, including soaps and oils. Check mite populations in mid-summer and treat if needed. Trees usually survive late season defoliation.

Honeylocust tree Adult female and eggs
Defoliated tree in late summer. Female adult (left arrow) and eggs laid at base of honeylocust leaf bud (right arrow).
Additional information
This information was developed from A Pocket IPM Scouting Guide for Woody Landscape Plants by Diane Brown-Rytlewski. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2839).
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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Updated 7/09/07