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IPM Scouting in Stone Fruits

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European brown rot – Monilinia laxa (Aderh. & Ruhl.) Honey
IPM scouting in stone fruits > European brown rot
This rot is potentially serious on tart cherry cultivars Meteor, English Morello and Danube (Érdi bõtermõ) but rare on Montmorency. Wet periods lasting for a day or more are required for severe blossom infection and spur dieback. Newly infected blossoms and later spur leaves turn brown and shrivel. One- to 3-inch-long elliptical cankers, often with gummosis, are formed at the bases of blighted spurs. The fungus may produce tufts of ash-gray conidia on blossom debris, dead spurs and cankers in the second or third season after infection. Fruit infections are rare.
Spur dieback Canker, gumming around dead spur
Spur dieback on Meteor cause by European brown rot. Bark removed to show canker, gumming around dead spur.
Additional information
Images on this page provided by Alan L. Jones.

This information was developed from A Pocket Guide for IPM Scouting in Stone Fruits by David Epstein, Larry J. Gut, Alan L. Jones and Kimberly Maxson-Stein. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2840).
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 7/24/07