| Home > Pest management > Armillaria root rot |
| In Michigan, armillaria root rot is common in Montmorency tart cherry orchards located on sandy, well-drained soils. Affected trees may exhibit poor growth for one or two years and then die suddenly in mid- to late summer. The disease spreads out from a central area of one or two initially infected trees. Clusters of honey-colored mushrooms may arise at the bases of dead trees in late August
or September. |
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| A thick, white, fan-shaped fungal mat is often present between the necrotic inner bark and the wood of the tree’s crown (left). Armil-laria is distinguished from other fungi by its dark brown to black, shoestring-like structures called rhizomorphs (right). |
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- For more monitoring information and evaluation of available pesticides:
Michigan Fruit Management Guide
- MSU Diagnostic Services for assistance in pest identification.
- MSU Fruit Crop Advisory Team Alert newsletters for current pest/crop conditions.
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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). |
