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| Crown gall - Agrobacterium tumefaciens (E.F. Smith & Townsend) Conn | |||
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Tumors or galls are produced on the roots and crown and, under special circumstances, on aboveground portions of plants. Galls begin as small, smooth growths that enlarge to become dark, hard, woody tumors with gnarled, irregular surfaces. Old galls may be covered with secondary fungi and riddled by insects. Orchard trees with one or more large galls on the crown are often stunted. | ||
Additional information
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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). |
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Updated: 03/03/08