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Nodular galls on forsythia stems. The cause is uncertain.

Uncertain cause of these galls has been attributed to Agrobacterium tumefaciens, a genetic disorder, Phomopsis sp., and Pseudomonos savastanoi. Credit: APictche<br />Licensed under a <a href=" https://creativecommons.org/licenses/by-sa/4.0/deed.en ">Creative Commons Attribution-ShareAlike 4.0 International License</a>
Credit: APictche
Licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
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