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Crown gall

Agrobacterium tumefaciens (bacterium)

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35.1782, -80.8487

Field Notes

Description:

a large, hard, dry, rough, cracked, woody tumor found on the branch of a declining young apple tree caused by bacterium

Habitat:

urban schoolyard

Notes:

Galls can interrupt the flow of nutrients and water within the tree, reducing overall plant growth and vigor

Reference Links:

Crown gall : Yard and Garden : Garden : University of Minnesota Extension

Species ID Suggestions

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PublishedNovember 23, 2015

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