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Black Knot

Dibotryon morbosum

Description:

Typically seen as a hard black crust on affected plant parts as shown in the photo.

Habitat:

This plant disease has spread across North America from its first sighting in Pennsylvania in 1821.

Notes:

I often find this fungi on wild plum trees.

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Gordon Dietzman
Spotted by
Gordon Dietzman

Minnesota, USA

Spotted on Mar 10, 2012
Submitted on Mar 12, 2012

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Reference

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