Pests and Diseases

US: Aerial stem rot, blackleg and tuber soft disease reported in Michigan potato fields

tuber soft rotAerial stem rot, blackleg and tuber soft rot of potato have been found in fields in MIchigan. Tuber soft rot results in rotting tissue that is mushy, slimy and water-soaked. Soft rot of the potato seed piece can occur following planting and results in poor emergence or create foliar symptoms) such as weak plants with curled and drooping leaves that often resemble wilt disease or water deficiency. Aerial stem rot symptoms appear as black lesions that are produced on infected stems. Blackleg symptoms appear as black lesions at the base of the stem and can quickly girdle the stem as they expand upward. Unlike tuber soft rot, infected plant stems have a black appearance. More

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