Leaves on plants infected with Verticillium wilt turn yellow, wither, and fall, beginning at the base of canes and progressing upward. Fruiting canes may take on a bluish black cast and die during the summer as fruits are maturing. Small groups of plants may be affected.
Solutions
The fungus that causes Verticillium wilt survives in soil, building up on other host plants. Avoid planting cane fruits in soils formerly planted to other hosts of the fungus such as tomatoes. Soil solarization may be attempted before planting if Verticillium is known to be a problem. Some varieties may be resistant.
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