Often, some defoliation occurs. On fruit, a circular dark brown to black sunken lesion forms with pinkish-orange spore masses in the center. The disease is favored by humid wet weather and temperatures between 60 to 80 degrees. The disease is spread by tools, wind, splashing water, and insects. Alternaria Leaf Spot Circular tan spots with concentric circles form on the leaves.
Defoliation sometimes occurs.
The disease is favored by bright sunshine, frequent dews and showers, and temperatures between 60 and 90 degrees. The disease is spread by tools, wind, splashing water, and insects. Bacterial Wilt Infected leaves turn dull green then leaves, branches, and whole plants wilt and die. When the stem is cut and squeezed, a sticky, stringy ooze comes out. The disease is spread by cucumber beetles.