Verticillium wilt—Verticillium dahliae
Wilting of leaves is a common symptom of plants infected with Verticillium wilt. Eventually the margins
and tips of leaves become dry and turn brown. The vascular system of the roots, stem, and branches shows
light brown discoloration.
Verticillium wilt is caused by a soilborne fungus and can survive in the soil indefinitely as microsclerotia
that germinate in the vicinity of roots. Verticillium wilt is favored by cool air and soil temperatures.
Where Verticillium has been a problem, follow good sanitation practices and avoid ground previously
planted with potatoes, tomatoes, or cucurbits. The fungus has an extremely wide host range, including
many common weeds. Rotate peppers with nonhosts, such as corn, for a period of 2 years. Using soil
solarization before planting may help reduce Verticillium levels in the soil.
infected pepper roots