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Cotton > Year-Round
IPM Program >
First Open Boll to Preharvest > Manage Verticillium
Wilt
Cotton
Manage Verticillium Wilt
Verticillium wilt
Symptoms: Leaves wilt and show interveinal yellowing before becoming necrotic. Light to dark-brown vascular
discoloration is prominent in the stem and branches. Defoliation and death of plants may occur. |
If you have evidence of a Verticillium problem in your field or if you plan to plant a new variety next season
with unknown Verticillium tolerance, conduct stem sampling (percent vascular
discoloration test), starting when the crop is mature.
If percent discoloration is high or if you would like to determine the length of time for rotation out of cotton to
manage Verticillium, consider sampling the Verticillium inoculum (microsclerotia) index levels using soil
sampling.
Verticillium-tolerant varieties are an ideal strategy in an IPM program for managing Verticillium. Consider
tolerant varieties that are appropriate to your growing conditions. See the Verticillium wilt pest management guideline
for cotton for more information.
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