Update for Cotton Diseases in 2021, Including the Latest on Management for Nematodes, Fusarium Wilt, Bacterial Blight, and Verticillium Wilt​

January 2022 | 20 min., 03 sec.
by Terry Wheeler
Texas A&M AgriLife Research


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​​Management for nematodes typically consists of nematicides, nematode-resistant cultivars, and crop rotation to nonhosts or fallow. Four new reniform-resistant cultivars were introduced in 2021; all have resistance to both root-knot and reniform nematodes and reduced nematode population densities and increased yields in nematode-infested fields. Verticillium wilt was a problem for earlier-planted fields in 2021, and there was a significant incidence of disease by the second week in August. Eight cultivars were found to have less damage from Verticillium wilt and yielded well. Bacterial blight was a minor problem in 2021, despite conditions being conducive for the disease. This reduced incidence is attributed to most acres being planted with blight-resistant cultivars. The primary problems occurred on ST 5600B2XF, which is susceptible to bacterial blight. See also “Cotton Disease Complex: Fusarium and Root Knot Nematode​,” by Cecelia Monclova-Santana.

About the Presenter

Terry WheelerTerry Wheeler graduated with an MS from Texas A&M University in plant pathology and then a PhD from North Carolina State University in plant pathology. Both degrees were obtained with a specialization in plant nematology; work was conducted with root-knot nematode species on tobacco and peanut. Dr. Wheeler then worked as a research associate at the Ohio Agricultural Research and Extension Center in Wooster on potato early dying (a disease complex involving Verticillium wilt and lesion nematode) and then at Ohio State University on the soybean cyst nematode. In 1994, Dr. Wheeler moved to Lubbock, Texas, to work on cotton and peanut diseases in the southern High Plains of Texas for the Texas Agricultural Experiment Station (later renamed Texas A&M AgriLife Research). Nematodes are one of the most important and consistent issues facing cotton production in this region, and Dr. Wheeler has worked extensively in nematode management (chemical, germplasm, and crop rotation) with both the root-knot and the reniform nematodes.​

Contact Information:
Email: ta-wheeler@tamu.edu


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