​​​​Cotton Diseases in 2019

February 2020 | 11 min., 17 sec.
by Terry Wheeler
Texas A&M AgriLife Research

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​In 2019, nematodes (root-knot and reniform) caused the most significant cotton disease problems in the Southern High Plains. Advanced cotton-breeding lines and varieties with two-gene resistance had much lower densities of root-knot nematode in a field trial than root-knot-susceptible varieties. Breeding lines with reniform nematode resistance from Phytogen had less reniform reproduction than most commercial varieties in a field trial. These reniform-resistant lines also grew much larger than commercial cotton varieties in a reniform field. There was little Verticillium wilt and bacterial blight in 2019, although differences in variety susceptibility to these diseases are presented.

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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