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Disease Control

2019 harvest progress snapshot

arkansas cotton harvest

In October, scientists from universities, the U.S. Department of Agriculture, seed companies, Cotton Incorporated and the National Cotton Council convened to discuss the knowns and unknowns about cotton leaf roll disease. Considerable information has been generated over the past year or so. Still, there is much to be determined. This viral disease was first identified from cotton in east central ... Read More »

Late season heat, dry weather aided Mississippi cotton

mississippi cotton

Parts of Mississippi’s landscape are turning white, but unlike some northern areas, this coloration is caused by cotton bolls opening for harvest, not snow accumulation. The U.S. Department of Agriculture estimated that nearly a quarter of Mississippi’s cotton crop had been harvested by Sept. 29. To date, 45% of the crop is rated in good condition and 39% fair. Cotton ... Read More »

A Year Of Learning

cotton blue disease cupping

Multidisciplinary Teams From Several Cotton States Work To Learn More About Cotton Leaf Roll Dwarf Virus. • By Amanda Huber, Southeast Editor • Teams of cotton researchers throughout the Cotton Belt are working diligently to learn more about the new disease that has garnered everyone’s attention. Although it was possibly in growers’ fields a year or two prior, researchers identified ... Read More »

Texas A&M Finds Southwestern Cotton Rust Disease In West Texas

cotton rust

The Texas A&M AgriLife Extension Service has found southwestern cotton rust disease in fields in western and southern Gaines County and along the county line between Cochran and Hockley counties. AgriLife Extension specialists say the severity of the disease is still low, and fungicide application is not yet necessary – but producers should be aware of the symptoms. Southwestern cotton ... Read More »

Cotton Blue Disease Discovered In Central Texas

cotton blue disease

A new viral disease of cotton found in recent years in several southeastern U.S. states has now been confirmed in Texas. The disease, cotton blue disease, was observed recently in a cotton field in Central Texas where multiple off-type plants were noted by a research group headed by Dr. David Stelly, a cotton breeder in the Department of Soil and ... Read More »

Cotton Cercospora Leaf Spot Observed Across North Carolina

cercospora leaf spot

• By Lindsey Thiessen • Cercospora leaf spot of cotton (Fig. 1), caused Cercospora gossypina (syn. Mycosphaerella gossypina), has been observed across North Carolina cotton growing regions. Foliar symptoms include reddish lesions that enlarge to have white to light brown centers. These symptoms may also be similar to other foliar diseases, like Stemphylium leaf spot or Alternaria leaf spot. Symptoms ... Read More »

Plant Disease Detection Using Smartphone Goes High Tech

smartphone disease detection

North Carolina State University researchers have developed a handheld device that can be plugged into a smartphone to help farmers identify plant diseases in the field. “All plants release VOCs (volatile organic compounds) as they ‘breathe,’ but the type and concentration of those VOCs changes when a plant is diseased,” says Qingshan Wei, an assistant professor of chemical and biomolecular ... Read More »