Submitted to: Oklahoma Agriculture Experiment Station Departmental Publication
Publication Type: Experiment Station
Publication Acceptance Date: 10/23/1999
Publication Date: N/A
Interpretive Summary: Article summarizes current status of cooperative research efforts; no new research reported
Technical Abstract: Peanut yield and quality are affected by several diseases, most of which are caused by fungi. Sclerotinia blight and other soilborne diseases are major factors that adversely affect peanut health, productivity, and quality in Oklahoma and other peanut producing states. These diseases are caused by pathogens that have broad host ranges and are able to survive under adverse conditions for extended periods, sometimes for several years by producing resistant structures. These diseases are endemic under continuous cropping of peanut. Continuous cropping favors the build-up of populations of soil pathogens to a level that often causes severe epidemics on an annual basis. In Oklahoma, the most economically important soilborne diseases of peanut besides Sclerotinia blight include southern blight, pod rot, Verticillium wilt, and diseases caused by root-knot and root lesion nematodes. Chemical management of these disease is often necessary, but it can be costly.