Thielaviopsis the Black Rootrot - A Serious New Threat to California Cotton Production

R.H. Garber, J.E. DeVay, and R.J. Wakeman


 
ABSTRACT

Black rootrot associated with the fungus Thielavi opsis basicola (Berk. & Br.) Ferr., has been recognized as a disease of cotton in California since 1956. In the succeeding years more and cotton acreage has been identified as infested with this fungus. In 1983 and 1984 an estimated 15 percent of the states 1,300,000 acres planted to cotton were thought to have been effected. Losses up to one-half bale or more per acre have been reported by large growers in several areas of the San Joaquin Valley. In addition, during the past three years assays of soils from Alabama, Mississippi and Texas in our laboratory indicate surprisingly high levels of T. basicola.



Reprinted from 1985 Proceedings: Beltwide Cotton Production Research Conferences pg. 25
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998