New Sources of Cylindrocladium Black Rot Resistance among Runner-Type Peanut Cultivars

Branch, W.D. and Brenneman, T.B. (2012) New Sources of Cylindrocladium Black Rot Resistance among Runner-Type Peanut Cultivars. Peanut Science, 39 (1). pp. 38-42.

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Cylindrocladium Black Rot (CBR) caused by Cylindrocladium parasiticum Crous, Wingfield, & Alfenas syn. C. crotalariae (Loos) Bell & Sobers is a major disease problem in southeast U.S. peanut (Arachis hypogaea L.) production. Field trials were conducted for two-years (2008-09) at a test site (Gibbs Farm) that has a long history of continuous peanut production near the Univ. of Georgia, Coastal Plain Expt. Station, Tifton, GA to evaluate for CBR resistance among new runner-type peanut cultivars. All plots were artificially inoculated with microsclerotia of C. parasiticum after planting each year. Significant differences (P≤0.05) were found among the cultivars and advanced breeding lines for both CBR resistance and tomato spotted wilt virus (TSWV) resistance which was also present each year, but the predominant disease was CBR. Georgia Greener, Georgia-06G, Georgia-07W, Georgia-02C, and Carver were consistently found to be the most CBR resistant; whereas, C-99R and Tifguard were the most susceptible each year. In separate CBR tests conducted in 2009 and 2010 at a different location (Blackshank Farm), Georgia Greener also had the least difference, and Tifguard had the greatest difference, between C. parasiticum inoculated versus non-inoculated plots for pod yield. These combined test results demonstrate that useful levels of CBR resistance are currently available in promising new runner-type peanut cultivars

Item Type: Article
Uncontrolled Keywords: Arachis hypogaea L., groundnut, inoculated evaluation, disease incidence, pod yield, Cylindrocladium parasiticum, Crous, Wingfield, and Alfenas
Author Affiliation:  University of Georgia, Dept. of Crop & Soil Sciences, Coastal Plain Experiment Station, 2360 Rainwater Road, Tifton, GA 31793-5766
Subjects: Plant Production
Plant Protection
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 04 Feb 2013 03:41
Last Modified: 04 Feb 2013 03:41
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