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ARS Home » Research » Publications at this Location » Publication #91088
Title: REACTION OF PEANUT GENOTYPES TO SCLEROTIUM ROLFSII UNDER GREENHOUSE CONDITIONS

Author
item Melouk, Hassan
item ABOSHOSHA, S - ALEXANDRIA UNIV EGYPT
item SAUDE, C - OKLA STATE UNIV

Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/10/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Eight-wk-old peanut plants were inoculated with sclerotia of Sclerotium rolfsii. Two hundred fifty mg of dried crushed peanut leaves (DCPL) were spread around the base of each plant. Five sclerotia were placed on soil amended with DCPL next to each plant stem. Plants were incubated in clear polyethylene chambers at RH of > 95% and 25+/-2 deg C. Infection on main stems was categorized from 1 to 5, where 1 = up to 20% of stem length colonized, 2 = > 20 40% 60% 80%. Three isolates of S. rolfsii, from Quincy, FL (F), Tifton, GA (T), and Yoakum, TX (Y), were used. Eight peanut genotypes, Florunner, Georgia Green, Okrun, Southern Runner, Tamrun 96, TX901417, TX901338-2, and UF91108, were used. Over genotypes, isolates F and T colonized more stem length than isolate Y at 11, 14, and 17 days after inoculation (DAI). Over isolates, Georgia Green, UF91108, and Southern Runner had infection categories of 3.8, 3.9, and 4.0, respectively, at 17 DAI. The other genotypes TX901417, TX910338-2, Tamrun 96, Okrun, and Florunner had infection categories of 2.8, 2.9, 3.0, 3.0, and 3.1, respectively.