Field studies were conducted in 1988 and 1989 to compare the sensitivity of eight genetically diverse peanut (Arachis hypogaea L.) genotypes to early applications of chlorimuron. A split-plot experimental design was used to allow comparison between treated and nontreated peanut for each genotype. Chlorimuron (0.009 kg ai ha-1) was applied 30 and 37 days after emergence in 1988 and 1989, respectively, to Florunner, Tifrun, Tifton 8, GA-207-3-4, New Mexico Valencia A, New Mexico Valencia C, Tamnut 74, and Pronto peanut. Chlorimuron reduced the percentage of total sound mature kernels when averaged across all genotypes, but was not specific to genotype. Chlorimuron reduced the weight of 100 kernels of Tifrun, Tifton 8, and New Mexico Valencia C in both years. The unit values of GA-207-3-4 and New Mexico Valencia C were significantly reduced both years by early applications of chlorimuron. Yields of Tifrun, Tifton 8, and GA-207-3-4 were reduced both years. Gross returns, which reflect effects on grade, unit value, and yield, were reduced by early applications of chlorimuron for Tifton 8 and GA-207-3-4 in both years. Based on these results, Tifrun, Tifton 8, GA-207-3-4, and New Mexico Valencia C are more inherently sensitive to chlorimuron than the other genotypes.
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Keywords: peanut injury, varietal susceptibility to herbicides
How to Cite:
Johnson, W. & Holbrook, C. & Mullinix, B. & Cardina, J.,
(1992) “Response Of Eight Genetically Diverse Peanut Genotypes To Chlorimuron¹,²”,
Peanut Science 19(2),
01 Jul 1992