Soil and Residual Herbicide Affect Peanut Seedling Development

Abstract Greenhouse experiments were conducted to determine the effect of soil type, residual herbicide, and herbicide rate on peanut seedling development. Diclosulam, flumioxazin, and sulfentrazone were evaluated at three rates in soils with different pH and mineral fractions from Georgia and Texas. Total peanut biomass (mg root plus shoot per seedling) in nontreated soil types were Faceville sandy clay loam > Duval sand > Pelham sandy loam > Brownfield loamy sand > Tremona sand > Tifton loamy sand. Averaged across all soils, total nontreated dry weight biomass was 722 mg plant−1, with a range of 574 to 841 mg plant−1, respectively. Averaged across soils, shoot length and shoot and root biomass were greatest in nontreated control > diclosulam > flumioxazin > sulfentrazone; and shoot lengths were greatest in nontreated control  =  flumioxazin  =  sulfentrazone > diclosulam. Herbicide rate did not affect peanut development. When soil pH was 7.8 (Tremona and Brownfield), peanut root biomass was significantl...