Field studies were conducted in 1999 and 2000 to evaluate the response of three runner market-type peanut cultivars to diclosulam applied preplant incorporated at 0,18, 27, or 54 g ai/ha in a weed-free environment. Peanut cultivars evaluated included ‘Georgia Green’, ‘C-99R’, and ‘MDR-98’. Peanut injury was not observed with diclosulam at any rate or with any cultivar. Diclosulam did not affect peanut canopy development, percentage extra-large kernels, sound mature kernels, sound splits, total sound mature kernels, other kernels, or yield for any cultivar.

Nomenclature: Diclosulam; peanut, Arachis hypogaea L., ‘Georgia Green’, ‘C-99R’, ‘MDR-98’.

Additional index words: Herbicide injury, extra large kernels, grade parameters, other kernels, sound mature kernels, sound splits, total kernels.

Abbreviations: DAP, days after planting; ELK, extra large kernels; EPOST, early postemergence; OK, other kernels; PPI, preplant incorporated; PRE, premergence; SMK, sound mature kernels; SS, sound splits; TSMK, total sound mature kernels.