Abstract
Abstract Field experiments were conducted at Yoakum in south Texas and at Lamesa in the Texas High Plains area in 2007 and 2008 to evaluate peanut variety tolerance to S-metolachlor or paraquat alone or in combination applied postemergence 7 to 28 d after peanut emergence. Runner market-type peanut were evaluated at Yoakum (Tamrun OL02, York, and Florida 07) while runner (Flavorrunner 458) and Virginia market-types (NC-7 and Gregory) were evaluated at Lamesa. Peanut stunting with paraquat alone or S-metolachlor + pararquat combinations varied from 0 to 15% and increased as application timing was delayed. Runner market type yields were variable while Virginia market type yields were not affected by paraquat or any combinations. Peanut grade (% SMK + SS) of runner or Virgina market types were not affected by paraquat applications.
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