Abstract
Abstract The use of a cotton-peanut crop rotation system has been beneficial in that it reduces disease incidence which can improve crop yield. However, peanut remaining in the soil after harvest may become problematic if they germinate the following year when fields are rotated to cotton. Field studies were conducted in south and west Texas to evaluate postemergence (POST) cotton herbicides for control of peanut. In west Texas using Spanish peanut, glyphosate at 1.26 kg ae/ha applied early POST or mid-POST controlled peanut at least 91% in one of two years; however, glyphosate applied at 0.84 kg ae/ha at the same application timings controlled peanut 80% or less in both years. Glufosinate at 0.73 kg ai/ha, and MSMA at 2.24 kg ai/ha controlled Spanish peanut 63 to 75%. In south Texas on six runner peanut cultivars, diuron plus MSMA, glyphosate at 1.26 kg ae/ha, glyphosate at 0.84 kg/ha applied twice, glyphosate at 0.84 kg/ha plus flumioxazin at 0.04 kg ai/ha, glufosinate at 0.47 and 0.58 kg ai/ha, or trif...
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