Abstract
Field studies were conducted to evaluate pendimethalin-applied preplant incorporated (PPI), prometryn-applied preemergence (PRE), or metolachlor-applied early postemergence (EPOST) in combination with glyphosate-applied EPOST or post-directed (POSDIR) for Amaranthus palmeri and Brachiaria platyphylla control in glyphosate-resistant cotton. Herbicide systems which included glyphosate-applied EPOST or POSDIR in combination with pendimethalin-applied PPI or prometryn-applied PRE controlled greater than 95% Amaranthus or Brachiaria. Herbicide systems which did not include glyphosate or included glyphosate-applied late post-emergence (LPOST) controlled less than 50% B. platyphylla. Greatest cotton yields were obtained with pendimethalin followed by glyphosate-applied EPOST followed by glyphosate plus prometryn-applied POSDIR.
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