COMPARISON OF POSTEMERGENCE HERBICIDES FOR COMMON BERMUDAGRASS (CYNODON-DACTYLON) CONTROL IN PEANUT (ARACHIS-HYPOGAEA)

Field experiments conducted from 1990 through 1993 evaluated single an d sequential applications of various postemergence graminicides for co mmon bermudagrass control in peanut. UBI-1956 at 70 and 100 g/ha appli ed early POST (EP) or sequentially, controlled common bermudagrass equ ivalent to fluazifop-P applied EP or sequentially. Clethodim provided variable common bermudagrass control. Clethodim applied EP provided be tter control than sethoxydim while control from sequential clethodim a pplications were equivalent to fluazifop-P. Fenoxaprop-ethyl alone fai led to control common bermudagrass while the addition of fluazifop-P t o fenoxaprop-ethyl improved control at least 22% in two of three years . Quizalofop applied EP and fenoxaprop applied sequentially provided c ommon bermudagrass control equivalent to fluazifop-P. Fenoxaprop-ethyl or sethoxydim applied once or twice controlled common bermudagrass si milarly. Peanut yield increases from common bermudagrass control were erratic.