AbstractGreenhouse experiments were conducted during 1969 to evaluate the enhancement of Atrazine activity by the addition of mineral and vegetable oils. Two grassy weeds, crabgrass and yellow foxtail, were used as test species. The results showed that grassy weeds may be controlled with lower rates of Atrazine by using non-phytotoxic oils as adjuvants. Differences in Atrazine enhancement were observed among the oils tested and the rates of application. Early postemergence applications (weeds at the one- to two-leaf stage of growth) resulted in better control than applications delayed 1 week.
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