Aryloxyphenoxypropionate in association with others herbicides in controlling weedy rice and barnyardgrass

Abstract

The development of aryloxyphenoxypropionate-tolerant rice cultivars made possible the selective use of these herbicides tank mixed with others. Thus, this research aimed to evaluate the applications of aryloxyphenoxypropionates associated with latifolicides for controlling weedy rice and barnyardgrass. In a greenhouse, the weedy rice and barnyardgrass control were evaluated with treatments composed of doses from the graminicides quizalofop-p-ethyl (0; 37.5; and 75 g ha-1) or haloxyfop-pmethyl (0; 45; and 60 g ha-1), either isolated or with addition of bentazon, saflufenacil, carfentrazone and with no herbicide. In the field, the effect from doses of quizalofop-p-ethyl (37.5 and 75 g ha-1) was tested, either isolated or associated with penoxsulam, bispiribac-sodium, quinclorac, propanil, bentazon, saflufenacil, carfentrazone and penoxsulam + bentazon for controlling weedy rice. When using a tank mix of herbicides from the aryloxyphenoxypropionates group with bentazon, saflufenacil or carfentrazone, there was a predominance of antagonistic interactions for weedy-rice, and additives interactions for barnyardgrass. In the field, the mixtures of quizalofop-p-methyl (75 g ha-1) with penoxsulam, bispiribac, quinclorac, propanil, bentazon, saflufenacil, carfentrazone or penoxsulam + bentazon resulted in excellent control of the weedy-rice.