EFFECT OF THE APPLICATION OF SUPPOSEDLY ANTAGONISTIC HERBICIDES ON RICE PLANTS SUSCEPTIBLE TO ACCASE INHIBITORS

Abstract

The control of weedy rice has been widely studied in weed science. However, gene flow from Clearfield rice (CL) to weedy rice has damaged the efficiency of the CL production system. A new rice crop that is resistant to ACCase inhibitor herbicides will be launched in the next year on the market, representing another tool for managing weedy rice in irrigated rice crops. In addition to using this tool, there is a need to increase the spectrum of herbicide treatments to control the diversity of weed species in irrigated rice crops. This study aimed to elucidate the effect of latifolicidal herbicides on the graminicide action of quizalofop on cultivated rice as an indicator plant in the simulation of weedy rice. An experiment was carried out in a greenhouse at the Epagri – Experimental Station of Itajaí, Santa Catarina, Brazil. There was a reduction in the efficiency of rice control for all evaluated doses of quizalofop associated with 2,4-D.