Interação de Roundup Ready® com latifolicidas no controle de Euphorbia heterophylla, Commelina benghalensis, Ipomoea grandifolia e Spermacoce latifólia

Abstract

Aiming at verifying possible interactions of Roundup Ready® in tank mixture with cloransulam-methyl, fomesafen, lactofen, chlorimuron-ethyl, flumicloracpentyl, bentazon and imazethapyr in four different weed species (Euphorbia heterophylla, Commelina benghalensis, Ipomoea grandifolia and Spermacoce latifolia), and in two development stages (from 1 to 3 leaves and from 4 to 6 leaves), this experiment was carried out in greenhouse. We concluded that E. heterophylla and I. grandifolia with 1 to 3 leaves were better controlled than the ones with 4 to 6 leaves by Roundup Ready® mixtures at the highest rate (960 g e.a.ha-1) and by the isolated product. In isolated applications at two rates of Roundup Ready®, the highest rate presented better control. S. latifólia with 4 to 6 leaves was better controlled than the other studied species. I. grandifolia with 4 to 6 leaves was better controlled by mixtures in relation to the application of isolated Roundup Ready® at the highest rate. C. benghalensis with 1 to 3 leaves was better controlled by mixtures in relation to applications of isolated Roundup Ready® at the lowest rate. The behavior of Roundup Ready® mixtures with other herbicides varies according to the Roundup Ready® rate, the herbicide to be mixed, the species to be controlled, and the development stage of the weed.