Selectivity of post-emergence herbicides in mung-green bean cultures

Abstract

The purpose of this work was to evaluate the selectivity of different herbicides in two seasons of application in the mung bean crop. The study was conducted at the State University of Goiás, Câmpus Ipameri. The treatments were arranged in a completely randomized design with six treatments (with weeding, without weeding, Fomesafen - 250 g i.a ha-1, Bentazon - 600 g i.a ha-1, Imazamox - 42 g i.a ha-1 and Paraquat dichloride - 400 g i.a ha-1), two herbicide application times (15 and 30 days after emergence), with four replicates, evaluated at 7, 15, 21 and 28 days after application. The evaluated characteristics were height, number of tripholes, diameter of plants and dry weight of shoots. The application of the paraquat dichloride caused death of the mung bean plants when applied in plants of 15 and 30 days of emergence. Bentazon, Imazamox and Fomesafen reduced initial growth when applied to 15 DAE, with subsequent recovery of the culture. Mung beans are tolerant to herbicides based on Bentazon, Imazamox and Fomesafen when applied at 15 and 30 days after emergence. Paraquat dichloride is not recommended for post-emergence use in the culture.