SELETIVIDADE DE FORMULAÇÕES DE FLUMIOXAZINA EM PRÉEMERGÊNCIA NA CULTURA DA SOJA

Abstract

Soybean cultivation has great economic importance for Brazilian agribusiness and strongly depends on efficient weed management practices to ensure high productivity levels. In this context, the use of pre-emergent herbicides has gained importance, especially due to the increasing occurrence of resistance to post-emergent herbicides. The present study aimed to evaluate the selectivity of different flumioxazin formulations applied in pre-emergence in soybean cultivation, analyzing their possible effects on crop development and productivity. The experiment was conducted at the Instituto Federal Goiano – Campus Urutaí, from November 2024 to March 2025, using a randomized block design with 12 treatments and four replications, arranged in a 4 × 3 factorial scheme, involving three herbicides containing flumioxazin and three soybean cultivars. The evaluated parameters included visual phytotoxicity, plant height, yield, and thousand-grain weight. The results indicated the occurrence of initial phytotoxicity symptoms in all herbicide treatments; however, these were considered low, allowing plant recovery throughout development. No significant differences were observed among herbicides regarding yield and thousand-grain weight. Among the evaluated cultivars, NEO 761 showed greater tolerance to the treatments. It can be concluded that the evaluated flumioxazin formulations present adequate selectivity for soybean cultivation under the conditions of the experiment, without significantly compromising the productive performance of the studied cultivars.