Abstract: Background: The possibility of intoxicating non-tolerant soybean with dicamba is an important and currently problematic in agricultural fields. Objective: Six experiments were carried out to evaluate the correlation between toxicity of low dicamba rates and yield of non-tolerant soybean cultivars. Methods: Three areas were selected and two experiments were carried out in each area: one for soybean at V3 and another for R1/R2 stage. Five dicamba rates (five treatments) were applied in each experiment. Toxicity was evaluated at 7, […]

Abstract: Background: There is not sufficient information about the efficiency of pyroxasulfone to the control of the main weeds that infest Brazilian agricultural areas. Objective: The objective of this study was to evaluate the efficiency of the pyroxasulfone treatments to control some of the main weeds present in Brazil in comparison to S-metolachlor and trifluralin. Methods: The treatments consisted of five doses of pyroxasulfone (50, 100, 150, 200 and 250 g ha−1), two doses of S-metolachlor (960 and 1920 g […]

Abstract: Background: Diazotrophs bacteria that promote plant growth have been studied as a strategy to increase the productivity of rice cultivation. Herbicides are used to prevent weed infestations. Objective: The evaluation of herbicides effect on diazotrophic bacteria strain associated with the growth of Red Small rice. Methods: Three experiments were conducted: I – in vitro growth of bacterias (Azospirillum brasilense strain 245 and Herbaspirillum seropedicae strains 26H, Z67, Z94, ZA25 and ZAL95); II – germination of red rice seeds; III […]