Eficiência de nematicidas microbiológicos no controle de Pratylenchus brachyurus na soja

Abstract

Phytopathogenic nematodes, such as Pratylenchus brachyurus, pose a significant threat to soybean production, causing substantial damage and reducing crop productivity. Effective control of these nematodes is essential to guarantee the health and yield of soybean plants, and the use of microbiological nematicides appears as a promising strategy for this purpose. The objective of this study was to evaluate the effectiveness of different nematicides in controlling P. brachyurus in soybean crops. The experiment was conducted under field conditions, in which different nematicide treatments were applied to soybean seeds. The 4 treatments (1-control, without product; 2-Nemat®, Purpureocillium lilacinum; 3-Trunemco®, Bacillus amyloliquefaciens; 4-Avicta® 500 FS®, abamectin, being the positive control standard) were distributed according to the experimental block design randomized, with 4 replications per treatment and several variables were evaluated throughout the plant growth cycle, including productivity, plant stand, plant height, nematode infestation in the soil and roots. Avicta 500 FS®, Nemat® and Trunemco® products increased initial soybean plant stand when applied in seed treatments. However, all products tested did not influence the height of the soybean plant and did not reduce the population of P. brachyurus in the roots. Trunemco® was the product that most reduced the P. brachyurus population in the soil. Avicta 500 FS® and Trunemco® products increased soybean productivity.