Desempenho agronômico de sementes de soja tratadas com produtos fitossanitários químicos e biológicos

Abstract

This work aimed to evaluate the efficiency of the association between chemical and biological phytosanitary products on some parameters, through seed treatment, the development of the initial cultivated soybean crop. The experimental design was in randomized blocks with 4 blocks, totaling an area of 80 hectares (ha), with 20 ha for each block. The treatments used on the seeds were: T1 – Piraclostrobina; Tiofanato metílico; Fipronil; T2 – Bacillus firmus + Clotianidina + Piraclostrobina; Tiofanato metílico; Fipronil; T3 – Fipronil + Tiofanato-Metílico; Fluazinam + Bacillus subtilis + Bacillus licheniformis + Purpureocilium lilacinum (= Paecilomyces lilacinus) and T4 - Witness. The evaluations were carried out in each block at 7, 14, 21 and 28 days after planting (DAP), with 10 plants being removed from each block, corresponding to each treatment, randomly, evaluating the stand, height and health of the plants. The data were subjected to analysis of variance (ANOVA), with comparison between treatment means performed using the Scott-Knott test (p ≤ 0.05). A statistical difference was observed between chemical and biological phytosanitary treatments for plant stand, height and health, except for the health variable, where there was no statistical difference between treatments at 7 and 14 DAP. It was possible to conclude that treatment 2 was superior in both variables analyzed, represented by the association between Votivo® Prime + Poncho® + Standak® Top, and it was possible to conclude that the association of chemical and biological products provided better development of soybeans. Keywords: Plant protection. Bacillus. Clotianidin. Purpureocilium lilacinum. Fipronil. Pyraclostrobin. Methyl Thiophanate.