Programa de fungicidas no controle de doenças em soja - safra 2020/2021

Abstract

The soybean crop (Glycine max (L) Merrill) is of fundamental importance for the country's economy and among the factors that can harm its productivity are diseases, which increase production costs and are responsible for the reduction in grain quality. This work aimed to evaluate the best time and amount of fungicide applications necessary for an efficient control of mildew and target spot. The work was carried out in the municipality of Sinop, Mato Grosso in the Pastorello Consultoria experimental area. To conduct this experiment, the cultivar NS7399 IPRO Nidera was used, sown on November 14, 2020. The experimental design used was randomized blocks, with 12 treatments and 4 replications. The efficiency of the products Picoxystrobin 100 g/L+Protioconazol 116.7 g/L; Trifloxystrobin 150 g/L+ Prothioconazole 175 g/L; Benzovindiflupir 50 g/L and Picoxystrobin 100 g/L; Azoxystrobin 100 g/L and Benzovindiflupyr 50 g/L; Mancozeb 750 g/kg was evaluated for diseases control, yield, and weight of a thousand grains. Through the analysis of the results of this experiment, it was concluded that there was no significant difference in relation to AUDPC in the control of Target Spot (Corynespora cassiicola) and downy mildew (Peronospora manshurica). In the parameters of productivity kg ha-¹, there was a significant difference between the treatments, in which the treatment Benzovindiflupir 50 g/L+Picoxistrobina 100 g/L; Picoxistrobina 100 g/L Protioconazol 116,7 g/L; Picoxistrobina 100 g/L Protioconazol 116,7 g/L+Mancozebe 750 g/kg presented higher productivity, with 3,079.9 kg, equivalent to 51.33 bags and 18.99% efficiency in the control of Target Spot (Corynespora cassiicola).