COMPORTAMENTO DE CULTIVARES DE SOJA EM RELAÇÃO AO Pratylenchus Brachyrus

Abstract

Soybean is the most economically important legume grown in Brazil today, making the country the world's largest producer of this oilseed. With the expansion of culture, there was an increase in phytosanitary problems, including the nematode Pratylenchus brachyurus. This fact has led growers to search for better management technologies, as well as the search for cultivars that are tolerant and/or resistant to the nematode. The objective of this work was to identify the behavior of soybean genotypes related to the nematode Pratylenchus brachyurus, in a greenhouse at the company GDM Genética do Brasil S.A., in the city of Cambé - PR. Eleven genotypes were evaluated, and the experimental design was completely randomized, using 10 replications. The greenhouse evaluations were focused on traits: volume, root fresh mass, reproduction factor, and final population. Sample evaluations and processing were performed 60 days after inoculation. It was observed that all genotypes have the ability to multiply P. brachyurus, however the cultivar BMX FOCO had one of the smallest final populations.