Abstract
Nematodes are of great importance in soybean cultivation, especially the Pratylenchus brachyurus known as root lesion nematode. Its attack on plant roots causes less efficiency in the absorption of water and nutrients, in addition to damaging the plant's development. There is still no fully efficient method to control this phytopathogen, however, some products are available on the market, including biological control. Thus, the aim of this study was to evaluate commercial biological products in the efficiency of reducing the nematode population in soybean crop in Goiás, Brazil. The design was completely randomized in a 2x4 factorial scheme, the first factor being two soybean genotypes (Brasmax Bônus and Nidera NS 8383) and the second factor the treatments consisting of different dosages in an association of three commercial products: No-Estio®, Bio-fertility® and Radic®. The treatments used were: T1 control - without application of the products; T2 half the recommended dose; T3 the recommended dose and T4 a dose and a half that recommended by the manufacturer. Plant evaluation was carried out after 75 days of nematode inoculation. The results obtained showed that both cultivars hosted P. brachyurus, however, the treatments using the products had a lower population density of this nematode. It was concluded that the two soybean cultivars are hosts of Pratylenchus brachyurus. The agronomic character plant height was more affected when there was no application by the biological method. The association of No-Estio®, Bio-fertility® and Radic® products reduced the population density of nematodes in infected plants.
Highlights
Soybean (Glycine max L.) is an oleaginous plant species belonging to the Fabaceae family, originally from China, with a determined and indeterminate growth habit, standing out for being one of the most important economic crops in the world (Villalva, 2008; Zhao et al, 2018)
Soybean is one of the main agricultural commodities exported by Brazil
The seeds used in the experiment are indicated for the Midwest region and were acquired from rural producers in Goianésia, Goiás, Brazil
Summary
Soybean (Glycine max L.) is an oleaginous plant species belonging to the Fabaceae family, originally from China, with a determined and indeterminate growth habit, standing out for being one of the most important economic crops in the world (Villalva, 2008; Zhao et al, 2018). The cycle of this plant can vary, showing early to late cultivars, in addition to containing different resistance to phytopathogens (Sediyama, 2009). Production in the 2020/21 crop was approximately 136 million tons (Conab, 2021) This oilseed is used for various purposes, mainly in animal nutrition and human food. This culture increases regional economic development, agricultural industrialization, machinery, inputs and feed, and immense use in the production process (Mello & Brum, 2020)
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