The root-knot nematode Meloidogyne incognita is one of the most prevalent species in Brazil, causing significant damage to several crops. This pathogen induces the formation of root galls through hypertrophy and hyperplasia of cells. To mitigate these losses, cultural control with cover crops has shown promising results, since antagonistic species can reduce nematode reproduction while improving soil physical and chemical properties. This study evaluates the efficacy of nine green manure species in controlling the root-knot nematode Meloidogyne incognita in a greenhouse experiment. Using a susceptible soybean cultivar as a control, the authors measured nematode final population and reproduction factor (RF). The study found that all tested green manures were resistant (RF < 1), with Stylosanthes capitata demonstrating immunity (RF = 0), effectively suppressing nematode reproduction.
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