The host status of glyphosate-tolerant soybean genotypes to Meloidogyne incognita and Pratylenchus infection

Abstract The host status of South African adapted, genetically modified (GM) glyphosate-tolerant soybean genotypes to root-knot (field and glasshouse) lesion (field) nematodes were assessed. Analyses root soil samples 29 (collected from seven production areas during the 2014/15 season) enabled identification nine plant-parasitic nematode genera 10 species. Predominant endoparasitic in Meloidogyne ( incognita M. javanica ) Pratylenchus brachyurus , P. zeae teres ). Rotylenchulus parvus was predominant semi-endoparasite soil, followed by Scutellonema Helicotylenchus sp. Only ‘PAN 1583 R’ 1521 maintained less than 10% spp. densities present roots most susceptible genotype, while all 36 infection, evaluated two follow-up glasshouse experiments terminated 56 days after inoculation ca. 1000 eggs second-stage juveniles (J2) per seedling, varied substantially for final population density (Pf), reproduction factor (Rf) relative percentage susceptibility (%S). ‘PRF-GCI7’ resistant reference ‘LS 5995’ had Rfs < 1 both experiments, despite higher minimum maximum temperatures recorded second experiment. Continuous evaluation their pests use reduce such species producer’s fields are crucial enable sustainable crop production, contribute towards food provision security.