Field Evaluation of Different Soybean Genotypes against Stem Fly Melanagromyza sojae (Zehntner)

Infestations in the early crop growth stages cause high seedling mortality and thus reduce the crop stand. Infestations during later growth stages do not kill the damaged plants, however, they may significantly affect the yield-attributing characters of the plant, e.g. reduction in plant height, number of branches per plant, number of trifoliate leaves, leaf area per plant and dry matter accumulation. The present study aimed to evaluate different soybean genotypes against stem fly Melanagromyza sojae (Zehntner). The study was carried out during Kharif 2022–2023 at the Research Cum Instructional Farm Indira Gandhi Krishi Vishwavidyalaya in Raipur (C.G.). In the present study, total thirty-six soybean genotypes were screened against stem fly, Melanagromyza sojae (Zehntner). Onthe basis of per cent tunnel damage, out of thirty-six genotypes, Viz. NRC-190, PS-1670 were found under highly resistant category, whereas four genotypes under the resistant category, twelve genotypes under moderately resistant category and eleven genotypes were placed under least resistant category, remaining six were placed under the susceptible and one under the highly susceptible category.In terms of plant infestation PS-1670 genotype recorded the minimum infestation and DSLB-1 recorded the maximum infestation. The highest grain yield was produced by the genotype PS-1670, while the lowest grain yield was produced by the genotype DSLB-1.