Efficacy of Steinernema riobrave against Agrotis ipsilon Hufnagel (Lepidoptera: Noctuidae) on Potato

To know the performance of entomopathogenic nematode, Steinernerna riobrave (Indian isolate) against cutworm on potato crop, a preliminary field study was carried out during 2002–03. In the field, there were about 5 larvae of Agrotis ipsilon per waste heap before spraying. At the end of the experiment, number of larvae per waste heap were reduced up to 2.33, 1.50 and 1.17 in entomopathogenic nematodes (EPN) (100,000 IJs/m2), endosulfan 35 EC (0.07%) and farmer's practices respectively. Significant reduction in plant damage in EPN treatment (10.92%) over control (28.29%) was observed on 61hday of treatment.