Management of Spotted Stem Borer, Chilo partellus (Swinhoe) in Maize Crop through Augmentative Releases of Cotesia flavipes (Cameron) in Bihar

摘要

The management of spotted stem borer of maize Chilo partellus through augmentative releases of the parasitoid Cotesia flavipes was conducted at Dr Rajendra Prasad. Central Agricultural University, Pusa, Bihar during Kharif 2014, 2015 and 2016. Cotesia flavipes (Cameron) was the dominant natural enemy of Chilo partellus (Swinhoe) in maize fields of Bihar agro - climatic condition and its maximum parasitization was 57 per cent. In the augmented experimentation lay out, the maximum natural infestation of Chilo partellus and its parasitoid was as 41.21 per cent during last week of September and 42.30 per cent during second week of November, respectively. In the augmented maize field, the maximum infestation and parasitization were found as 11.36 and 51 per cent, respectively.