Exploring the ecological interplay: population dynamics of Ichneumon wasp (Xanthopimpla pedator F.) on the Raily ecorace of Antheraea mylitta D.

Abstract

This study provides a comprehensive examination of Ichneumon wasp damage on Raily Tasar silkworm cocoons in Chhattisgarh, offering critical insights into the prevalence and distribution of this parasitic infestation. These cocoons traditionally considered resistant to Ichneumon wasp infestations, but during the study, unexpected evident damage symptoms are exhibited during the First crop (Chaiti) harvests in June. The emergence of characteristic signs, including distinct holes at the peduncle base and pupal exit points, confirmed the presence of the Ichneumon wasp and its parasitic activity within the Raily cocoons. The investigation further revealed a notable range in the extent of Ichneumon wasp damage, with percentages ranging from 1.43 to 8.10 per cent across various forested locations in Bastar. District wise analysis indicated that Bastar experienced the highest damage rate (23.50%), followed by Kondagoan (20.50%) and Dhantewada (17.00%). These variations underscore the localized disparities in infestation severity, emphasizing the need for targeted interventions in areas facing higher damage rates.