Journal of Biological Control

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Helicoverpa armigera (Hubner) larvae on chickpea were found to be parasitized by Apanteles sp., Diadegema fenestrale (Holmgren) and Campoielis chlorideae Uchida at Palampur, during two consecutive years. Among these, parasitization by the former two parasitoids remained negligible. However, the extent of parasitism by C. chlorideae ranged from 8.33 to 28.00 per cent. The parasitoid remained active from 2nd week of April to 1st week of May. Activity of the parasitoid ceased when the mean maximum temperature reached above 40°C and a significant positive correlation with total rainfall was observed. Multiple regression analysis revealed significant effect of relative humidity and total rainfall on larval parasitism, both individually as well as in association with other abiotic factors to the extent of 74.15 per cent.

Keywords

Campoletis chlorideae, Helicoverpa armigera, Parasitism, Parasitoids, Seasonal Incidence.
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