S. Kaur ¹, K. S. Brar ², M. Shehnmar ²

Affiliations
1 Farm Advisory Service Scheme (FASS) (PAU), Roopra Building, Garha Road, Jalandhar 144001, IN
2 Department of Entomo]ogy, Punjab Agricultural University, Ludhiana 141 004, Punjab, IN

Abstract

The extent of natural parasitism of Helicoverpa armigera (Hubner) by Campoletis chlorideae Uchida on different chickpea cultivars was studied at different locations in Jalandbar district of Punjab. The parasitoid population varied from 0.02-1.S0 cocoons per metre row length and the larval population ranged between 0.86-14.50 larvae per metre row length. The maximum numbers of cocoons were recorded on PBG S (0.88) followed by L SSO (0.74). The H. armigera population was also high on PBG S (9.38 larvae I m row length) followed by L 550 (6.75 larvael Ul row length).

Keywords

Campoletis chlorideae, Cocoons, Helicoverpa armigem, Larval Parasitization.

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S. Kaur ¹, K. S. Brar ¹, B. S. Sekhon ¹, N. Joshi ¹, M. Shenhmar ¹, J. Singh ¹

Affiliations
1 Department of Entomology, College of Agriculture Punjab Agricultural University, Ludhiana 141004, Punjab, IN

Abstract

Studies were conducted to assess tbe role of natural mortality factors in Helicoverpa annigera (Hubner) on chickpea in Punjab. The larval parasitoid Campoletis chlorideae Uchida bas been recorded as the most important mortality factor. Parasitism due to C. chlorideae ranged from 0.98 to 68.50 per cent throughout the crop season. The maximum parasitism was recorded during 3rd week of February, 1999 when the minimum mean temperatures and relative humidity were 11.9°C and 95 per cent, respectively. As C.chlorideae helps in suppressing tbe pest population both at vegetative and flowering! pod formation stage or the crop, it suggests that the conservation of C. chlorideae in chickpea is important.

Keywords

Campoletis chlorideae, Chickpea, Helicoverpa armigera, Parasitoid.

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