Effect of Varieties/Hybrids of Cotton on the Parasitization Efficiency of <I>Trichogramma chilonis</I> Ishii

J. S. Virk; K. S. Brar; A. S. Sohi

doi:10.18311/jbc/2004/4062

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Authors

J. S. Virk
Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab ,IN
K. S. Brar
Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab ,IN
A. S. Sohi
Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab ,IN

DOI:

https://doi.org/10.18311/jbc/2004/4062

Keywords:

Bollworms Complex, Cotton, Hybrids, Parasitization, Tricllogramma chilonis, Varieties.

Abstract

Six cultivars, namely, LD 327, LH 1556, Ganga Kaveri-151, Ankur 651, Dbaval-2 and LHH 144 were e,'aluated for testing efficacy of Trichogramma chilonis Ishii. T. chilonis was released 13 times during July to September at weekly interval @ 1,50,000 per ha. Four sprays of compatible insecticides were given during this period. The lowest bollworm incidence among intact fruiting bodies was recorded in LD327 (1.40%) which was on par with Ankur 651 (2.06%) and LHH144 (2.10%) but significantly lower than other cultivars. There was no significant difference in mean bollworm incidence among green bolls, parasitization, and seed cotton yield in various cultivars.