2012•Journal of Entomological ResearchRequires access

Use of Trichogramma species as potential biological control agents against sunflower headborer, Helicoverpa armigera Hübner

Arvind Kumar, Khan

Abstract

Among the four species evaluated for egg parasitization of H. armigera, Trichogramma chilonis lshii showed the highest percentage of egg parasitization of 83.75% followed by T. pretiosum (68.90%), T. brassiliensis (66.09%) while lowest parasitism was observed in T. poliae (44.99%). the maximum percentage parasitism of 85.27% was observed in the plot where T. chilonis was released @ 1,50,000 eggs/ha. the highest seed set (85.35%) and yield (1.62 tons/ha) was attained in the plots where T. chilonis was released @ 1,50,000 eggs/ha.

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Key concepts: Helicoverpa armigera, Parasitism, Trichogramma, Sunflower, Biology, Biological pest control, Forensic science, Veterinary medicine