Panjab University Research Journal (Science)
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EXPLOITATION OF FIELD EGG PARASITOID USCANA FEMORALIS PAJNI AND SOOD FOR THE CONTROL OF STORE PEST, CALLOSOBRUCHUS MACULATUS (F.)

*P.K. Tewari, N.K. Mavi and M. Airi

Department of Zoology, Panjab University, Chandigarh - 160 014

*Corresponding author :ptewari01@hotmail.com


Abstract
Uscana femoralis Pajni and Sood, an egg parasitoid of field bruchid pests has been made to adapt to the eggs of Callosobruchus maculatus (F.), a serious pest of stored legumes. The parasitoid lays its egg within the egg of the host, and completes its development on an average in 9 days at controlled conditions of 28±1°C and 78%R.H. The maximum individuals emerge during the first two days of emergence. The male and female sex ratio is 1: 4.8. The adults copulate within 1-2 hours after emergence. The parasitoid prefers freshly laid eggs of the bruchid for oviposition. On an average 45.86 eggs with a maximum of 72 eggs and minimum of 31 eggs are laid by a mated female. The average developmental mortality of the parasitoid is 4.2%. The males live longer than females with an average longevity of 2.47 and 1.4 days respectively.

Key words: Uscana femoralis, Egg Parasitoid, Biological Control, Store Pest, Callosobruchus maculatus

 


 
 
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