Studies on biological control of pigeonpea pod borers in India
1994
Santharam, G. (Tamil Nadu Agricultural Univ., Coimbatore (India). Dept. of Agricultural Entomology) | Victoria, D.R. | Rabindra, R.J. | Jayaraj, S.
Results of two field experiments, one on SA 1 pigeonpea under rainfed and the other on Co.5 pigeonpea under irrigated conditions revealed that Bacillus thuringiensis var. kurstaki (B.t.k.) (Delfin), its combinations with nuclear polyhedrosis virus of Heliothis armigera and Chrysoperla carnea were as effective as endosulfan in reducing the pod borers, Heliothis armigera and Exelastis atomosa. However, B.t.k. 1.25 kg + endosulfan 175 g/ha or B.t.k. 2.5 kg + HaNPV 250 LE/ha gave better control of damage to flowers and pods than B.t.k. applied alone on SA 1 pigeonpea. The yield differences between these treatments were not significant. A combination of HaNPV 250 LE/ha + endosulfan 175 g/ha was superior than B.t.k. A similar trend was seen on Co.5 pigeonpea. Release of the second instar larvae of C. carnea 1 lakh/ha was not effective in increasing the yield of pigeonpea
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