Efficacy of biopesticidies against Helicoverpa Armigera on chickpea (Cicer Arietinum)
2000
Than, M.Logana | Babu, P.C.Sundara | Balasubramanian, G. (Tamil Nadu Agricultural University, Coimbatore (India). Central for Plant Protection Studies)
In order to evaluate the efficacy of SPICTURIN(R) (Bacillus thuringiensis var. galleriae) and HaNPV against H. armigera on chickpea, two field experiments were carried out at Kurumpapalayam and Saravanampatti in Coimbatore district during summer 1997. In both the field trials, chlorpyriphos @ 1.00 1/ha proved its superior efficacy in recording the lowest larval population and pod damage followed by Spicturin @ 2.00, 1.50 and 1.00 1/ha each combined with HaNPV three and seven days after each spray and also at harvest. The highest pod yield was recorded in chlorpyriphos @ 1.00 1/ha followed by Spicturin @ 2.00 1/ha ha+HaNPV which were on par as against in untreated check. The cost: Benefit ratio was higher in chlorpyriphos 1.00 1/ha (1:3.50) followed by HaNPV @ 1.5x1012 POB/ha individually (:3.32), Spicturin @ 1.00 1/ha (1:2:18) and Spicturin @ 1.00 1/ha+HaNPV (1:2.07).
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