Comparative efficacy of synthetic insecticides and plant products against the incidence of pigeonpea pod borers
Field trials on the study of comparative efficacy of synthetic insecticides and plant products against the incidence of pigeonpea pod borers were conducted during 1994-1995 and 1995-1996 Kharif seasons in the Central Agriculture Research Station at Bhubaneswar. The study revealed the superiority of endosulfan 35% E.C. followed by acephate 75% S.P. and triazophos 40% E.C. each @ 0.5 kg a.i./ha in controlling the pod borers. Lower larval population was maintained in endosulfan (0.28. 08/plant), acephate, (0.91-3.61/ plant) and triazophos (0.28-3.08/plant), acephate, (0.91-3.61/plant) and triazophos (0.96-3.70/plant) treatments in comparison to other test insecticides and untreated control (1.09-26.73/plant). The effective control of pod borers was manifested with the marked increase in seed yields which were 1087.2, 878.0 and 805.8 kg/ha in endosulfan, acephate and triazophos treatments respectively as against 277.8 kg/ha in untreated control. The extent of yield increase in these three treatments were 190.1 to 291.4% over control.