Effect of intercropping systems on gram pod borer Helicoverpa armigera hubner and its natural enemies in chickpea
2012
Pattar, P.S. | Mansur, C.P. | Alagundagi, S.C. | Karbantanal, S.S.
A field experiment was conducted during rabi 2005–2007 at Agricultural Research Station, Gangavati (UAS, Dharwad), to study the effect of different intercrops on growth and yield of chickpea. Pooled results indicated that sole chickpea (T₉) recorded significantly higher grain yield (1285 kg/ha) than other intercropped chickpea while, the lowest grain yield (597 kg/ha) was recorded in chickpea + wheat (T₇) intercropping system. Higher chickpea equivalent yield (1436 kg/ha) was recorded in chickpea + sunflower (T₂) intercropping while the lowest CEY was observed in chickpea + wheat intercropping (T7). Significantly lower pod damage was recorded in chickpea + sunflower intercropping system (19.50%) compared to sole chickpea. Sole chickpea recorded pod damage to an extent of 24.28% even after necessary prophylactic measures. The population of larvae reduced as the stage of crop advanced. Significantly lower number of larvae was observed in chickpea + sunflower intercropping system. Similarly the population of spiders and coccinellids were higher in this intercropping system compared to sole chickpea. Significantly higher gross return (Rs. 30458 per ha), net returns (Rs. 23117 per ha.) and B:C ratio (4.14) were recorded in chickpea + sunflower intercropping system.
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