Usefulness of intercrops in management of African Bollworm, Helicoverpa armigera Hubner in chickpea, Cicer arietinum L. in Ethiopia
2014
Singh, S. K.
Field trial was conducted to study the effect of intercropping in chickpea, Cicer arietinum L. with eight different crops viz. wheat, barley, lentil, linseed, rapeseed, coriander, garlic, African marigold against Helicoverpa armigera. Each intercrop was sown in randomized complete block design with three replications. Observations were collected on number of eggs and larvae/10 plants, per cent larval parasitization, per cent pod damage and ultimately yield (Kg/ha). Results of two years study revealed that chickpea + African marigold was found to be the most effective treatment in reducing egg laying and larval population followed by chickpea + rapeseed. The maximum per cent of larval parasitization by Campoletis chlorideae was observed in chickpea + coriander followed by chickpea + linseed, however, it was minimum on intercrops i.e. wheat and rapeseed. Pod damage was significantly reduced in treatments, chickpea intercropped with coriander and African marigold by 83.05 and 64.96 per cent, respectively, over chickpea as sole crop. The highest yield was recorded in chickpea + coriander followed by chickpea + African marigold among the different tested treatments. Chickpea intercropped with lentil, garlic and linseed gave minimum yield which was lower than check (chickpea sole).
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