Journal of FARM SCIENCES, Vol 28, No 1 (2015)

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Role of intercrops for the management of chilli pests

Y.H. Sujay, R.S. Giraddi

Abstract


Field experiments were conducted at the Main Agricultural Research Station, College of Agriculture, Dharwad for two consecutive kharif seasons of 2009 and 2010 to know the effect of different intercrops for the management of chilli pests. Among the different intercrops tested, chilli intercropped with coriander and onion performed well by recording lowest population of sucking pests, leaf curl index, larval population of Helicoverpa armigera (Hubner) and fruit damage. Whereas, highest pest population of aphids, thrips and mites, leaf curl index, larval population of H. armigera and fruit damage was observed in sole chilli crop. Pooled yield data revealed that, the treatment chilli intercropped with coriander recorded highest dry chilli yield of 3.86 q/ha and it was on par with treatment, chilli + onion (3.54 q/ha) whereas, intercrop yield was significantly highest in chilli + onion (15.56 q/ha) followed by chilli + soybean (9.99 q/ha). Among the different intercrops, highest net returns (` 70,709/-) with BC ratio of 1:5.45 was recorded by chilli + onion, followed by chilli + coriander (` 51,207/-, BC ratio - 1: 4.57) and chilli + onion + cotton (` 43,671/-), whereas sole chilli recorded lowest net returns of ` 4,485/- with BC ratio of 1:1.39. Predators were found greatly distributed in the crop having different intercrops. Chilli intercropped with coriander and onion supported good activity of the predators viz., coccinellid beetles, Menochilus sexmaculatus F. and chrysopids, Chrysoperla zastrow sillemi (Esben-Peterson). It appeared that growing intercrops in between the main crop was found advantageous in the management of chilli pests complex besides yield benefits.

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