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Annals of Plant Protection Sciences
Year : 2008, Volume : 16, Issue : 2
First page : ( 320) Last page : ( 324)
Print ISSN : 0971-3573.

Effect of Intercropping on Helicoverpa armigera (Hüb.) infesting Chick pea

Pandey Renu*, Ujagir Ram

Department of Entomology, College of Agriculture, G.B. Pant Univ. of Agri. & Tech.,Pantnagar - 263 145, India.

*E-mail: rpento82@yahoo.co.in

Abstract

Field trial was conducted to determine the effect of coriander, linseed and barley as intercrop in chick pea on Helicoverpa armigera incidence and yield during rabi season. In general, all the intercrops viz. barley, linseed and coriander were found to be effective in reducing the egg count and larval population. Overall, mean number of egg count varied from minimum of 17/m2 in chick pea + coriander (2:1) and chick pea +barley (4:2) to the maximum of 37.7/m2 in chick pea sole crop. The reducing effect of intercropping on egg count was more pronounced when chick pea and coriander were grown in the row ratio of 2:1. This suggested that both egg and larval count of H. armigera could significantly be reduced if chick pea was intercropped with coriander in 2:1 ratio. The highest pod borer damage (90.6%) was recorded in chick pea sole crop, which was significantly suppressed with the introduction of intercrops. Mean equivalent grain yield in intercropping combinations ranged from maximum of 886.8 kg/ha in chick pea + coriander (4:2) to minimum of 188.9 kg/ha in chick pea sole crop.

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Key words

Cicer arietinumHelicoverpa armigera, Intercropping.

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