Journal of FARM SCIENCES, Vol 31, No 4 (2018)

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Abundance of Helicoverpa armigera (Hubner) on different host crops

S. B. AND HONNAKERAPPA, S. S. UDIKERI

Abstract


The Helicoverpa armigera (Hubner) attack several economically important crops in India, including cotton,pigeonpea, chickpea, sunflower, maize, chilli, tomato and okra. The current study examined the relative abundance of H.armigera on different host crops within a crop mosaic. Field studies conducted during 2016-17 at the Agricultural ResearchStation, Dharwad farm indicated differences in egg and larval densities among the different host plant species. All of the hostcrops supported eggs and larvae of H. armigera, but the populations on chickpea (3.36 eggs/plant and 1.59 larvae/ plant)and pigeonpea (2.77 eggs/plant and 1.30 larvae/plant) were significantly higher than on cotton and other host crops. Thedamage caused by H. armigera larvae was highest in chickpea (18.02 %) followed by pigeon pea (17.42 %). Thus, in kharifpigeonpea and okra crops and in rabi season chickpea appeared to be the major host crops for H. armigera.

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