FEEDING PREFERENCE AND DAMAGE POTENTIAL OF HELICOVERPA ARMIGERA (HÜBNER) ON DIFFERENT PROMISING COTTON GENOTYPES/HYBRID

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KUMAR S.; SAINI R.K.

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Journal Paper

Paper Information

Journal: JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST) Year:2008 | Volume:10 | Issue:5 Page(s): 411-420

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Title

FEEDING PREFERENCE AND DAMAGE POTENTIAL OF HELICOVERPA ARMIGERA (HÜBNER) ON DIFFERENT PROMISING COTTON GENOTYPES/HYBRID

Author(s)

KUMAR S. | SAINI R.K. | Issue Writer Certificate

Keywords

COTTON GENOTYPES

DAMAGE POTENTIAL

FEEDING PREFERENCE

HELICOVERPA ARMIGERA

Abstract

The larval FEEDING PREFERENCE and DAMAGE POTENTIAL of HELICOVERPA ARMIGERA (Hübner) on promising COTTON GENOTYPES/hybrid were studied during 2004 under laboratory and field conditions at CCS Haryana Agricultural University, Hisar, Haryana, India. Third and fifth instar larvae were allowed to feed on different types of fruiting body (squares, flowers and young bolls) of various genotypes/hybrid in the laboratory to determine the relative FEEDING PREFERENCE by the larva. For studying DAMAGE POTENTIAL, the larvae were allowed to feed individually up until pupation on a single or all types of fruiting body of different genotypes/hybrid, both under laboratory and field conditions. The mean number of fruiting bodies damaged by a larva was determined. The results indicated that the arboreum genotypes (HD-123 and HD-324) and the hirsutum genotype, H-1226, were preferred by neither third nor fifth instar larvae for feeding. The order of preference of the remaining genotypes/hybrid was HS-6> H-1117> HHH-223 (hybrid)> H-1098 with respect to third instar and HHH-223> H-1098> H-1117> HS-6 for fifth instar larvae. Among different fruiting bodies, the third instar larvae exhibited greater preference for flowers while the fifth instar for young bolls, irrespective of genotypes. Under laboratory conditions, a larva damaged more squares, followed by flowers and young bolls. Larvae caused significantly greater damage to fruiting bodies in the arboreum than the hirsutum genotypes/ hybrid during the course of development. The hybrid generally recorded significantly lower square and boll damage. Under field conditions, a larva from hatching till pupation required on average 9.00 squares, 7.88 flowers or 4.20 bolls of H-1098 when restricted to feeding on a single type of fruiting body but 1.25 squares, 2.75 flowers and 2.12 bolls when all types of fruiting bodies were available to.

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