Oviposition responses of Helicoverpa armigera towards the morphological plant characters of some genotypes of cotton

Oviposition responses of helicoverpa armigera were studied in different genotypes of cotton in relation to plant characters viz.,trichome density,trichome length and gossypol glands from midrib,veins and leaf lamina,moisture contents and thickness of leaf lamina during 2003 and 2004. significant variations were observed in oviposition. maximum number of eggs from upper portion of ten plants was observed from fs-628 which was 23.10,while minimum number was 8.46 which was recorded from s-12. all the characters were negatively correlated with the oviposition,except trichome length on leaf lamina having the correlation coefficient of 0.575. trichome density on leaf lamina,thickness of leaf lamina and gossypol glands on leaf lamina had significant but negative correlation having the correlation coefficient of -0.783,-0.688 and -0.858,respectively. © 2012 zoological society of pakistan.