author(s)
Hossain Ali Mondal

abstract
Dolichos lablab served as an excellent compatible host for aphid colony establishment in vine/twig region. In the present research, it was observed that aphid colony establishment was significantly higher in higher diameter (HD) vines as compared to lower diameter (LD) vines within the same genotype. In addition to, the HD leaf petiole as well as HD stems also supported significantly higher aphid population establishment as compared to lower diameter (LD). The aphid population establishment within LD vine in different segment of 10 cm from tip having significant vine diameter was not significantly different. Characteristically, within HD vines, the aphid population in different segment of 10 cm from tip having significant vine diameter was significantly different. This characteristic modulation of differential aphid colony establishment in vine, stem, petiole and leaflet’s vein within the same genotype was correlated to diameter variation. The HD-specific facilitation promoted aphid population establishment in HD-vine, stem, leaf petiole and leaflet’s vein. This information may be the first report that the vine/twig diameter benefited aphid colony establishment.