Abstract
Field trials were conducted in the Research Area, Directorate of Sugarcane, Ayub Agricultural Research Institute,
Faisalabad to study he physio-morphic characters of sugarcane resistance to the sucking pest Pyrilla perpusilla.
Twenty genotypes of sugarcane were tested for their resistance susceptibility against P. perpusilla, as a
preliminary screening experiment, during 2006. Based on the population-density count, 3 genotypes, viz., HSF240, CPF-243 and S-2002-US-114 showing resistance responses, 3 genotypes viz. CPHS-35, S-2003-US-394
and S-2003-US-623 showing susceptible trends and 3 genotypes viz. S-2003-US-809, S-2002-US-140 and S2002-US-104 exerting intermediate trends against the pest under test were selected for the final screening trials
during 2007.The genotype S-2003-US-623, was found to be comparatively susceptible; whereas, HSF-240,
showed resistance responses. The leaf-width and cane length showed a positive and significant correlation
whereas the leaf-spine density had a significant negative effect with pest-population. The Leaf-length and CaneDiameter did not show a significant correlation with the pest population.
