Screening of sugarcane genotypes against sugarcane woolly aphid, Ceratovacuna lanigera

Studies were conducted to evaluate the effect of morphological characters of plants on the infestation of sugarcane woolly aphid in different sugarcane genotypes. Among the 15 genotypes evaluated during 2005 -07, the leaf width exhibited significant positive correlation (r=-0.52**) with SWA grade. Cane weight (r= -0.72**) and pole per cent (r= -0.54**) had significant negative correlation with pest grade. Genotype Co 91010 was found to be highly resistant in recording lowest pest grade and SWA density, whereas Co 2000 -06 was recorded as resistant. The genotypes Co 92020 and Co 91013 were highly susceptible to the pest infestation. Co 91010 recorded highest cane yield (85.99 t/ha), which was on par with commercial grown genotypes.