R.K. PAREEK, ASHOK SHARMA AND K.C. KUMAWAT

Out of ten genotypes of coriander, Coriandrum sativum Linnaeus (RCr–41, RCr–20, RCr–435, RCr–436, RCr–446, RCr–684, UD–118, UD–480, UD–128 and Local) that were screened against aphid, Hyadaphis coriandri (Das), RCr–436 was found least susceptible; RCr–435. RCr–684, RCr–446 and UD–118 as moderately susceptible, RCr–41, UD–728, UD–480 and RCr–20 as highly susceptible; and Local as extremely susceptible. The morphological characteristics of the genotypes revealed positive significant correlation between the days taken for 50 per cent flowering and plant height. The biochemical constituents, viz., total phenols and volatile oil did not have any bearing on aphid population.