Department of Entomology, N.D. University of Agriculture and Technology, Kumarganj, Faizabad-224 229, Utdar Pradesh (India).
*Present address: Entomologist, Horticultural Experiments & Training Centre, Chaubattia-263 651, Ranikhet, Almora, Uttar Pradesh (India).
Prominent morphological characters of Brassica juncea L. germplasms, viz., non-waxy stem, pubescent leaf surface and hardy inflorescence manifested resistance in mustard to Lipaphis erysimi Kalt. On the other hand, waxy stem, smooth leaf surface and succulent inflorescence were the causes for susceptibility of Brassica germplasms. The resistant reaction of B-85 glossy and RW-White glossy was correlated with non-waxy stem of these two germplasms, whereas waxy-stem, smoothness of leaf surface and succulent inflorescence of Varuna, Kranti and PR-43 contributed for their susceptibility to L. erysimi In the case of RH-7847, resistance was correlated with hairiness of leaf surface. However, in the other germplasms, viz., NDR-8501, PR-8801 and PR-8805 none of the prominent morphological characters were identified as responsible for their moderate resistant reaction to L. erysimi.
