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Abstract : |
Experiments were conducted to record the larval population and damage caused by Helicoverpa armigera on four cotton cultivars viz., NIAB-krishma (V1), FH-900 (V2), CIM-446 (V3) and BH-118 (V4), sown on four different dates, viz., 25-April (D1), 10-May (D2), 25-May (D3) and 9-June (D4). Mean population and damage caused by the larvae of first generation of H. armigera was non significant for all the cultivars. While, it was found significant, when recorded in relation to sowing dates. Interaction between plant genotype and sowing dates showed that early planting dates supported the high larval population and percent fruit injury by H. armigera on each of the cultivar. , |
