TY - BOOK AU - AMARJIT Lal TI - Studies on the biology of diamond back moth Plutella Xylostella (L.) (Lepidoptera : Plutellidae) on caulflower in the Punjab U1 - T 595.78 A45S PY - 1992/// CY - Ludhiana PB - PAU KW - PLUTELLIDAE KW - CAULIFLOWER -- PUNJAB -- DISEASES KW - ENTOMOLOGY KW - LEPIDOPTERA KW - PLUTELLA XYLOSTELLA BIOLOGY N2 - The eggs were minute. elongated and oblong and incubation period varied from 1B to 5.4 days. The egg hatchability was 25 to 95 per cent during different months. Larval period was 65 to 24.7 days. Larval survival varied from 20 to 80 per cent in different ER -