Standardization of height and density of pheromone traps for mass trapping diamond back moth, Plutella xylostella (L.) in cabbage

Abstract

Investigations were conducted to standardize the height and density of Wota-T™ pheromone traps for mass trapping diamond back moth in cabbage. The results showed that maximum numbers of DBM moths were trapped at heights between 0.1 to 0.4 meter above the ground, the trap density being 24 traps/ ac. The relationship of moth catches in traps and DBM infestation on plants showed that the number of larvae and pupae was less (0.94 larvae and 0.45 pupae per plant) in fields where 24 traps /ac were installed.