Symptoms of damage:

• Whitish patches due to scrapping of epidermal leaf tissues by young larvae
• The leaves give a withered appearance but in later stages larvae bore holes in the leaves
• It also bores into pods and feeds developing seed
  
  

Identification of the pest:

• Larva: Yellowish green, with fine erect black hairs scattered all over the body 
• Adult: Small greyish brown adult having pale whitish narrow wings with yellow inner margins. Forewings have three white triangular spots along the inner-margin, triangular markings of opposite wings appear as diamond shaped. Hind wings have a fringe of long fine hairs

Management:

• Installing pheromone trap @5/ac. to monitor the moth activity
• Collection and careful destruction of the larvae at gregarious stage at least twice a week
• Conserve Cotesia plutellae, as it is an important parasitoid for diamond back moth. Diadegma insulare is also the most important parasitoid of the diamondback moth
• For control of grown up larvae apply 5% malathion dust @37.5 kg/ha