Field diagnostic symptoms

Defoliation, feeding damage on flowers and seeds.

Identification of insect pests

Eggs         : Round, yellowish and singly laid.

Larva        :  2” long, greenish with dark brown gray lines and dark and pale bands.  Chromorphism.

Pupa         : Obtect type, brown colour

Adult         : Forewing: brown colour with a ‘V’ shaped speck . Hindwing: White with dull black border

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                                          Larva                                                     Pupa                                            Adult                                                  

Management

• Application of nuclear polyhedrosis virus (NPV) at 3 x 1012 POB /ha in evening hours at 7 and 12 weeks after sowing.
• Set up sex pheromone traps at 12/ha.
• Conservation and augmentation of natural predators and parasitoids.
• Release of egg parasitioid, Trichogramma chilonis at 6.25 cc/ha