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Crop Protection :: Cash Crop :: Pest of Cotton

Pink bollworm: Pectinophora gossypiella

Symptoms of Damage

  • Rosetted flowers.
  • Excreta observed at the point of bore holes by larval feeding. .
  • Interlocular boring and formation of double seeds.
  • The attacked buds and immature bolls drop off. Discoloured lint and burrowed seeds.

Identification Characters and Biology

  • Destructive stage: Larva.
    Egg: Flat, laid singly on leaves, flowers, bolls. Egg period 4-20 days.
    Larva: Young larva are white and late instar becomes almost black, brown or green to pale or pink. Larval period: 25-35 days.
    Pupa: Pupation in soil and debris. Pupal period: 8-12 days.
    Adult: Small moth. Forewings are brown or dull yellow olive grey with dark spots. Hind wings margins are deeply fringed. Adult longevity: 7-10 days.

                                                                      
                                                                          

Pink bollworm - Damage

Economic threshold:

  • ETL: 10% infested fruiting parts or 8 moths/trap

 

Young larva

Adult

Integrated Management

  • Use pheromone traps to monitor the adult moth activity @ 5 / acre.
  • Spraying any one of the insecticides viz., Emamectin benzoate 5% SG 76 – 88 g/acre or Diflubenzuron 25%WP 120-140 g/acre or Chlorantraniliprole18.5% SC 60 ml /acre.
 

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