Symptoms of Damage
| 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. |
- 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.
Young larva
Adult
Pink bollworm - Damage
Economic threshold:
- ETL: 10% infested fruiting parts or 8 moths/trap
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.