Spotted bollworms

Spotted bollworms: Earias vittella, Spiny bollworm: Earias insulana

Symptom of damage

  • Drying and drooping of terminal shoots during pre-flowering stage
  • Shedding of squares and young bolls
  • Flaring up of bracts during square and young boll formation stage
  • Holes on bolls and rotting of bolls.

Identification of the pest: E. vitella

  • Larva- Brownish with white streaks dorsally and pale yellow ventrally, Without finger-shaped processes


  • Small buff coloured
  • Forewings are pea green with a wedge-shaped white band running from base to out margin

Identification of the pest: E. insulana

  • Larva- Brown with dorsum showing a white median longitudinal streak. The last two thoracic segments and all the abdominal segments have two pairs of fleshy tubercles (finger-shaped processes) one dorsal and the other lateral
  • Pupa – Brown and boat-shaped
  • Adult – Small buff coloured. Forewings are uniformly silvery green.



  • ETL: 10% infested shoots / squares / bolls
  • Spraying any one of the following insecticides
  • Carbaryl 5% DP 20 kg/ha Phosalone 35% EC 1714ml/ha
    Chlorantraniliprole 18.5% SC 150 ml/ha Profenofos 50% EC 1500-2000 ml/ha
    Flubendiamide 39.35% SC 100-125 ml/ha Triazophos 40% EC 1500-2000 ml/ha
    Indoxacarb 14.5% SC 500 ml/ha

Biological control:

  • Bacillus thuringiensisserovarkurstaki (3a, 3b, 3c) 5%WP 750- 1000 g/ha.



  • TamilNadu Agritech Portal.


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