Castor Semilooper

Castor Semilooper:  Achaea janata, Paralelliaalgira

Symptoms of damage:

  • Damage to complete defoliation 

Identification of the pest: 

Achoea janata:

  • Larva: semilooper with varying shades of colour with black head. Abdomen has a red spot on the third abdominal segment and red tubercules in the anal region
  • Adult: pale reddish brown moth with hind wing having white spot in the middle and three large white spots on the outer margin 

Paralellia algira:

  • Larva: semilooper, olive grey colour with numerous longitudinal lines
  • Adult: Forewings are white in colour with suffused band beyond it, Hindwing has white median band, the outer margin grey at centre


  • Spray any one of the following insecticides thrice from flowering at three weeks interval
    • Malathion 50 EC 2.0 l/ha
    • Carbaryl 50 WP 2.0 kg/ha in 1000 l of water
    •  Apply neem seed kernel extract 5%+Neem oil 2%.



  • TamilNadu Agritech Portal.
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