Rice earhead bug

Rice earhead bug: Leptocorisa acuta

Symptoms of damage:

  • Sucking the sap from individual grains, which are in milky stage.
  • Individual grains become chaffy
  • Black spots on the grains at the site of feeding puncture.
  • Buggy odour in rice field during milky stage

Identification of insect pest:

  • Egg: Are circular, brownish seed like 2mm long laid in clusters in two rows along the midrib on the upper surface of the leaf blade
  • Nymph: First instar is small, 2mm long, pale green in colour which grows to deepen green through different instars
  • Adult: Adults are greenish yellow, long and slender, above ½ inch in length with a characteristics buggy odour


ETL: 5 bugs/100 earheads at flowering and 16 bugs/100 earheads from milky stage to grain maturity

  • Dust any one of the following at 25 kg/ha twice, the first during
    flowering and second a week later:

    • Quinalphos 1.5 D
    • Methyl parathion 2% DP
    • KKM 10 D (The new KKM dust formulation consists of 10% of Acorus calamus rhizome powder and 90% of flash which is a waste product from Thermal Power Station)
  • Spray any one of the following twice as above
    • Malathion 50 EC 500 ml/ha
    • Neem seed kernel extract 5% 25 kg/ha
    • Notchi or Ipomoea or Prosopis leaf extract 10%



  • TNAU Agritech Portal


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