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Symptoms

  • The adult moth lays eggs in the mechanically damaged portions of the spadices (mostly caused by slug feeding) and the emerging caterpillars bore into the inside of the spadices
  • The caterpillars feed on the inflorescences especially the tender female flowers abd rachillae
  • They web together the rachillae into a wet mass with silken threads and take shelter in it
  • Spathe opening is delayed
  • Yellowing of spadices and presence of small holes with frass and drying on the spathe

Management

  • Digging and forking of the soil before and after the monsoon will help in eliminating the various developmental stages of the beetle
  • In case of severe attack, spray Dimethoate 30 EC (1.5 ml/ litre of water)