White Grub

White Grub: Holotrichia consanguinea


  • Yellowing and wilting of leaves.
  • Drying of entire crown.
  • Affected canes come off easily when pulled.
  • Cause extensive damage to roots and base of the shoot.
  • Affected canes show lodging in the field.
  • Damages can be seen more in ratoon crop when compare to plant crop


Identification of pest:

  • Egg: A female lays on an average of 27 eggs in the soil, which is pear like and enclosed in earthen cells.
  • Grub: Fleshy ‘C’ shaped, whitish yellow in colour found close to the base of the clump.
  • Pupa: Pupae are tan to brown, and occur deeper in the soil in earthen chambers.
  • Adult: Adult beetles are a rusty-red colour just after emerging from the pupal stage, but turn nearly black.



Cultural method:

  • Provide adequate irrigation.
  • Deep ploughing immediately after harvesting.
  • Avoid ratoon cropping
  • Stagnating water for 24hrs in the field then the grub will come out from the soil

Physical method:

  • Collect and destroy the adult beetles, harbouring in nearby Neem, Ailanthus, and Acacia trees immediately after the summer showers using powerful petromax lights as a mass campaign in areas near to forest and hilly regions.

Biological method:

  • Apply Beauveria brongniortii @ 2.5 kg/ha (1*109 cfu/g) entopathogenic fungal formulation along with FYM at the time of planting in endemic regions.



  • TamilNadu Agritech Portal
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