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Crop Protection :: Coffee
White stem borer: Xylotrechus quadripes

Symptoms of attack and nature of damage

  • Larvae enter into the hardwood and make the tunnels may extend even into the roots.
  • Tunnels - tightly filed with the excreta of the grubs.
  • Infested plants show visible ridges around the stem.
  • Yellowing and wilting of leaves.
  • Young plants (7 to 8 years old) attacked by the borer may die in a year


Identification of the pest

  • Adult - slender, long beetle (2.5 cm).
  • Forewings are black with white bands.
  • Males are generally smaller than females.
  • Head Shows distinctly raised black Ridges and the Hind Leg Femur extends beyond the apex of the Elytra
  • In the Female,the Black Ridges on the Head are not much conspicuous and the hind leg Femur does not extend beyond the apex of the Elytra


  • Maintain optimum shade on the estates.
  • Trace the infested plants - flight periods (i.e, during March and September)
  • Every year - looking for ridges on the main stem and thick primaries.
  • Collars prune the infested plants, uproot and burn the affected parts.
  • Remove the loose scaly bark of the main stem and thick primaries using coir glove or coconut husk – kill the eggs
  • Scrubbing during flight periods - kills the eggs and grubs present in the bark region.
  • Deep scrubbing should be avoided (sharp implement may injure the green wood and eventually kill the plant)
  • Spraying the main stem and thick primaries with neem kernel extract may afford good control of the pest.
  • Field release of predators Apenesia sps for effective control of white stem borer
  • Field release of white muscardine fungus Beaveria bassiana (2.5 % field infection reported)
Head - Male Head - Female
Beaveria bassiana - infection

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