Coconut

Rodent Management


Blackrat - Rattus rattus

  • It is the most common rat and the most common rodent found throughout the country.
  • The sub-species of this rat, R.r.wronghtoni and R.r.rufescens are known to cause damage to coconut.

Damage

  • A typical rat damage to tender coconut consists of a small hole of about 5 cm diameter near the stalk region.
  • The rat after gnawing the husk consumes the inner contents including the soft shell of the nut and such damaged nuts usually remain on the bunch for a further period of 2 to 6 days.
  • The fallen nuts are seen around the base of the palm. Three to six month old tender nuts are mostly preferred.
  • Many rat species are found in the coconut garden of which some are Tatera indica, Bandicota bengalensis and B.indica. Other rodents include squirrels, Funambulus tristriatus, E. palmarum, Sciurus sp., Porcupine Hystrix indica, palm civet Paradoxurus hurmaphroditus

Management

  • Use of poison bait or multiple dose anticonglants viz., warfarin and fumarin cakes.
  • Use of single dose anticoagulant rodenticide bromodiolone 0.005% cake.

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Tamilnadu