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Learn Economic Entomology with Rahul

Banana rhizome weevil (Cosmopolites sordidus, Cucurlionidae, Coleoptera)

Damaging stage :- Grub , adult

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Cosmopolites sordidus - Wikipedia

Damaging Symptoms:-

  • Adult on pseudo stem and grab on rhizome .
  • Failure of appearance of new
  • Sick appearance and yellow line on the top leaves.

 

Identification :-

  • Egg: – Hole in rhizome at ground
  • Larva: – Creamy white, leg less, wrinkle and spindle
  • Pupa:- Inside either stem or corn .
  • Adult:- Black or dark brown ,elytra covers abdomen dorsally .

 

Life cycle :-

Egg —-7-14 days–> larva –4-6 week–> Pupa —1-2 week–> Adult

 

Management :-

  • Similar to banana pseudo stem

 

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