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NPV Symptoms on Gram pod borer( Helicoverpa armigera) larva.

 NPV Symptoms on Gram pod borer

( Helicoverpa armigera)

Insects become dull in colour, feeding rate is reduced and larvae become pinkish white especially in the ventral side due to accumulation of polyhedra. In advanced stage larvae become flaccid the skin becomes very fragile and eventually rupture. Diseased larvae hang upside down from the plants. This is called tree top disease or Wipfelkrankeit .

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Please note that this is the opinion of the author and is Not Certified by ICAR or any of its authorised agents.