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 .