In a series of surveys on fungal diseases of rice insects in general and leaffolder in particular during the 1996 samba season (October through February) at Annamalainagar, 40% of the rice grasshopper ( Hieroglyphus banian [F.]) population was found to be infected with a fungal pathogen.
Nymphs and adults were diseased. The cadavers were dull and brownish yellow and were seen holding the rice culms with their legs, with the insects’ heads pointing toward the shoot tips (see figure). Abundant mycelial growth was observed at the intersegmental regions of the thorax and the abdomen but not the head capsule. On continued exposure to sunlight, the cadavers dried and the fungal matrix withered off.