Seasonal incidence of Calopepla leayana Latr. (Coleoptera: Chrysomelidae) on Gmelina Arborea and its management in Arunachal Pradesh

The incidence of Gmelina defoliator, Calopepla leayana Latr. was studied on Gmelina arborea Roxb. during 2011 and 2012 at Pasighat, Arunachal Pradesh. The incidence was low during winter and gradually increased from March with highest infestation being during June to September. The activity of hibernating beetle started in March-April and increased as climate warmed up. The infestation exhibited positive correlation with rainfall, RH, maximum and minimum temperature. For its management, among biopesticides, Melia azedarach fermented leaves’ extract was the best and was on par with cypermethrin and chlorpyriphos.