Chemical control of the rice leaf roller Cnaphalocrocis Medinalis Guen

Abstract

A field trial was conducted in the Rice Research Station, Pattambi for four consecutive seasons in 1974-75 and 1975-76 with a view to study the relative efficiency of ten insecticides against the Rice Leaf roller Cnaphalocrocis medinahs. Leptophos, monocrotophos, ethyl parathion, quinalphos and dicrotophos applied at 0.25 kg a.i/ha and carbaryl applied at 0.5 kg a.i/ha were highly effective in checking the pest incidence.