Chemical Control of Cone Worm, <I>Dioryctria abietella</I>, Infesting Cones of Silver Fir (<I>Abies pindrow</I>) by Systemic Insecticides

Abstract

Chemical control of cone and seed insect of Himalayan Silver fir (Abies pindrow Royle) was conducted by using systemic insecticides. Two methods were followed for insecticide application: (i) Drip line application in soil, and (ii) tree injection. Performance ofmonocrotophos @ 100ml per 20 cm gbh of a tree was found best, protecting 82.44% cones of Silver fir used as tree injection followed by drip line application in soil by thimet @ 100 g per 20 cm gbh where 75.76% cones were protected from the attack of cone worm, Dioryctria abietella