The studies on screening of 15 varieties wheat viz., WH 1105, 1124, 1142, 283, 542, 711, 1080, 1025, 157, DBW 17, DPW 62150, HD 2967, PBW 343, C 306 and 147 for ovipositional preference (choice no choice test), adult emergence grain damage (number weight basis both) by S. oryzae were carried out under laboratory conditions during August to October, 2017. Results revealed that the minimum ovipos...

Black vine weevils, Otiorhynchus sulcatus (Fabricius) (Coleoptera: Curculionidae), are globally-distributed polyphagous pests of many horticultural crops. We investigated how adult weevils were affected by host switching and, in particular, how host plant species nutritional and defensive chemistry affected subsequent host plant species selection and oviposition. Adults were fed one of three ho...

A brief description is given of Perkinsiella saccharicida Kirk. as a pest of sugarcane. Population fluctuations, varietal susceptibility, ovipositional habits, natural control, alternate host plants, alary polymorphism, light attraction and the effect on leafhoppers of trash burning are discussed.