Hussain, T.Kumar, Ashok2017-08-042017-08-042010Kumar and Hussain, 2010http://krishikosh.egranth.ac.in/handle/1/5810027489Studies on the varietal preference of rice weevil, Sitophilus oryzae L. and its management in stored wheatInvestigation on “Varietal preference, life cycle and management of rice weevil, Sitophilus oryzae L.” was carried out in the Storage laboratory of the Department of Entomology, Rajasthan College of Agriculture, Udaipur during the year 2008. LOK-1 variety of wheat was least preferred host by S. oryzae while MP 1203 was most preferred host. LOK-1 and RAJ 3777 provided less percent grain damage with minimum loss in weight which may be result of hardness of the grains. The studies on the biology of rice weevil has shown that average growth index was observed 2.64. Adult longivity for male and female was 33.33 and 39.43 days, respectively. The management practices comprising of plant materials and inert dusts were used to over come the problem of S oryzae; diatomaceous earth (0.05%) exhibited an excellent treatment with respect to minimum percentage of grain damage as well as percent grain weight loss followed by black pepper powder (10g/kg) and Custard apple seed powder (10g/kg) of grain.ennullThesis