7Krishnaiah, K. Rao, C. S. & Rao, N.V. 1987. Sequential sampling plans for rice gall midge, Orseolia (Pachydiptosis) oryzae Wood. Mason Mani. Indian Journal of Entomology, 49(2):230-237.
8Rao, N. V., Rao, B. H. K. M. , Rao, V. L. V. P.&. Reddy, R. S. 1990. Economic invury levels for rice gall midge and yeltow stem borer, Indian Jou rnal of Entomology, 52 ( 3 ) : 445 - 451.
9Rao, P.S.P. 1987. Tolerance of some rice varieties for gall midge (GM) Orseolia oryzae Wood.Mason. International Rice Research Newsletter, 12(4) t 16- 17.