F.F. Sanchez, N. M. Esguerra, C. G. Balingit. 1968. Rates and timing of Accothion and Ambithion high-volume sprays and granular applications of several insecticides in the control of stemborers and other insects affecting rice. Philippine Agriculturalist 52(6):384-392. Key words: Rice, stemborer, insecticide efficacy, chemical control, application frequency, dosage yellow rice stem borer Scirpophaga incertulas, rice whorl maggot Hydrellia philippina, Philippines, insecticide granules applied as paddy water broadcast