Relative resistance/susceptibility of ten promising sugarcane varieties i.e. BF158, BF159, CPF(HF) 160 and 161, BF 162, BF163, BF164, BF165, BF166 and BL4 to top borer (Scirpophaga nivella F.) and stem borer (Chilo infuscatellus Snell.) was evaluated during 1983-84 between mid to mid August at fortnight intervals on ch sown and ratoon crops, respectively. All the varieties obtained similar borer damage. But they showed significant difference and interaction in borer incidence and time of its assessment. Variety CPF(HF) 160 was more resistant to borer attack during both years. BF166 was the highest cane yielder.