Dang Thanh Ho. 1986. Damage and yield loss caused by stem borers in irrigated rice in Kenya. Tropical Agriculture (Trinidad and Tobago) 63: (2): 201-204.

Results of damage simulation and artificial infestation with Maliarpha separatella indicated that the pre-flowering stage was most susceptible to borers. Protection by Furadan at 1.2 kg ai/ha till flowering was the most economical. Yield loss was cumulative, with greater losses at higher levels of infestation. The economic injury level (EIL), that is the level of infestation where control is justified, was estimated at 10 % infested tillers.

Keywords: rice Oryza sativa, stalk-eyed fly Diopsis thoracica, D. apicalis, crop loss assessment