A synthetic yield loss simulation model for rice pests was developed recently (Willocquet et al 1998) as a tool for setting research priorities and improving pest management. This model is production situation (PS)-specific and addresses several rice pests. It has been tested in several Asian PSs (e.g., in the Philippines and Vietnam), where it simulates attainable rice crop growth adequately as well as losses caused by various pests (diseases, insects, and weeds) (Willocquet et al 1998).
This work aimed at further testing of the model under a wider range of PS. The PSs and injuries addressed here were defined based on characterization of rice injury profiles and PSs across tropical Asia (Savary et al 1998). The first PS, PS2, is a reference used in all experiments. Two other PSs (PS8 and PS9) represent those prevailing in Uttar Pradesh (Savary et al 1997).