GWM - GENERAL WEED MANAGEMENT MODEL

GWM is a decision support system designed for evaluating soil-applied and post-emergence weed management options in row crops. It has a gene ral structure to allow use with different crops. The system consists o f a simulation model, databases, and a database management module. The simulation model has a set structure for linking processes of weed po pulation dynamics during a single season, but allows flexibility in ho w each process is modeled Databases store model parameters, informatio n about management options, and field-specific simulation inputs. The database management module allows a user to specify entirely the simul ation model or modify existing versions without programming. GWM has b een parameterized to evaluate weed management as in two existing model s (WEEDSIM and WEEDCAM) and for dry bean production. The structure of GWM and associated databases appears to capture essential aspects of w eed biology influencing management decisions. GWM can be enhanced as k nowledge of weed biology and ecology is refined.