摘要：Previous research has defined "aggregate pesticide expenditures" as the control variable;however, virtually all managerial recommendations and environmental restrictions target specificpesticides, rates, and crops. A bioeconomic approach considering particular pesticides onspecific pests and crops is recommended for managerial-policy applications and testing forincreasing returns. Exponential weed control and seven popular yield damage functional formswere estimated for a bioeconomic weed control model for winter wheat in Washington. Concavity with respect to herbicide rate was observed for most popular damage functions atnormal weed densities and manufacturers' label rates, but convexity existed outside these rangesand should be checked.
关键词：bioeconomic; data aggregation; herbicide; increasing returns; pest control; pesticide;weed control
