2001年至2005年之间,美国用于除草剂的花费每年下降300百万美元,依据CropLife Foundation对除草剂的最新分析。然而,劳动力和燃料费用增加导致施用除草剂的成本增加了500万美元,且除草剂成本更高,使花费增加了312百万美元。因此,这一段时间杂草总成本上升了512百万美元,CropLif Between 2001 and 2005, the U.S. spent about $ 300 million on herbicides per year, based on the latest CropLife Foundation analysis of herbicides. However, an increase in labor and fuel costs has resulted in an additional $ 5 million in costs for the use of herbicides and a higher cost for herbicides, resulting in an increase of $ 312 million in expenditures. As a result, the total cost of weeds increased by $ 512 million over this period, CropLif