有人认为农药的毒性越大,杀虫(或防病)效果也就越好。于是购买农药愿买高毒的,病虫高发时也愿意用巨毒农药。其实,农药的毒性是指对人、畜和有益生物(包括天敌)所产生的毒害。而效力则是指农药对病虫草鼠的杀灭能力。所以农药的毒性与效力是两个概念。有些农药的毒性与效力是一致的, Some people think that the greater the toxicity of pesticides, insecticidal (or disease prevention) effect is better. So buy pesticides willing to buy highly toxic, high incidence of pests are also willing to use huge poison pesticides. In fact, the toxicity of pesticides refers to people, livestock and beneficial organisms (including natural enemies) produced by the poison. Effectiveness refers to the ability of pesticides to kill pests and worms. Therefore, the toxicity and effectiveness of pesticides are two concepts. The toxicity and potency of some pesticides are the same,