Crop blight has menaced man since the beginning of agriculture, and the invention of pesticides in the 19th century soon found widespread acceptance.
人類自從懂得大量種單一作物，蟲害就一直是農民最大的敵人。要抓，抓不完；不抓，又沒有別的辦法。所以十九世紀發明農藥以後，立刻大受歡迎，至今農民對它的依賴已根深柢固。