soil insecticide

例句：

1. 1. The use of soil insecticides is essential for controlling pests in agriculture.
   使用土壤杀虫剂对于农业中控制害虫至关重要。
2. 2.The farmers used to spray soil insecticide on the crops to protect them from pests.
   过去农民们会喷洒土壤杀虫剂来保护作物免受害虫侵害。
3. 3.The soil insecticide was effective in killing the weeds that were threatening the crops.
   这种土壤杀虫剂在杀死威胁农作物的杂草方面非常有效。