insectifuge

例句：

1. 1. The insectifuge was effective in controlling the population of locusts.
   这种昆虫杀手在控制蝗虫数量方面非常有效。
2. 2. The farmers used a pesticide to kill the harmful insects that were damaging their crops.
   农民们使用杀虫剂来杀死那些损害他们庄稼的有害昆虫。
3. 3. To prevent the spread of disease, we need to use an insectifuge on our lawn.
   为了预防疾病的传播，我们需要在我们的草坪上使用一种昆虫杀手。