pests of coniferous trees

例句：

1. 1. The garden was plagued by aphids and spider mites.
   花园被蚜虫和蜘蛛螨虫所困扰。
2. 2. Pests are often the cause of crop failures.
   害虫往往是农作物失败的原因。
3. 3. The farmers were worried about the damage caused by the pests.
   农民们担心害虫造成的损害。