scale insect

例句：

1. 1.These scale insects are known to be harmful to crops.
   这些尺蠖昆虫被认为对农作物有害。
2. 2. The scale insect is a common pest that can damage many types of plants.
   尺蠖昆虫是一种常见的害虫，可以损害多种植物。
3. 3. In order to control the scale insect population, farmers use chemical sprays.
   为了控制尺蠖昆虫的种群，农民使用化学喷雾剂。