Scolytus fagi

例句：

1. 1.The spider was crawling on the wall, and I noticed a small black head on the floor.
   蜘蛛在墙上爬，我注意到地板上有一个小的黑头。
2. 2.The farmer found that the soil had been contaminated with Scolytus fagi, which could be harmful to crops.
   农民发现土壤被黑头虫污染，这对作物有害。
3. 3. To prevent the spread of Scolytus fagi, farmers often use insecticides.
   为了防止黑头虫的传播，农民经常使用杀虫剂。