pest

1. N-COUNT Pests are insects or small animals that damage crops or food supplies. 害蟲; 有害的小動物

...crops which are resistant to some of the major insect pests and diseases. …能觝抗一些主要病蟲害的莊稼。

Each year ten percent of the crop is lost to a pest called corn rootworm. 每年有10%的作物受損於一種叫做玉米根蟲的害蟲。

2. N-COUNT You can describe someone, especially a child, as a pest if they keep bothering you. 討厭鬼 (尤指小孩)[非正式]

He climbed on the table, pulled my hair, and was generally a pest. 他爬上桌子，揪我的頭發，真是個討厭鬼。