Borer belongs to LEPIDOPTERA, which feeds on tea branches as larvae. At first, the injured branch was dark green and withered, and soon the branch above the wormhole died. In the young forest below 10, the damaged plants often die. Prevention and control methods: cut off the insect branches. If the branches turn yellow from July to September, cut them along the lower end of the dead branches and burn them centrally; Light trapping and killing, 1 40 watt black light trapping and killing adults in every 40 mu of tea forest; Chemical control, 90% trichlorfon 1000 times can be sprayed in adult emergence stage and 500 times in larval stage.