The conventional way of dealing with them is to spray a highly toxic systemic pesticide around the base of the tree. This gets absorbed by the tree's roots and is circulated throughout the entire tree; even the fruit at the tree's extremities absorbs it, so that it can't be removed even by washing or peeling.
傳統的做法是在地面灑下一種毒性極高的「系統性農藥」— — 由樹根吸收，輸送到全樹，連末端果實都會吸收到，即使清洗、削皮也去除不了。