The nematodes hitch a ride in the sawyer beetles 'breathing spiracles, and when the beetles feed or lay their eggs on pine trees, the nematodes take the opportunity to invade the trees, where they infest the xylem tubes, which transport sap, and the resin canals, which secrete pine resin.
當天牛取食松樹，線蟲趁勢進入、寄居松樹輸送水分的導管與分泌松脂的松脂管內。