Device for preventing and treating trunk borer

The invention relates to a trunk-boring pest control device which comprises a water pistol, a liquid delivery hose, a spraying nozzle and a telescopic rod; the water pistol is communicated with the spraying nozzle through the liquid delivery hose with a length of 4 m, the spraying nozzle extends to a position 4 m away from the water pistol, and then the spraying nozzle is installed at the upper part of the stainless steel telescopic rod and can rotate; the water pistol is installed at the bottom part of the telescopic rod; when the trunk insect pest control device is used, firstly, mixed pesticide is loaded in the liquid receiver of the water pistol, the telescopic rod is lengthened to the position in which a worm burrow is within the reach of the spraying nozzle, then the needle-shaped spraying nozzle is pricked into the worm burrow, a trigger is cocked, and the pesticide liquid is sprayed out from the spraying nozzle. 1-2ml of pesticide liquid can be sprayed out each time, and each hole is sprayed two to th