The utility model relates to the field of
agricultural plant protection instruments, and discloses a manual
trunk injection
pesticide applicator which comprises a rectangular frame, and a two-way
threaded rod is arranged in the rectangular frame in a penetrating mode; an operator stabs a needle on an injection tube into a
trunk to be subjected to
pesticide application, then manually pushes a
piston rod, liquid
medicine in the injection tube is injected into the
trunk through the needle, in the
pesticide application process, the operator can judge whether the liquid
medicine is injected into the trunk or not by observing a pressure gauge, after
pesticide application is completed, the injection tube is pulled out, and the liquid
medicine is injected into the trunk through the
piston rod. By rotating a rotating
handle, the rotating
handle rotates to drive a bidirectional
threaded rod to rotate, the bidirectional
threaded rod rotates to drive cross-shaped blocks at the two ends to relatively move in the horizontal direction of a sliding opening, and the two cross-shaped blocks relatively move to drive two moving rods to relatively move; the relative movement of the two moving rods drives the arc-shaped clamping plates to move relatively, and through the relative movement of the arc-shaped clamping plates, the device can be suitable for trunks with different diameters and is convenient for a user to use.