Herein provided is an autonomous unmanned ground vehicle (AUGV) and handheld device for pest control. The AUGV comprises a chassis with a drive mechanism to displace the AUGV among a plurality of plants comprising at least one weed; an image- capture device to obtain images of the plurality of plants; a motorized arm with a free end displaceable with respect to the chassis; a microwave emitter mounted to the free end, displaceable therewith, and operable to emit microwaves; and a control system to operate at AUGV. The control system comprises a processing unit; and a memory having stored thereon instructions to cause the AUGV to perform: independently navigating the chassis among the plurality of plants; identifying the at least one weed in the images; displacing the motorized arm to position the free end in proximity to the at least one weed; and emitting microwaves toward the at least one weed.