On June 2, in the laboratory of the forest defense station of Kudulsen Industrial Company, technicians were measuring and recording the body length, feeding and other parameters for the raised larch caterpillars, grasping the damage and development progress of the larch caterpillars this year, and making life history specimens of larch caterpillars of various insect states and ages. At the same time, they also combine outdoor monitoring to determine the best prevention and control period and effectively protect forest resources. (Photo by Chen Xiaolin and Pang Xiangzhi)