Abstract: In order to control the damage of Allomyrina dichotoma Linnaeus newly found on Dendrobium candidum， we studied the pests biological characteristics， regularity of outbreak and damage features. Based on the field efficacy trials， the best chemical control agents were selected. And combined with other control measures， a set of effective integrated control measures were summed up. A. dichotoma has only one generation a year， whose adults occurred from June to August and larvae had three instars in Hangzhou area. The third instar of larvae did the most damage and had the longest developmental duration for about 265-290 days. Adults are nocturnal and also have phototaxis， hygrophilous and chemotaxis. Bifenthrin·clothianidin granula had the best control efficacy of 907%， then followed by 04% chlorantraniliprole granula， and other biological and agricultural control methods showed a limited effect. Results of field efficacy trials and pesticide residue analysis showed that the pesticide residue of chlorantraniliprole granula was very low and safe enough for use， while that of bifenthrin·clothianidin granula was beyond EU MRLs even after 14 d， therefore the latter was suggested to be prolonged its chemical safety interval period. It is important to take integrated measures to control A. dichotoma．

Key words: Allomyrina dichotoma Linnaeus, Dendrobium candidum, biological characteristics