柑桔全爪螨Panonychus citri(Mcgregor)是柑桔产区的重要害螨。一般认为,我国北方仅在温室内发生(王慧芙1981)。但据笔者调查,除在温室内(主要危害柑桔、佛手等)有发生外,在泰安地区野外也有发生。1990年7～9月,山东农业大学泰安农场果园周围的防护树一枸桔上大发生,并蔓延至园 Panonychus citri (Mcgregor) is an important pest of citrus producing areas. It is generally accepted that the northern part of our country only occurs within the greenhouse (Wang Huifu 1981). However, according to the author’s investigation, in addition to the greenhouse (mainly endangering citrus, bergamot, etc.) have occurred, in the wild have also occurred in Tai’an. From July to September 1990, the protective tree around the orchard of Tai’an Farm in Shandong Agricultural University took place on a large scale and spread to garden