ANALYSIS OF GEOGRAPHIC VARIATION IN ESTERAZSE ISOZYME ZYMOGRAPH OF THE JAPANESE PINE SAWYER,MONOCHAMUS ALTERNATUS HOPE (COLEOPTERA : CERAMBYCIDAE)

松材线虫（PWN）及其病媒日本松材线虫（JPS）被认为是在一段时间内随着进口木材从新大陆引进的，在日本发生了严重的松树侵染。通过杂交分析和DNA分析，研究了近缘种线虫的原始分布和亲缘关系，阐明了入侵日本的PWN的起源。至于病媒，日本血吸虫病在日本和东亚流行，分布广泛。严重侵染松树向非侵染地区的入侵和扩展主要是由于JPS的移动、自身的自然移动或幼虫孳生的被侵染松材的人工移动造成的。​鞘翅具黑色斑纹，颗粒围绕前角大，前正中隆突明显。通过控制PWN和JPS来预防松树死亡，JPS的发生是最重要的，其发生时间取决于种群的生态生理特性和环境条件。台湾的种群不需要冬眠来完成其世代，但日本的JPS需要冬眠，并且需要低温来打破滞育。本报告旨在阐明除形态和生理生态点外，各种群间是否存在差异，以期对日本国内外的锯鳐分类有所贡献。​

Heavy infestations of pines have been occurring for decades in Japan, caused by the pine wood nematode (PWN) and its vector, the Japanese pine sawyer (JPS), Monochamus alternatus hope PWN was thought to be introduced from the New World with imported timbers in some time. The original distributions and relationship among the related nematode species have been studied through crossing and DNA analysis, and the origin of PWN invaded to Japan has been well illustrated. As for the vector, JPS is endemic and distributed widely in Japan, and also in East Asias. The invasion and expansion of the heavy infestations to uninfested areas have been mainly caused by the movement of JPS,by themslves naturally, or by artificial movement of the infested pine logs for utilization in which the larvae are breeding. Morphologically JPS in Japan is not different among regious, but JPS in Taiwan is different from those in Japan, as following : Taiwanese and Chinese populations : one pair of rusty longitudinal stripes on pronotum distinct ; elytra with balck markings, granules around the anterior angle large, anterior median carina distinct. For prevention of pine mortality by controling PWN and JPS,occurrence of JPS emergence is the most essential, of which time is dependent on the eco-physiological characteristics of the populations and environmental conditions. The population in Taiwan does not need hibernation to complete its generation, but JPS in Japan needs hibernation and to break the diapause low temperature is required.The report is to elucidate whether there are some differences among the populations besides morphological and eco-physiological points, and hope to contribute further taxonomy of the sawyers in and outside Japan. Esteraze isozymes of JPS of various origin were analyzed, and it is showed that JPS in Taiwan and main land China have quite different isozyme patterns from those in Japan, suggesting their taxonomical differences.