The Damage Regularity of Monochamus alternatus in Qinshui County,Shanxi Province
[Objective]The aim of this study was to clarify the damage characteristics and occurrence regu-larity of Monochamus alternatus in Qinshui County Shanxi Province,and to provide theoretical and scientif-ic basis for effectively preventing and controlling the further spread of M.alternatus and the invasion of Bursaphelenchus xylophilus in Shanxi Province.[Method]From 2019 to 2022,the dynamic monitoring method was used to monitor the population dynamics of M.alternatus adults by hanging traps for four years,and the morphological characteristics of adults were analyzed.Combined with the"law of total ef-fective accumulated temperature"and meteorological data,the generations of M.alternatus in Qinshui County Shanxi Province was calculated.A total of 24 standard plots were established,and the damage of M.alternatus to the tree species in the plots was investigated.At the same time,36 dead P.bungeana trees were selected for stumpage dissection to clarify the occurrence and damage of M.alternatus on the host tree.[Result]There were significant differences in the five indexes of elytra length,antenna length,antenna length/body length,tibia length and femur length between male and female adults of M.altern-atus in Qinshui County Shanxi Province.The ratio of antenna length to body length of M.alternatus adults could be used as a morphological index for sex determination of M.alternatus in Shanxi Province.The generation of M.alternatus in Qinshui County Shanxi Province was about 1 generation per year.The oc-currence period of M.alternatus adults was about from late May to early October.The beginning period was late May,the peak period of emergence was from mid-June to mid-July,the peak period was mid-July,and the end period is early October.In Qinshui County Shanxi Province,M.alternatus mainly damaged P.bungeana trees with a diameter of 2.50-17.50 cm.The larvae were mainly distributed at 0-1 m(41.54%)of the trunk,and the elusion holes were mainly concentrated in 1-2 m(28.62%)of the trunk.[Conclusion]The generation of M.alternatus in Qinshui County Shanxi Province is about 1 generation per year,and the morphological characteristics of male and female adults are significantly different.The occur-rence period of adult is from late May to early October,and the peak emergence period is mainly from mid-June to mid-late July.M.alternatus is mainly harmful to P.bungeana in Qinshui County Shanxi Province.The density of larvae and the number of elusion holes are mainly concentrated in the range of 0-2 m.
万方数据
维普
