重庆杨树云斑天牛的危害特征研究  

Study on the Damage Characteristics of Batocera lineolatain Poplar Plantations of Chongqing,China

作　　者：董昌平 田艳[2] 龙训建[3] 陈桂芳[2] 陈本文[2] 白耀宇[4] DONG Chang-ping;TIAN Yan;LONG Xun-jian;CHEN Gui-fang;CHEN Ben-wen;BAI Yao-yu(Yufengshan Forest Farm,Yubei,Chongqing 401120,China;Chongqing Academy of Forestry,Shapingba,Chongqing 400036,China;School of Resource and Environment,Southwest University,Chongqing 400715,China;School of Plant Protection,Southwest university,Chongqing 400715,China)

机构地区：[1]重庆市渝北区玉峰山林场,重庆401120 [2]重庆市林业科学研究院,重庆400036 [3]西南大学资源环境学院,重庆400715 [4]西南大学植物保护学院,重庆400715

出　　处：《植物医生》2020年第4期21-27,共7页Plant Doctor

基　　金：重庆市科技局社会民生项目(cstc2017shms-xdny80070).

摘　　要：于2017年7—9月调查了重庆市12个区县60个杨树林样点的3160棵杨树,并分析了云斑天牛的危害特征.结果表明,杨树云斑天牛在各调查样点以中、老龄幼虫危害;其危害程度可分为重度、中度、轻度及无危害,它们样点数分别占总调查样点数的70.0%,1.7%,1.7%和26.6%;受害株率和株虫口密度均值分别为45.1%和5.6头/株.在3.0 m以下各树高区间,各样点受害株率均以80%~100%为最多;在≥3.1 m区间,则以60%~80%的为最多.在4个树高区间,株虫口密度和无效刻槽数均差异显著(p<0.01),而区间≤1.0 m则明显高于其他区间,且显著大于2.1~3.0 m和≥3.1 m(p<0.01).在同一树高区间,有效刻槽数和无效刻槽数间均显著相关(p<0.05).无论是株总高度还是不同树高区间的虫口密度均与样点受害株率间显著线性相关(p<0.05),两者间关系更适合用三次函数表示.本研究为重庆杨树云斑天牛的高效及绿色综合有效防控提供理论依据和支撑.In order to provide theoretical basis and support for the efficient and green comprehensive and effective control of Batocera lineolata Chevrolat in Chongqing,field investigations were conducted from July to September,2017 at 60 locations of poplar plantations in 12 counties.A total of 3160 poplar trees were investigated and the damage characteristics of this pest were analyzed.The results showed that the degree of damage caused by B.lineolata with middle-or final-instar larvae varied considerably and was classified into four levels,i.e.heavy,moderate,slight and no damage,which respectively accounted for 70.0%,1.7%,1.7%and 26.6%of the sampling points.The damage rates ranged from 0 to 100%with an average of 45.1%in all sampling points,and individual number of larvae per tree averaged 5.6 head/plant.In 3 height intervals of poplar trunks below 3.0 m,the damage rate of 80%~100%was in the majority,and 60%~80%was mostly shown above 3.1 m.The individual numbers of larvae or the numbers of ineffective notch groove were significantly different among the 4 height intervals of the whole trunks(p<0.01),and they were obviously higher at≤1.0 m than those in other height intervals.There was significant difference in the individual numbers of larvae or the numbers of ineffective notch groove between the height intervals of trunks≤1.0 m and 2.1-3.0 m or≥3.1 m(p<0.01).In the same trunk height intervals,a significant correlation existed between the numbers of ineffective notch groove and effective notch groove(p<0.05).Through correlation and regression analyses,a significant correlation was found between damage rate and individual numbers of larvae in different trunk height intervals or whole trunk height,and the models of cubic function were found to be more suitable for the description of the correlation between damage rate and individual numbers of larvae in sampling plantations(p<0.05).

关 键 词：云斑天牛 杨树 受害株率 株虫口密度 重庆 

分 类 号：S763.7[农业科学—森林保护学]