北方根结线虫在党参上的群体动态及世代循环  

Population Dynamics and Generation Cycle of Meloidogyne hapla on Codonopsis pilosula

作　　者：谢志军[1] 石明明 吴锦 张玲 陈京环 李惠霞 XIE Zhijun;SHI Mingming;WU Jin;ZHANG Ling;CHEN Jinghuan;LI Huixia(Animal Husbandry-Pasture and Green Agriculture Institute,Gansu Academy of Agricultural Sciences,Lanzhou 730070,China;College of Plant Protection,Gansu Agricultural University/Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province,Lanzhou 730070,China;Gansu Provincial Meteorological Information and Technical Equipment Support Center,Lanzhou 730070,China)

机构地区：[1]甘肃省农业科学院畜草与绿色农业研究所,甘肃兰州730070 [2]甘肃农业大学植物保护学院/甘肃省农作物病虫害生物防治工程实验室,甘肃兰州730070 [3]甘肃省气象信息与技术装备保障中心,甘肃兰州730070

出　　处：《云南农业大学学报（自然科学版）》2024年第3期40-45,共6页Journal of Yunnan Agricultural University:Natural Science

基　　金：国家自然科学基金项目(31760507);国家重点研发计划子课题(2018YFC1706301-5)。

摘　　要：【目的】明确甘肃省党参上北方根结线虫(Meloidogyne hapla)的群体动态和世代循环,以期为根结线虫病的综合防治提供科学依据。【方法】2021年,通过田间定点连续取样对土壤中的北方根结线虫2龄幼虫和根组织中各虫态进行分离和镜检计数。【结果】在甘肃省,从4月上旬开始,北方根结线虫在党参上1年发生4代,平均每代历期为36 d,完成1代最短需要28 d,最长为53 d。田间气温和降水量对北方根结线虫发育影响较大,当田间气温为18℃、降水量为141~176 mm时,北方根结线虫发育较快,完成1代平均为30 d。【结论】本研究明确了北方根结线虫在甘肃省党参上的群体动态及世代循环,对该线虫病的及时防控具有指导意义。[Purpose] To clarify the population dynamics and generation cycle of Meloidogyne hapla on Codonopsis pilosula in Gansu Province,providing a theoretical basis for timely and effective control of the disease.[Methods]In 2021,soil and root samples were periodically collected from one fixed plot of C.pilosula.The 2nd instar larvae of M.hapla in soil and each morphology of nematode in root tissues were separated and counted under stereo microscope.[Results]Beginning in early April,M.hapla disease of C.pilosula in Gansu Province could occur four generations per year,with average duration of 36 days,it took 28 days for minimum and 53 days for maximum to complete a generation.The temperature and precipitation had great effects on the development of M.hapla on C.pilosula.The development period was shorter under appropriate temperature of 18 ℃and the precipitation of 141-176 mm in the field,and the average generation was about 30 days.[Conclusion]This study clarifies the population dynamics and generation cycle of M.hapla in Gansu Province,which has guiding significance for the timely prevention and control of the disease.

关 键 词：党参 北方根结线虫 群体动态 世代循环 

分 类 号：S435.672[农业科学—农业昆虫与害虫防治]