甲氰菊酯和阿维菌素对柑橘全爪螨的亚致死效应  

Sublethal effects of fenpropathrin and avermectin on Panonychus citri (Acari:Tereanychidae)

作　　者：何恒果[1] 闫香慧[1] 王进军[2] 赵志模[2] 

机构地区：[1]西华师范大学生命科学学院西南野生动植物资源保护教育部重点实验室,四川南充637002 [2]西南大学植物保护学院昆虫学及害虫控制工程重庆市重点实验室,重庆400716

出　　处：《应用生态学报》2016年第8期2629-2635,共7页Chinese Journal of Applied Ecology

基　　金：西华师范大学博士启动基金项目(10B029);四川省教育厅项目(11ZA293);公益性行业(农业)科研专项(201103020)资助~~

摘　　要：通过叶碟饲养的方法,利用生命表技术,研究了甲氰菊酯和阿维菌素亚致死剂量LC_(20)处理柑橘全爪螨若螨后,对试验种群当代(F_0)和后代(F_1、F_2代)生长发育及繁殖的影响.结果表明:甲氰菊酯LC_(20)处理若螨后,当代雌成螨产卵量显著增加;F_1、F_2代的产卵前期缩短,后代雌性比例增大,且均与对照差异显著;同时,F_1和F_2代种群内禀增长率(r_m)和周限增长率(λ)增大,世代历期(T)和种群加倍时间(Dt)缩短,且F_2代与对照相比差异显著.用阿维菌素LC_(20)处理若螨后,当代种群雌成螨产卵量显著下降;F_1和F_2代的产卵量也显著下降,但后代雌性比例增大,产卵前期显著缩短;F_1和F_2代的种群r_m和λ增大,T和Dt缩短,且F_2代比F_1代更为明显.总体来看,甲氰菊酯和阿维菌素亚致死浓度LC_(20)对柑橘全爪螨的影响并不完全相同,甲氰菊酯能够促进当代种群的发展,而阿维菌素对当代种群有一定的抑制作用;但两种杀螨剂亚致死浓度处理柑橘全爪螨对后代种群都有一定的促进作用.研究结果对柑橘全爪螨综合防治策略的制定有一定的指导意义.A leaf disc bioassay was employed to examine the effects of fenpropathrin and avermectin with a sublethal concentration of LC_（20） on the development and reproduction of F_0,F_1 and F_2generations by means of life tables. The results showed that after the treatment of fenpropathrin at the sublethal concentration,the number of eggs laid per female significantly increased in F0 generation,the pre-oviposition duration was significantly shortened and the female ratio of offspring significantly increased both in F_1 and F_2generations. The intrinsic rate of increase（ r_m） and finite rate of increase（ λ） values all increased,and the generation time（ T） and population doubling time（ Dt） were shortened in F_1 and F2generations,with significant difference observed between F_2 generations and the control. After exposure to avermectin,the number of eggs laid per female significantly decreased in F_0 generation,and progeny（ F_1 and F_2） also produced fewer eggs than the control,while the female ratio of offspring increased both in F_1 and F_2generations and the pre-oviposition period was significantly shortened. The rmand λ values all increased,and the T and Dt were shortened in F_1 and F_2generations. Such effects were more obvious on the F_2 generation than the F_1 generation.Generally,the effects of fenpropathrin and avermectin with a sublethal concentration of LC_（20） were not exactly the same on P. citri. Fenpropathrin could promote the development of the contemporary population,while avermectin had certain inhibition on the contemporary population,but both played a certain role in facilitating the development of future populations,which was of significance in developing integrated pest management strategies.

关 键 词：柑橘全爪螨 甲氰菊酯 阿维菌素 亚致死效应 生命表参数 

分 类 号：S436.66[农业科学—农业昆虫与害虫防治]