亚致死浓度呋虫胺处理荻草谷网蚜对异色瓢虫捕食功能及生长发育的影响  

Effects of Sitobion miscanthi(Hemiptera:Aphididae)treated with sublethal concentrations of dinotefuran on the predation function and growth and development of Harmonia axyridis(Coleoptera:Coccinellidae)

作　　者：费芍丹 刘永刚 孙佳聪[1] 任兴平 王艺璇 柳敬龙 张海英 FEI Shao-Dan;LIU Yong-Gang;SUN Jia-Cong;REN Xing-Ping;WANG Yi-Xuan;LIU Jing-Long;ZHANG Hai-Ying(College of Plant Protection,Gansu Agricultural University,Lanzhou 730070,China;Institute of Plant Protection,Gansu Academy of Agricultural Sciences,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学植物保护学院,兰州730070 [2]甘肃省农业科学院植物保护研究所,兰州730070

出　　处：《昆虫学报》2024年第9期1200-1208,共9页Acta Entomologica Sinica

基　　金：2023甘肃省重点人才项目(2023RCXM80);甘肃省农业科学院科研条件建设及成果转化项目(2021GAAS21);甘肃省科技计划技术创新引导计划项目(23CXNA0023)。

摘　　要：【目的】探析亚致死浓度呋虫胺处理蚜虫对异色瓢虫Harmonia axyridis捕食功能及生长发育的影响,为害虫天敌的保护和利用及小麦蚜虫的有效治理提供理论依据。【方法】采用浸叶法以亚致死浓度(LC_(20)和LC_(30))呋虫胺处理荻草谷网蚜Sitobion miscanthi 3龄若蚜后,饲喂异色瓢虫各龄期幼虫,观察统计异色瓢虫捕食量N_(a)、瞬时攻击率a、处理时间T_(h)、日最大捕食量N_(a-max)、捕食效能a/T_(h)以及各发育阶段历期。【结果】异色瓢虫幼虫对荻草谷网蚜3龄若蚜的捕食拟合Holling氏圆盘方程。与对照组(异色瓢虫幼虫捕食未接触呋虫胺的荻草谷网蚜3龄若蚜)相比,饲喂LC_(20)和LC_(30)浓度呋虫胺处理的荻草谷网蚜3龄若蚜,异色瓢虫幼虫对荻草谷网蚜的处理时间T_(h)延长,瞬时攻击率a、日最大捕食量N_(a-max)和捕食效能a/T_(h)均降低。其中捕食效能a/T_(h)受LC_(20)和LC_(30)浓度呋虫胺影响最显著的是异色瓢虫1龄幼虫,比对照组分别降低了24.03%和50.48%;其搜寻效应呈现不同程度的下降,且异色瓢虫各龄幼虫历期延长。随着呋虫胺浓度的增加,药蚜对异色瓢虫捕食功能和生长发育的抑制作用也增大。【结论】取食亚致死浓度呋虫胺处理的荻草谷网蚜3龄若蚜,异色瓢虫的捕食功能和生长发育受到抑制。在进行农药喷施作业时,应尽可能选择在捕食效能最高且受农药影响较小的异色瓢虫4龄幼虫盛发期,可以在有效防控蚜虫的同时最大限度减少农药的影响,从而更好地保护和利用天敌。【Aim】To explore the effects of aphids treated with sublethal concentrations of dinotefuran on the predation function and growth and development of Harmonia axyridis,so as to provide the theoretical basis for protection against natural enemies and utilization of natural enemies of pests and effective management of wheat aphids.【Methods】H.axyridis larvae of various instars were fed with the 3rd instar nymphs of Sitobion miscanthi treated with sublethal concentrations(LC_(20)and LC_(30))of dinotefuran by leaf-dipping method.After being fed with aphids treated with dinotefuran,the predation amounts N_(a),instantaneous attack rates a,handling time T_(h),daily maximum predation amounts N_(a-max),predation efficiency a/T_(h)and duration of various developmental stages of H.axyridis were detected and calculated.【Results】The predation of H.axyridis larvae on the 3rd instar nymphs of S.miscanthi fitted with the Holling’s disc equation.Fed with the 3rd instar nymphs of S.miscanthi treated with LC_(20)and LC_(30)of dinotefuran,the handling time T_(h)of H.axyridis larvae on S.miscanthi extended,the instantaneous attack rates a,daily maximum predation amounts N_(a-max),and predation efficiency a/T_(h)reduced as compared to those in the control group(H.axyridis larvae fed with the 3rd instar S.miscanthi nymphs non-subjected to dinotefuran treatment).The predation efficiency a/T_(h)of the 1st instar larvae was most significantly affected by LC_(20)and LC_(30)of dinotefuran among all instars,being reduced by 24.03%and 50.48%,respectively,as compared with those in the control group.The searching efficiency of H.axyridis larvae on S.miscanthi nymphs showed different degrees of decline,and the duration of H.axyridis larvae of various instars was prolonged at varying degrees.The inhibitory effect of aphids containing pesticides on the predation function and growth and development of H.axyridis increased with the increase of dinotefuran concentration.【Conclusion】The predation function,growth and development of H.axyr

关 键 词：异色瓢虫 呋虫胺 亚致死效应 捕食功能 生长发育 

分 类 号：Q965.9[生物学—昆虫学]