昆虫学报 ›› 2024, Vol. 67 ›› Issue (9): 1200-1208.doi: 10.16380/j.kcxb.2024.09.004

• 研究论文 • 上一篇    下一篇

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

费芍丹1, 刘永刚1,2,*, 孙佳聪1, 任兴平1, 王艺璇1, 柳敬龙1, 张海英2,*


  

  1. (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)
  • 出版日期:2024-09-20 发布日期:2024-10-22

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)

FEI Shao-Dan1, LIU Yong-Gang1,2,*, SUN Jia-Cong1, REN Xing-Ping1, WANG Yi-Xuan1, LIU Jing-Long1, ZHANG Hai-Ying2,*   

  1.  (1. College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China; 2. Institute of Plant Protection, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China)
  • Online:2024-09-20 Published:2024-10-22

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(LC20和LC30)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Na、 瞬时攻击率a、 处理时间Th、 日最大捕食量Na-max、捕食效能a/Th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LC20和LC30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Th延长,瞬时攻击率a、日最大捕食量Na-max和捕食效能a/Th均降低。其中捕食效能a/Th受LC20和LC30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。

关键词: 异色瓢虫, 呋虫胺, 亚致死效应, 捕食功能, 生长发育

Abstract: 【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 (LC20 and LC30) of dinotefuran by leaf-dipping method. After being fed with aphids treated with dinotefuran, the predation amounts Na, instantaneous attack rates a, handling time Th, daily maximum predation amounts Na-max, predation efficiency a/Th 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 LC20 and LC30 of dinotefuran, the handling time Th of H. axyridis larvae on S. miscanthi extended, the instantaneous attack rates a, daily maximum predation amounts Na-max, and predation efficiency a/Th 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/Th of the 1st instar larvae was most significantly affected by LC20 and LC30 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. axyridis could be inhibited by feeding on the 3rd instar S. miscanthi nymphs treated with sublethal concentrations of dinotefuran. Pesticide spraying should be done during the peak period of the 4th instar larvae of H. axyridis with the highest predation efficiency and minimized impact by pesticides, which may help reduce the negative effects of pesticides during aphid control and enhance the protection and utilization of natural enemies.

Key words: Harmonia axyridis; dinotefuran, sublethal effect, predation function, growth and development