Liu M G, Jiang C X, Mao M, Liu C, Li Q, Wang X G, Yang Q F, Wang H J
College of Agronomy, Sichuan Agricultural University, 211 Huimin Rd., Wenjiang District, Chengdu, Sichuan 611130, P.R. China (
J Econ Entomol. 2017 Apr 1;110(2):632-640. doi: 10.1093/jee/tow320.
Sogatella furcifera Horváth (Hemiptera: Delphacidae), is a major migratory pest of rice crops in Asia. The ultrastructure of the flight muscle directly affects the flight ability of insects. The ultrastructure of the flight muscle of some insects can be affected by insecticides. However, the ultrastructure of the flight muscle of S. furcifera and the effect of insecticides on the flight muscle of S. furcifera are not well understood. The present study was conducted to determine the effect of the insecticide dinotefuran on the ultrastructure of the flight muscle of S. furcifera females. In this study, the cross-sectional area and the diameter of the myofibril cross-sections of dinotefuran-treated S. furcifera females increased with the number of days after emergence (DAE), and they were higher than in untreated females. The sarcomere length of myofibrils increased with the number of DAE, and it differed from that of the untreated females. On the first day after emergence, the higher the concentration of dinotefuran, the smaller was the extent of decrease. On the third day after emergence, the higher the concentration of dinotefuran, the larger was the extent of enhancement. For the percentage of mitochondria, those of LC10 and LC20 dinotefuran-treated S. furcifera females increased with the number of DAE and were higher than in untreated females. LC10 dinotefuran-treated S. furcifera females exhibited the largest increase. Thus, our results suggest that the flight ability of S. furcifera increased with time. Some concentrations of dinotefuran can enhance the flight capacity of S. furcifera.
白背飞虱（Sogatella furcifera Horváth，半翅目：飞虱科）是亚洲水稻作物的主要迁飞性害虫。飞行肌的超微结构直接影响昆虫的飞行能力。一些昆虫飞行肌的超微结构会受到杀虫剂的影响。然而，白背飞虱飞行肌的超微结构以及杀虫剂对白背飞虱飞行肌的影响尚不清楚。本研究旨在确定杀虫剂呋虫胺对白背飞虱雌虫飞行肌超微结构的影响。在本研究中，经呋虫胺处理的白背飞虱雌虫的肌原纤维横截面积和直径随羽化后天数（DAE）增加，且高于未处理的雌虫。肌原纤维的肌节长度随DAE增加，且与未处理雌虫不同。羽化后第一天，呋虫胺浓度越高，降低程度越小。羽化后第三天，呋虫胺浓度越高，增强程度越大。对于线粒体百分比，经LC10和LC20呋虫胺处理的白背飞虱雌虫的线粒体百分比随DAE增加，且高于未处理的雌虫。经LC10呋虫胺处理的白背飞虱雌虫增加幅度最大。因此，我们的结果表明白背飞虱的飞行能力随时间增加。某些浓度的呋虫胺可增强白背飞虱的飞行能力。
