Effects of a novel mesoionic insecticide, triflumezopyrim, on the feeding behavior of rice planthoppers, Nilaparvata lugens and Sogatella furcifera (Hemiptera: Delphacidae)
Effects of a novel mesoionic insecticide, triflumezopyrim, on the feeding behavior of rice planthoppers, Nilaparvata lugens and Sogatella furcifera (Hemiptera: Delphacidae)
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新型介离子杀虫剂三氟苯嘧啶对稻飞虱、褐飞虱和白背飞虱（半翅目：飞虱科）取食行为的影响
DOI：
10.1016/s2095-3119(20)63197-5
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发表时间：
2020
影响因子：
4.8
通讯作者：
Fang Liu
中科院分区：
文献类型：
--
作者：
Jun Zhu;Wenqing Sun;Yao Li;Linquan Ge;Guoqing Yang;Jianxiang Xu;Fang Liu
褐飞虱和白背飞虱是亚洲重要的吸汁性水稻害虫。此前研究表明，中离子杀虫剂三氟唑啉对褐飞虱和白背飞虱都有很好的防治效果。本研究采用电穿透技术研究了三种浓度(LC_(10)、LC_(50)和LC_(90))对褐飞虱和白背飞虱取食行为的影响。结果表明，棉铃虫的EPG信号有NP、N1、N2、N3、N4和N5六种不同的波形，分别对应于取食过程中未穿透、刺孔穿透表皮、唾液分泌、刺孔胞外运动、韧皮部汁液吸收和木质部水分吸收。与未经治疗的对照组相比，LC_(50)和LC_(90)时的曲氟咪唑核苷使非穿透期延长了105.3~333.7%。在LC_(10)和LC_(50)下，对褐飞虱的探测频率显著增加，而对白纹伊蚊的探测频率在所有浓度下均显著降低。接触三氟美佐匹林可延长唾液分泌时间，缩短细胞外活动时间。LC_(50)和LC_(90)处理的韧皮部汁液吸收持续时间分别从37.2%减少到77.7%。对曲氟咪唑和吡灭津的反应在取食行为上的差异很小。综上所述，结果表明，LC_(50)和LC_(90)浓度对褐飞虱和白背飞虱的取食活性的抑制作用主要是通过延长非穿透时间和缩短韧皮部汁液的摄取时间来实现的，这可能有助于在亚洲更有效地利用雷氟咪唑。
The rice planthoppers, Nilaparvata lugens and Sogatella furcifera, are important sap-sucking pests of rice in Asia. The mesoionic insecticide triflumezopyrim was previously shown to be highly effective in controlling both N. lugens and S. furcifera. In this study, electropenetrography (EPG) was used to evaluate the effect of three triflumezopyrim concentrations (LC_(10), LC_(50) and LC_(90)) on the feeding behavior of N. lugens and S. furcifera. EPG signals of planthoppes indicated that there were six different waveforms NP, N1, N2, N3, N4, and N5, which corresponded to non-penetration, stylet penetration into epidermis, salivation, extracellular movement of stylet, sap ingestion in phloem, and water ingestion in xylem during feeding. Compared to untreated controls, triflumezopyrim at LC_(50) and LC_(90) prolonged the duration of the non-penetration period by 105.3 to 333.7%. The probing frequencies of N. lugens exposed to triflumezopyrim at LC_(10) and LC_(50) were significantly increased; however, the probing frequencies of S. furcifera showed a significant decrease when exposed to triflumezopyrim at all concentrations. Triflumezopyrim exposure prolonged the duration of salivation and shortened the duration of extracellular movement. The duration of phloem sap ingestion decreased from 37.2 to 77.7% in the LC_(50) and LC_(90) treatments, respectively. Differences in feeding behavior in response to triflumezopyrim and pymetrozine were minimal. In summary, the results show that the LC_(50) and LC_(90) concentrations of triflumezopyrim inhibit the feeding activities of N. lugens and S. furcifera mainly by prolonging the duration of non-penetration and by shortening the duration of phloem sap ingestion, which may foster more efficient use of triflumezopyrim in Asia.