LED绿光对小贯小绿叶蝉取食行为的干扰

Interference of LED green light on the feeding behavior of Empoasca onukii Matsuda

小贯小绿叶蝉是我国茶区普遍发生的害虫之一,其为害严重影响了茶叶的产量和品质。为减少化学农药带来的残留,探索茶园叶蝉防治新方法,采用LED绿光(波长520~525 nm)干扰其取食过程,并通过刺吸电位图谱(EPG)仪记录分析不同光照强度和照射时间对小贯小绿叶蝉取食行为的影响。结果表明,小贯小绿叶蝉取食过程中所产生的波型有NP波、A波、C波、E波、S波、F波和R波,其中NP波占比最大。与自然光(对照)相比,LED绿光对小贯小绿叶蝉取食行为有明显的抑制作用,相同时间内,光照强度越大,刺吸百分比越低,刺吸次数越多,对小贯小绿叶蝉取食行为的干扰越明显。该研究结果可为灯光防治茶园叶蝉的应用提供技术支持。

Empoasca onukii Matsuda is one of the common pests in tea areas in China,and its harm seriously affects the yield and quality of tea.In order to reduce the residues of chemical pesticides and explore new control methods of leafhoppers in tea garden,LED green light(wavelength 520-525 nm)was used to interfere the feeding process of E.onukii,which was sensitive to light,the effects of light intensity and irradiation time on the feeding behavior of E.onukii were analyzed by means of electrical penetration graph(EPG)recording.The results showed that,the waveform produced by the feeding process of E.onukii were NP wave,A wave,C wave,E wave,S wave,F wave and R wave,among which NP wave accounted for the largest proportion.Compared with natural light(control),LED green light significantly inhibited the feeding behavior of E.onukii.At the same time,the higher the light intensity,the lower the percentage of spiking,and the more stinging and sucking times,the more obvious interference to the feeding behavior of E.onukii.The results of this study could provide technical support for the application of light prevention and control of leafhopper in tea garden.