Spray application is considered to be the most common method of insecticide use in apple orchard, while trunk injection has often be used in labor-intensive areas. Here, a comparison of both methods in aphid control efficiency and non-target effects was conducted. We evaluated the effects of thiamethoxam by either spray or injection on apple aphid Aphis citricola, and examined the temporal dynamic of thiamethoxam in leaves by using residue analysis. Results showed that thiamethoxam had a remarkable suppression effect on Aphis citricola, and both application methods had obvious control efficiency with the highest value above 90%. The control effect of spray method on Aphis citricola reached the maximum at 7 days after application, while that of injection method reached the maximum at 14 days after application. Moreover, the control effect of injection after 14 days and that of spray after 7 days were not significant, suggesting the spray method had a higher quick-acting effect than the injection method, and the two methods had a similar persistence effect. The population dynamics of non-target insects (ladybugs, parasitoid wasps and predatory bugs) showed basically the same as that of blank controlled. The control effect evaluation of thiamethoxam on Aphis citricola suggest that injection treatment was more effective in protecting natural enemies than spray treatment, and thiamethoxam didn't interfere with natural enemies to control Aphis citricola with both two application methods.

喷洒被认为是苹果园中最常用的杀虫剂，而树干注射通常用于劳动密集型地区。在此，对两种方法在蚜虫控制效率和非目标效果上的比较进行了比较。我们通过喷雾或注射方式评估了噻虫嗪对苹果蚜虫Aphis citricola的影响，并通过残留分析研究了噻虫嗪在叶片中的时间动态。结果表明，噻虫嗪对柠檬蚜有显着的抑制作用，两种施用方法均具有明显的防治效果，最高值在90％以上。喷雾法对柠檬蚜的防治效果施用后7天达到最大值，而注射法在施用后14天达到最大值。此外，14天后注射的控制效果和7天后喷雾的控制效果不显着，表明喷雾法比注射法具有更高的速效效果，并且两种方法具有相似的持久性效果。非目标昆虫（瓢虫，寄生蜂，掠食性昆虫）的种群动态与空白对照的种群动态基本相同。噻虫嗪对柠檬蚜的防治效果评价表明，注射剂比喷药更有效地保护天敌，噻虫嗪不干扰天敌控制柠檬蚜。 两种应用方法。