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农药的沉积量是判定农药有效利用率的重要指标之一。采用3种不同的喷雾器喷施防治灰霉病的化学药剂——10%环酰菌胺可湿性粉剂于大棚种植的番茄上,并于2 h后采集番茄叶片,通过构建气相色谱法(带UECD检测器),分析不同的施药器械对农药沉积量及防治效果的影响。结果表明:采用3WBD-16型背负式电动喷雾器和3WJD-18静电喷雾器施药,环酰菌胺在番茄叶片上的沉积量分别为3.25和5.61 mg/kg,而采用TSP-60(S)热力烟雾器施药,环酰菌胺沉积量最高,达12.83 mg/kg;在防治番茄灰霉病方面,也以热力烟雾器的防治效果最好(对番茄叶片和果实上灰霉病的防治效果分别为86.53%和85.50%),显著高于背负式电动喷雾器处理(叶防效73.88%,果防效74.03%),与静电喷雾器处理的叶防效(77.45%)差异显著,而与果防效(79.85%)无显著差异。本研究结果表明,TSP-60(S)热力烟雾器和3WJD-18静电喷雾器均能提高环酰菌胺在番茄叶片上的沉积量,并可提高对大棚番茄灰霉病的防治效果。
The amount of pesticide deposition is one of the important indicators to determine the effective utilization of pesticides. Three different kinds of sprayers were used to spray chemical agents against gray mold - 10% fenhexamid wettable powder was placed on tomato grown in greenhouse and tomato leaves were collected after 2 h. By using gas chromatography with UECD Detector) to analyze the impact of different pesticides on pesticide deposition and control effects. The results showed that the deposition of fenhexamid on tomato leaves was 3.25 and 5.61 mg / kg, respectively, using the 3WBD-16 knapsack sprayer and the 3WJD-18 electrostatic sprayer. However, Smokehouse application, fenramide deposition highest, up to 12.83 mg / kg; in the control of tomato gray mold disease, but also the best control effect of thermal fogger (on tomato leaves and fruit gray mold disease control effect (86.53% and 85.50%, respectively), significantly higher than the Knapsack electric sprayer treatment (73.88% for leaf control and 74.03% for fruit control), significantly different from that for electrostatic sprayer (77.45%), Effective (79.85%) no significant difference. The results of this study showed that both the TSP-60 (S) thermal fogger and the 3WJD-18 electrostatic sprayer can improve the deposition of fenhexamid in tomato leaves and increase the control effect on tomato gray mold.