Application of trans-farnesol as synergist in prevention and treatment of litchi downy blight

The invention discloses application of trans-farnesol as a synergist in prevention and treatment of litchi downy blight. The trans-farnesol has a synergistic effect on methoxy acrylate bactericides; and by mixing the trans-farnesol with the methoxy acrylate bactericides, the toxicity of the methoxy acrylate bactericides can be improved, the control effect of the methoxy acrylate bactericide on field litchi downy blight is improved, and the use amount of the methoxy acrylate bactericide is remarkably reduced. The trans-farnesol is a natural product, has been used in the field of food, and is environment-friendly. The invention provides novel application of the trans-farnesol, the trans-farnesol can be used for preventing and treating plant diseases in an agricultural field, and a novel method is provided for field prevention and treatment of litchi downy blight. 本发明公开了反式法尼醇作为增效剂在防治荔枝霜疫病中的应用，反式法尼醇对甲氧基丙烯酸酯类杀菌剂具有增效作用，与甲氧基丙烯酸酯类杀菌剂混合使用可以提高甲氧基丙烯酸酯类杀菌剂的毒力，提高甲氧基丙烯酸酯类杀菌剂对田间荔枝霜疫病的防治效果，显著减少甲氧基丙烯酸酯类杀菌剂的使用量。反式法尼醇是天然产物，已被用于