Plant Protection Institute，Hebei Academy of Agricultural and Forestry Sciences，IPM Center of Hebei Province，Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China，Ministry of Agriculture，Baoding 071000，Hebei，China
The action mode of 42.8% fluopyram + trifloxystrobin SC and 22.5% picoxystrobin SC were tested by in vitro leaves method，and the control efficiency on tomato gray mould was assessed though field trials. The results showed that the EC50 values for protective activity of 42.8% fluopyram + trifloxystrobin SC and 22.5% picoxystrobin SC were 4.04 μg·mL-1 and 10.79 μg·mL-1，respectively. The EC50 values for treatment of these 2 new fungicides were 26.30 μg·mL-1 and 45.93 μg·mL-1，respectively. The results of field experiment indicated that the control efficiency of these 2 new fungicides on tomato gray mould applied under the recommended dosages was over 80%. Therefore，they can be used for controlling tomato gray mould.
赵建江 王文桥 马志强 孟润杰 毕秋艳 韩秀英*. 两种新杀菌剂对番茄灰霉病的作用方式及田间防效[J]. 中国蔬菜, 2016, 1(5): 18-.
ZHAO Jian-jiang，WANG Wen-qiao，MA Zhi-qiang，MENG Run-jie，BI Qiu-yan，HAN Xiu-ying*. Action Mode and Field Control Efficiency of Two New Fungicides against Tomato Gray Mould. China Vegetables, 2016, 1(5): 18-.
