为明确氰烯菌酯与多菌灵不同比例混配对小麦赤霉病菌联合作用类型，采用菌丝生长速率法测定了氰烯菌酯与多菌灵及其6种配比对小麦赤霉病菌的毒力。结果表明，氰烯菌酯与多菌灵及1:1、1:2、1:3、1:4、1:5等混配组合对小麦赤霉病菌的EC50分别是0.325、0.367、0.409、0.503、0.531 mg/L；5种混配组合对小麦赤霉病菌的增效系数（SR）分别是1.52、1.55、1.51、1.29、1.27。氰烯菌酯对小麦赤霉病菌的室内生物活性高于多菌灵，氰烯菌酯与多菌灵1:1，1:2和1:3配比对小麦赤霉病菌有增效作用。

In order to explore the synergistic effects of the mixture between JS399-19 and Carbendazim on Fusarium graminearum and to find the best mixed ratio of the above two pesticides, and their mixtures (prepared by mixing 2 pesticides at the ratios of 1:1,1:2,1:3,1:4,1:5), were involved and their effects on Fusarium graminearum were tested by mycelial growth rate method. The EC50 of JS399-19, Carbendazim, and their five different ratios were 0.325, 0.367, 0.409, 0.503 and 0.531mg/L, respectively. The efficiency coefficients of the mixtures at the 5 ratios were 1.52, 1.55, 1.51, 1.29 and 1.27, respectively. The indoor biological activity of JS399-19 to Fusarium graminearum was higher than that of Carbendazim. The mixed ratios (1:1,1:2 and 1:3) of two pesticides had synergistic effects on Fusarium graminearum.