This experiment tested the indoor toxicity effect of boscalid,fludioxonil and their compound on Botrytis cinerea of strawberry by growth rate method,and evaluated the synergism by Wadley method,and field control effect of boscalid and fludioxonil compound was also evaluated. The results showed that the compound mass ratio of boscalid and fludioxonil as 1:1,5:1,3:1,2:1 and 3:2 exhibited a significant synergism against Botrytis cinerea of strawberry.When the mass ratio was 1:3,1:4,1:5,4:1,their compound of boscalid to fludioxonil showed an additive effect. The 3:1 mass ratio of boscalid and fludioxonil compound had significant synergistic effect with coefficient of 4.47,and the best field control effect of 74.40%.%采用生长速率法测定了啶酰菌胺、咯菌腈及其复配物对草莓灰霉病菌的室内毒力,通过Wadley法进行增效作用评价,并验证了复配物对草莓灰霉病的田间防效.结果表明:啶酰菌胺和咯菌腈以质量比1:1、5:1、3:1、2:1、3:2复配对草莓灰霉病菌表现增效作用,以质量比1:3、1:4、1:5、4:1复配则表现相加作用.其中3:1复配的增效作用最明显,增效系数为4.47,田间对草莓灰霉病的最佳防效可达74.40%.
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