Indoor Toxicity Test of Nine Kinds of Different Fungicides on Rhizoctonia solani of Fusarium solani

The toxicity of nine fungicides on Acanthopanax senticosus of Rhizoctonia solani was determined used the methods of mycelium growth and conidia germinations.The results showed that for the inhibition of mycelium growth experiment,the EC50 of 32.5% difenoconazole and kresoxim-methyl SC was the best and with a minimum dosage in all fungicides and the inhibition effect of EC50 of on Rhizoctonia solani and Fusarium solani were 0.016 5 and 0.024 7 mg·L-1,followed by 10% difenoconazole.For the inhibition of conidia germinations,32.5% difenoconazole and kresoxim-methyl SC was also the best and the EC50 was 0.048 1 mg·L-1,followed by 25% kresoxim-methyl SC.It indicated that 32.5%difenoconazole and kresoxim-methyl SC and 10% difenoconazole not only inhibited mycelial growth,but also significantly inhibited conidia germinations.Contrast to traditional fungicides such as carbendazim and mancozeb,difenoconazole and kresoxim-methyl had advantage on controlling Rhizoctonia solani of Acanthopanax senticosus.