中文摘要：

[Objective] The paper was to study control effect and bio-control potential of 0.3% agricultural antibiotic 702 aqueous solution(AS) against Rhizoctonia solani,Magnaporthe grisea and Ustilaginoidea virens. [Method] The toxicity effect of 0.3% agricultural antibiotic 702 AS against R. solani,M. grisea and U. virens were studied by mycelial growth rate method and mycelial wet weight method. [Result] The EC50 and EC90 values of agricultural antibiotics 702 AS to R.solani,M. grisea and U. virens in vitro condition were 4.16 and 16.17 mg/L,16.05 and 41.85 mg/L,111.2 and 389.0 mg/L,respectively. Agricultural antibiotics 702 AS had good inhibition effect against R. solani and M. grisea and could basically achieve the effects of commercially available Jinggangmycin and kasugamycin,but the inhibition effect against U. virens was relatively weak. The preventive activity of aqueous solution was obviously higher than treatment activity.[Conclusion] 0.3% Agricultural antibiotic 702 AS is considered to be a potential biological control agent against R. solani,M. grisea and U. virens,and can be used as the potential alternative pesticide of Jinggangmycin.

英文摘要：

Abstractsolution （AS） against Rhizocto- nia solani, Magnaporthe grisea and Ustilaginoidea virens. [ Method] The toxicity effect of 0.3% agricultural antibiotic 702 AS against R., solani, M. grisea and U. virens were studied by mycelial growth rate method and mycelial wet weight method. [ Result ] The EC50 and EC50 values of agricultural antibiotics 702 AS to R. solani, M. grisea and U. virens in vitro condition were 4.16 and 16.17 mg/L, 16.05 and 41.85 mg/L, 111.2 and 389.0 mg/L, respectively. Agricultural antibi- otics 702 AS had good inhibition effect against R. solani and M. grisea and could basically achieve the effects of commercially available Jinggangmycin and kaanga- mycin, but the inhibition effect against U. v/rens was relatively weak. The preventive activity of aqueous solution was obviously higher than treatment activity. [Conclusion] 0.3% Agricultural antibiotic 702 AS is considered to be a potential biological control agent against R. solani, M. grisea and U. virens, and can be used as the potential alternative pesticide of Jinggangmycin.