Efficacy of Bacillus subtilis strain Bv10 in controlling powdery mildew of Euonymus japonicus

In recent years,powdery mildew of Euonymus japonicus severely occurred in Nanyang city,Henan province.Plot tests of spraying the fermentation broth of the biocontrol agent Bacillus subtilis strain Bv10 on spring shoots of Euonymus japonicus against powdery mildew were performed.The results showed that the efficacy of the biocontrol strain was 70.37% in controlling powdery mildew of E.japonicus after 7 d of application,which was lower than the control fungicide triadimefon treatment.At 14 d after application,the efficacy of strain Bv10 was decreased to 25.26%.