Abstract:

Reducing the application of pesticides and fertilizers and obtaining high-yield, high-quality and safe products has become the main goal of vegetable cultivation in China. To study the effects of wood vinegar on the growth and sclerotinia resistance of radish and cabbage, two treatments of diluted wood vinegar 400 times and formulated wood vinegar were sprayed on the foliar surface, and water was sprayed as the control. The results showed that spraying wood vinegar could improve the root neck thickness, total leaf number, green leaf number, leaf area, SPAD and biomass of vegetables. Compared with the control, spraying wood vinegar diluted 400 times significantly increased the yield of radish and cabbage by 88.7% and 37.8%, respectively. After inoculation of sclerotinia bacteria, dilute 100-400 times wood vinegar and formula solution were applied, with the increase of wood vinegar concentration, the bacteriostatic rate of diluted 100-200 times wood vinegar and formula solution could reach more than 50%, of which the bacteriostatic rate of diluted 100 times wood vinegar formula was as high as 75.7%; The control effect (60 h) of radish and cabbage sclerotinia reached 46.9% and 32.8%, respectively, which was not significantly different from the sclerotia of 0.4 μg/mL.

Key words: radish, cabbage, wood vinegar, foliar spray, biomass, sclerotinia