Inhibition effect of SiO2 hydrosol against leaf mold of tomato.

The effect of SiO2 hydrosol and preehit wettable powder on leaf mold of tomato was studied.The result showed that leaf mold of tomato was significantly inhibited by SiO2 hydrosol and preehit wettable powder.The control effect on tomato leaves treated by 0.5,1.0,2,3.0 g/L SiO2 hydrosol and 500 times 75% preehit wettable powder was up to 43.34%,55.03%,60.46%,55.75% and 58.18% respectively after 7 d.For leaf mold of indoor potted tomato,it was up to 12.47%,17.79%,43.61%,24.61% and 41.85% respectively after 15 d.It indicated application 2 g/L SiO2 hydrosol was the best treatment to control leaf mold of tomato.