谢谢北木！这个很赞，我见有人在西红柿上用过。
However, sulfur can be damaging to some squash and melon varieties. Another
option is to spray once a week with a solution of baking soda. Baking soda
increases the surface pH of the leaf making it unsuitable for the growth of
powdery mildew spores. Be sure to spray the undersides of leaves as well as
the upper surfaces when using any of these sprays.
Here’s a recipe to make your own spray:
– 1 teaspoon baking soda
– 1 quart water
– A few drops of liquid soap
Before treating your plants, test the spray on a few leaves to make sure
they are not too sensitive.
