|
|
*** Rhubarb spray ***At first I used rhubarb spray, for I found some books explaining that rhubarb spray had been used traditionally for roses because of the acid it contains.I sometimes added Sage and Thyme extract to rhubarb leaf extract (original blend ?!) It was actually effective, but there were some problems. First, I could make it only while rhubarb was growing. Secondly I had to make it just before I wanted to spray because the effect did not last long. Moreover it is poisonous! You must be very careful when you spray. |
*** Baking soda spray *** | |
As for powdery mildew, you can control it changing PH on the surface of leaves. Baking soda spray is known as the medicine to control diseases of roses. --- 2 grams per 1 liter of water --- I add a few drops of liquid soap because of its adhesive power. Baking soda spray is much effective than baking powder, of course. This spray is not a perfect disease control spray. But I think it effective. |
|