Does anyone know how to make a liquid treatment from rhubarb leaves, to spray on roses that have black spot? I heard that it can be done, but have not located how to make it and if it really works.
"You cannot plough a field by turning it over in your mind." Author Unknown
I did a quick search online and found several tips on making it. The basic thought is to use the leaves to make a tea. 1# of leaves to 3 pints water boiled in a non-metal pan (one source said- ceramic coated, they preferred). The other sources didn't say anything about the pan. After making a strong tea and straining off the leaves. Add another 3 pints of water to dilute.
The sources also said to be careful because the spray is poisonous to all bugs, even the good ones and is toxic to humans. One of the side notes on one article said that the sprays weren't always effective according to some gardeners, but some gardeners swore by them.
ANother source said you can used wormwood to get the same effect.
Thanks for asking the question. It got me to looking!! Now I learned something I didn't know before.
sherry
bend in the high desert
oregon
USA
3775 Posts
Posted - May 20 2010 : 07:51:36 AM
kristina, angie is right. you are using the natural toxins in the leaf to kill. you can also use baking soda diluted to help. then there is diametacious earth. they are skeletens of small crustacians. we use it a lot here. in the garden and on and in my animals. just a thought sherrye
the learn as we go silk purse farm farmgirl #1014
Garden Gate: Rhubarb leaves to treat black spot on roses?
Rhubarb leaves to treat black spot on roses?
Posted - May 20 2010 : 07:39:36 AM
