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I have aphids on my roses and want to know the soap to water ratio for mix.
Hardiness Zone: 6a
By Ann from IN
According to Colorado State University you want a 2% solution of dish soap to water, for example add 4 teaspoons of dish soap to a quart of water. See documentation at www.ext.colostate.edu/
Otherwise, use a safe, commercial insecticidal soap or make your own with 1 tbsp liquid dish soap and two cups of water.
Strong smelling roots and spices such as garlic, onions, horseradish, ginger, rhubarb leaves, cayenne and other hot peppers, are all known to repel insects. To add any one (or all) of these to your spray, chop them finely and put them into a glass jar. Add 2 cups of boiling water, cover tightly and let everything stand over night. The next day, strain off the liquid and add your dish soap. Freeze any leftover mix to use the next time.
You can buy lady bugs at most garden centers. They come in little containers and when you open it you have hundreds of them flying around.
I've thought of the ladybugs, but have only seen them in groups of 1,500. Imagine that many bugs in your yard! Eeks. I might try the soap route next.
Aphids thrive in temperate regions and feast on plants. They are one of the most pesky and destructive pests that gardeners have to deal with. This page contains homemade aphid spray recipes.