Answer: You can discourage aphids with a strong spray of water from the hose. Or, you can make your own insecticidal soap spray. Soap has been used for centuries as an all-purpose pesticide. It disrupts insects? cell membranes, and kills pests by dehydration. The key is not to use too much soap, or you?ll also kill the vegetation near the pests. If you follow the proportions of soap to water in the Soap Spray recipe, below, the vegetation should be fine.
Note: Buy a liquid soap and not a detergent. Detergents will damage the leaves of your roses.
1 to 2 tablespoons liquid soap
1 quart water
Combine ingredients in a bucket, mix, then transfer to a spray bottle as needed.
Best wishes with your roses.
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