I would like to know where the scientific studies are that demonstrate catnip, mint, or other Lamiaceae repel aphids. I read this some years ago and I have tested it thoroughly in my own garden and it does not appear to work. Against control plants, I tested a)growing tomatoes in a bed with mint; b)hanging mint from the tomato plants; c) spraying the plants with mint oil. In no case were the number of aphids statistically different from the controls.
I would like to know where the scientific studies are that demonstrate catnip, mint, or other Lamiaceae repel aphids. I read this some years ago and I have tested it thoroughly in my own garden and it does not appear to work. Against control plants, I tested a)growing tomatoes in a bed with mint; b)hanging mint from the tomato plants; c) spraying the plants with mint oil. In no case were the number of aphids statistically different from the controls.