
Certified GKH Gardening Expert
I have not tried this, so I cannot determine if it is true, but supposedly this works when you bury them in the soil around the bush. If you are looking for a more sure-fire treatment for aphids, then I would recommend neem oil. It is very effective in treating these pests and is safe to use. The following articles should be of some help to you: https://www.gardeningknowhow.com/plant-problems/pests/homemade-aphid-control-a-natural-way-to-kill-aphids.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm