Good afternoon Sarah,

Thank you for your question! Since the eggs aren’t in the soil but on the branches and canes of the plants, you should consider cutting the canes way back and placing them in the trash. This may delay the rose blooming but will get rid of most overwintering eggs. Please note that if you choose to go a systematic route by using an insecticide, you won’t need to prune the canes.

I’ve included several links, including some highlights from those links. You could also remove weeds in the surrounding area as they create a reservoir for them.

If insecticides are needed, insecticidal soaps and oils are the best choices for most situations. Oils may include petroleum-based horticultural oils or plant-derived oils such as neem or canola oil. These products kill primarily by smothering the aphid, so thorough coverage of infested foliage is required. Apply these materials with a high volume of water, usually a 1 to 2% oil solution in water, and target the underside of leaves as well as the top. Soaps, neem oil, and horticultural oil kill only aphids present on the day they are sprayed, so applications may need to be repeated. Although these materials can kill some natural enemies that are present on the plant and hit by the spray, they leave no toxic residue so they don't kill natural enemies that migrate in after the spray.

While the following blurb is from Oregon State, but it offers some suggestions for plants you could plant that attract beneficial insects to control aphids. The best strategy is to grow plants that attract and foster natural predators. These include yarrow, wild buckwheat, white sweet clover, tansy, sweet fennel, sweet alyssum, spearmint, Queen Anne's lace, hairy vetch, flowering buckwheat, crimson clover, cowpeas, common knotweed and caraway.

https://www.canr.msu.edu/resources/aphids

https://ohioline.osu.edu/factsheet/HYG-2031-10

https://extension.oregonstate.edu/news/how-control-aphids-less-toxic-methods

https://ipm.ucanr.edu/PMG/PESTNOTES/pn7404.html (see chemical control section)

https://content.ces.ncsu.edu/rose-aphid

Good luck & have a great day!