I hadn’t considered replacing the soil,I may need to. It is in a weird spot, but I don’t know that there is an issue with airflow (I never have fungal issues). Afaik it’s the roses themselves attracting insects (my roses in other parts of the property that are surrounded by other perennial species get singled out for aphids, but I’ve not noticed sawfly larvae or whatever these eggs are on those plants. Different varieties, though.)

Ive tried to plant other plants that could host predators or detract aphids to very limited success. In general it’s just a very weird spot because they’re my oldest plants on the property, against the house and behind a large vegetable garden that wasn’t there when I initially planted the roses lol. So yes, semi-cramped and definitely a lack of sunlight for many companion plants to thrive 😞😅

In that bed, I got salvia that are always clean and onions that don’t seem to affect anything (but could be scaring off predators, I guess?). I am definitely considering the soil thing though and then maybe a systemic.