I am a first-year rose gardener. I have 5 roses in containers. 4 were from J&P and one from another rose supplier, the name of which I have forgotten. That one is known as Frankly Scarlet. I have discovered an outbreak of rose aphids on two new growth areas of the Frankly Scarlet. There are also a few aphid eggs on the undersides. This rose had yellowish leaves on its' base a week ago and I gave it some rose food. I am not sure if this is related to the aphids. I check my roses every day and this evening is the first time I saw the aphids/eggs. What can I do to get rid of the aphids and how bad is the prognosis?? I have put this rose in quarantine on another part of our patio, about 6 feet away from the other roses, which so far look aphid-free. Is this far enough to prevent spreading the infection?? Thank you all in advance for your assistance.