Help - what are these? And what should I do about them?
My newly plated (2007) rose Rambling rector has acquired some unpleasant passengers in the form of blackish, soft bumps, about 4-5 mm diam and 3mm high on stems and in nodes. Each is soft, slightly shiny - and tends to be accompanied by one ant. Some are dry; others collapse on touch into a sticky, yellowish gunge. I have been scraping these off with a penknife, but each day more appear (not to mention greenfly which I'm treating with soapy water. Which seems to result in clean greenfly ... but I don't want to damage the few bees that remain) Any ideas?
Kind regards
BM
bernardrmartin@hotmail.com