Redcurrant Blister Aphid (Cryptomyzus ribis)

Red curled leaves on a currant bush are a sure sign of the #447 Redcurrant Blister Aphid (Cryptomyzus ribis). The aphids themselves are supposed to be a yellowish colour, but the nymphs on the underside of these leaves are bright green. I’ll have to check later to see what the adults look like; however the other species of greenfly that likes currants doesn’t cause the red leaves. Happily, despite the damaged leaves, these aphids are considered fairly harmless for the health of the bush and the fruit crop.