rosy leaf-curling apple aphids, dysaphis devecta, apple tree pest. detail of affected leaf

affected agriculture aphid aphids apple attack background biology branch bug closeup colony damage danger disease dysaphis environment garden gardening green growth infestation infested insect insecticide leaf leaves lice louse macro nature outdoor parasite parasitic pathology pest pesticide plant plantaginea problem protection radicicola radicola rosy season sick spring stem summer tree