dark grey aphids on a young plant stem

animal aphid aphididae aphidoidea aphids are black blackflies blackfly bug closeup colony common control dark detail development environment foliage garden gardening generation green greenfly grey hemiptera home include insect insecticide insects invasion leaf leaves lice macro many members names natural nature nymph nymphs outdoor parasite parthenogenesis photography pinus plant sap sapsucking small stem sucking superfamily symbiosis viviparous wildlife young