mealy plum aphid hyalopterus pruni infestation on the underside of a plum leaf

leaf green plant flower tree herb produce grass frost soil branch shrub nature food lawn wildflower mealy plum aphid hyalopterus pruni infestation underside yield reduction pest plague parasitoid parasite colony aphids agriculture animal biological control bloom bug closeup damage dangerous fruit fuchsia garden gardening horticulture infection insect invasion larvae macro masses orchard outdoors plums predator spring summer wild wildlife leaf