Ключевые слова: agriculture, aphid, aphididae, biological, bug, closeup, dangerous, detail, disease, elm, entomology, farming, farmland, field, floral, foliage, gall, gall wasp, gardening, green, growth, hemiptera, homoptera, illness, infected, infection, infestation, insect, leaf, macro, mite, natural, nature, outdoors, parasite, parasitic, pest, plant, plantation, protect, protection, red, springtime, summer, tetraneura, tetraneura ulmi, tree, ulmi, ulmus, wildlife,