Host PLANT List 
Glyceria fluitans (Water 
Mannagrass) 
Sipha glyceriae 
Glycyrrhiza lepidota 
(American Licorice) 
Aphis medicaginis 
Goldenrod—see Solidago 
Gomphrena sp. 
(Globeamaranth) 
Aphis fabae 
Gooseberry—see Ribes 
Gourd—see Cucurbita 
Grass 
Brachycolus helci 
Rhopalosiphum splendens 
Grass, 
Barnyard—see Echinochloa 
Brome—see Bromus 
Brook—see Catabrosa 
Needle—see Stipa 
Wheat—see Agropyron 
Greasewood—see Sarcobatus 
Grindelia squarrosa 
(Curlycup Gumweed) 
Amphorophora grindeliae 
Atarsos grindeliae 
Macrosiphum erigeronensis 
Prociphilus erigeronensis 
Ground Cherry—see Physalis 
Groundsel—-see Senecio 
Guelder Rose—see Viburnum 
Gumweed—see Grindelia 
Gutierrezia sp. (Broom 
Snakeweed) 
Capitophorus acanthovillus 
Capitophorus pycnorhysus 
Macrosiphum zerogutierreziae 
Gutierrezia sarothrae 
(Broom Snakeweed) 
Aphis crypta 
Aphis gutierreziae 
Capitophorus utensis 
Hawthorn—see Crataegus 
Hedera helix (English Ivy) 
Aphis pseudohederae 
Hedge Maple—see Acer 
Helenium hoopesi (Orange 
Sneezeweed) 
Macrosiphum martini 
Helianthus sp. (Sunflower) 
Amphorophora masoni 
Aphis maidi-radicis 
Macrosiphum ambrosiae 
Prociphilus erigeronensis 
Helianthus annuus (Common 
Sunflower) 
Aphis debilicornis 
Aphis helianthi 
Macrosiphum ambrosiae 
Macrosiphum solanifolii 
Prociphilus erigeronensis 
Helianthus petiolaris 
(Prairie Sunflower) 
Aphis helianthi 
Helianthus pumilis 
Aphis armoraciae 
Helianthus tuberosus 
(Jerusalemartichoke 
Sunflower) 
Aphis debilicornis 
Helichrysum sp. 
(Strawflower) 
Aphis fabae 
Aphis spiraecola 
Macrosiphum solanifolii 
Myzus solani 
Hemerocallis albida 
(Daylily) 
Aphis sambuci 
Heracleum lanatum 
(Common Cowparsnip) 
Aphis heraclella 
Cavariella aegopodii 
Cavariella essigi 
Rhopalosiphum conii 
Hibiscus sp. (Rosemallow) 
Aphis gossypii 
Hickory—see Carya 
Hippophae rhamnoides 
(Sea Buckthorn) 
Capitophorus hippophaes 
Capitophorus shepherdiae 
Capitophorus xanthii 
Hollycock—see Althaea 
Honeysuckle—see Lonicera 
Hop—see Humulus 
Hordeum sp. (Barley) 
Anoecia graminis 
Forda olivacea 
Macrosiphum granarium 
Rhopalosiphum maidis 
Rhopalosiphum rhois 
Toxoptera muhlenbergiae 
Hordeum vulgare (Barley) 
Forda olivacea 
Rhopalosiphum maidis 
Rhopalosiphum rhois 
Toxoptera graminum 
Hornwort—see 
Ceratophyllum 
Horsebean—see Vicia 
Horsemint—see Monarda 
Horseradish—see Armoracia 
Humulus lupulus (Common 
Hop) 
Macrosiphum solanifolii 
Phorodon humuli 
Hyacinth, Wild—see 
Quamasia 
Ipomea rubra coerulea 
(Heavenlyblue 
Morningglory) 
Myzus persicae 
Iresine lindeni 
Myzus persicae 
419 
Iris sp. (Iris) 
Aphis tulipae 
Iva sp. (Sumpweed) 
Aphis helianthi 
Aphis medicaginis 
Macrosiphum solanifolii 
Pemphigus balsamiferae (?) 
Iva xanthifolia (Rag 
Sumpweed) 
Aphis helianthi 
Macrosiphum ambrosiae 
Ivy—see Hedra 
Joepyeweed—see 
Eupatorium 
Juglans sp. (Walnut) 
Monellia caryae 
Panaphis juglandis 
Juglans regia (Persian 
Walnut) (incorrectly 
English Walnut) 
Chromaphis juglandicola 
Monellia caryae 
Juncus sp. (Rush) 
Geoica utricularia 
Juncus lampocarpus 
Sipha glyceriae 
Juneberry—see 
Amelanchier 
Juniperus communis var. 
montana (Dwarf Juniper) 
Cinara juniperensis 
Cinara sibiricae 
Juniperus scopulorum 
(Rocky Mountain Juniper) 
Amphorophora morrisoni 
Cinara burrilli 
Cinara pulverulens 
Cinara sabinae 
Siphonatrophia gravida 
Juniperus utahensis (Utah 
Juniper) 
Cinara pulverulens 
Knotweed—sce Polygonum 
Kochia scoparia (Belvedere 
Summercypress) 
Aphis medicaginis 
Kuhnia eupatoroidea (False 
boneset) 
Macrosiphum atripes 
Lactuca sp. (Lettuce) 
Amphorophora sonchs 
Aphis fabae 
Aphis medicaginis 
Macrosiphum erigeronensis 
Macrosiphum escalantii 
Macrosiphum solanifolii 
Macrosiphum sonchellum 
Myzus persicae 
Myzus solani 
Pemphigus bursarius 
