Host PLANT LIST 
Anoecia oenotherae 
Aphis oenotherae 
Aphis oestlundi 
Macrosiphum gaurae 
Onosmodium occidentale 
(Western Marbleseed) 
Aphis helichrysi 
Orache—see Atriplex 
Orthocarpos luteus (Yellow 
Owlclover) 
Kakimia alpina 
Oxalis sp. (Wood Sorrel 
Oxalis) 
Myzus circumflexus 
Oxybaphus—see Mirabilis 
Oxytropis albiflorus (Rocky 
Mountain Crazyweed) 
Aphis fabae 
Aphis medicaginis 
Paintbrush, Indian—see 
Castilleja 
Palm 
Cerataphis lataniae 
Panicum capillare 
(Witch-grass) 
Rhopalosiphum_ maidis 
Panicum crus-galli—see 
Echinochloa : 
Papaver sp. (Poppy) 
Macrosiphum solanifolii 
Myzus persicae 
Parsley—see Petroselinum 
Pastinaca sativa (Garden 
Parsnip) 
Aphis armoraciae 
Aphis fabae 
Aphis heraclella 
Cavariella aegopodii 
Rhopalosiphum conii 
Pea—see Pisum 
Peach—see Prunus persica 
Pear—see Pyrus communis 
Pearleverlasting—see 
Anaphalis 
Peavine—see Lathyrus 
Pedicularis canadensis 
(Early Pedicularis) 
Myzus wakibae 
Pedicularis bracteosa 
(Bracted Pedicularis) 
Kakimia alpina 
Pelargonium sp. 
(Pelargonium) 
Macrosiphum pelargonii 
Penstemon sp. (Penstemon) 
Aphis penststemonicola 
Macrosiphum solanifolii 
Macrosiphum kiowanepum 
Pepperweed—see Lepidium 
Periwinkle—see Vinca 
Petroselinum crispum 
latifolium (Parsley) 
Phacelia sp. (Phacelia) 
Aphis helichrysi 
Aphis phaceliae 
Phalaris arundinacea 
(Canarygrass) 
Sipha glyceriae 
Phaseolus sp. (Bean) 
Aphis gossypii 
Aphis medicaginis 
Trifidaphis phaseoli 
Phaseolus lunatus (Sieva 
Bean) 
Aphis medicaginis 
Phaseolus vulgaris (Kidney 
Bean) 
Aphis fabae 
Aphis medicaginis 
Phleum sp. (Timothy) 
Forda formicaria 
Phleum alpinum (Alpine 
Timothy) 
Forda formicaria 
Phleum pratense (Timothy) 
Rhopalosiphum rhois 
Phragmites communis 
(Common Reed) 
Hyalopterus arundinis 
Physocarpos monogynus 
(Mountain Ninebark) 
Aphis neilliae 
Picea engelmanni 
(Englemann Spruce) 
Cinara coloradensis 
Cinara engelmanniensis 
Cinara hottesi 
Cinara palmerae 
Cinara vandykei 
Picea excelsa (Norway 
spruce) 
Cinara piceicola 
Picea pungens (Colorado 
Spruce) 
Cinara braggii 
Cinara coloradensis 
Cinara fornacula 
Cinara palmerae 
Mindarus abietinus 
Pine—see Pinus 
Pink—see Dianthus 
Pinus contorta var. 
murrayana (Lodgepole 
Pine) 
Cinara brevispinosa 
Cinara medispinosa 
Cinara murrayanae 
Cinara oregonensis 
Essigella californica 
Essigella pini 
Schizolachnus pini-radiatae 
Pinus edulis (Mexican 
Pinyon Pine) 
Cinara atra 
Cinara edulis 
421 
Cinara terminalis 
Essigella hoerneri 
Pinus flexilis (Limber 
Pine) 
Cinara apini 
Cinara villosa 
Cinara flexilis 
Essigella hoerneri 
Pinus monophylla (Single- 
leaf Pinyon Pine) 
Cinara tanneri 
Pinus mughus (Swiss 
Mountain Pine) 
Schizolachnus pineti 
Pinus nigra (Austrian Pine) 
Cinara pini 
Pinus palustris (Longleaf 
Pine) 
Eulachnus rileyi 
Pinus pinaster (Cluster 
Pine) 
Schizolachnus pineti 
Pinus ponderosa (Ponderosa 
Pine) 
Cinara thatcheri 
Pinus ponderosa var. 
scopulorum (Rocky 
Mountain Ponderosa Pine) 
Cinara arizonica 
Cinara glabra 
Cinara oregonensis 
Cinara ponderosae 
Cinara pseudoschwarzii 
Cinara schwarzti 
Cinara solitaria 
Essigella californica 
Essigella hoerneri 
Essigella pini 
Eulachnus rileyi 
Schizolachnus pini-radiatae 
Stomaphis sp. 
Pinus slyvestris (Scotch 
Pine) 
Eulachnus agilis 
Schizolachnus pineti 
Cinara pinea 
Cinara pini 
Pistacia terebinthus 
(Terebinth Pistache) 
Forda formicaria 
Pisum sativum (Garden 
Pea) 
Macrosiphum solanifolti 
Macrosiphum pisi 
Plantainlily—see Funkia 
Plum—see Prunus americana 
and domestica 
Poa sp. (Bluegrass) 
Forda formicaria 
Forda olivacea 
Macrosiphum granarium 
Myzus persicae 
Rhopalosiphum poae 
