Host PLANT LIST 
Pyrus communis (Common 
Pear) 
Aphis bakeri 
Aphis medicaginis 
Aphis pomi 
Aphis rosea 
Pyrus malus—see Malus sp. 
Pyrus scopulina—see 
Sorbus occidentalis 
Quamasia hyacinthia (Wild 
Hyacinth) 
Macrosiphum kiowanepum 
Quercus sp. (Oaks) 
Anoecia querci 
Hoplochaitophorus quercicola 
Lachnus montanus 
Lachnus roboris 
Myzocallis discolor 
Myzocallis maureri 
Myzocallis punctata 
Stegophylla quercifoliae 
Thelaxes californica 
Thelaxes dryophila 
Quercus agrifolia (California 
Live Oak) 
Stegophylla quercicola 
Quercus alba (White Oak) 
Myzocallis alhambra 
Myzocallis punctata 
Neosymydobius albasiphus 
Quercus gambelli (Gambel 
Oak) 
Chaitophorus populifoliae 
Myzocallis alhambra 
Myzocallis maureri 
Quercus macrocarpa (Bur 
Oak) 
Myzocallis alhambra 
Myzocallis maureri 
Myzocallis punctata 
Quercus undulata (Wavyleaf 
Oak) 
Myzocallis alhambra 
Neosymydobius albasiphus 
Stegophylla quercifoliae 
Quercus wislizeni (Interior 
Live Oak) 
Stegophylla quercicola 
Quince—see Cydonia 
Quincula lobata (Plains 
Chineselantern) 
Myzus persicae 
Radish—see Raphanus 
Ragweed—see Ambrosia 
Ranunculus sp. (Buttercup) 
Rhopalosiphum nymphaeae 
Thecabius 
populi-conduplifolius 
Rape—see Brassica 
Raphanus sativus (Garden 
Radish) 
Brevicoryne brassicae 
Myzus persicae 
Rhopalosiphum 
pseudobrassicae 
Raspberry—see Rubus 
Reed—see Phragmites 
Rhamnus cathartica 
(Common Buckthorn) 
Aphis abbreviata 
Rheum officinale (Rhubarb) 
Aphis fabae 
Rhus glabra (Smooth 
Sumach) 
Rhopalosiphum rhois 
Rhus trilobata (Skunkhush 
Sumac) 
Rhopalosiphum rhois 
Ribes sp. (Currant and 
Gooseberry) 
Aphis ribi-gillettei 
Aphis varians 
Kakimia thomasi 
Ribes aureum (Golden 
Currant) 
Amphorophora nigricornis 
Amphorophora osborni 
Amphorophora ribiella 
Amphorophora sonchi 
Aphis neomexicana 
Aphis ribiensis 
Aphis varians 
Capitophorus ribis 
Kakimia cynosbati 
Kakimia ribe-utahensis 
Ribes cereum or inebrians 
(Squaw Currant) 
Kakimia cerei 
Aphis neomexicana 
Ribes grossularia (European 
Gooseberry) 
Kakimia cynosbati 
Kakimia houghtonensis 
Ribes inerme (Whitestem 
Gooseberry) 
Kakimia cynosbati 
Ribes nigrum (European 
Black Currant) and 
“Bedbug Currant” 
Amphorophora fronki 
Amphorophora sonchi 
Ribes rubrum or sativum 
(Common Red Currant) 
Aphis varians 
Capitophorus ribis 
Ribes sanguineum (Red- 
flowering Currant) 
Kakimia cynosbati 
Rice Cut-grass—see Leersia 
Robinia neomexicana (New 
Mexico Locust) 
Aphis medicaginis 
Myzocallis robiniae 
423 
Robinia pseudoacacia (Black 
Locust) 
Myzocallis robiniae 
Rocky Mountain Yellow Pine 
—see Pinus ponderosa var. 
scopulorum 
Roripa nasturtium-aquati- 
cum (Watercress) 
Myzus langei 
Myzus persicae 
Rhopalosiphum 
pseudobrassicae 
Roripa hispida (Hispid 
Yellowcress) 
Aphis nasturtii 
Aphis roripae 
Roripa obtusa (Obtuse 
Fieldcress) 
Aphis nasturtii 
Roripa sinuata (Spreading 
Yellowcress) 
Aphis nasturtii 
Rosa sp. (Rose) 
Amphorophora nervata 
Capitophorus fragaefolii 
Lachnus rosae 
Macrosiphum dirhodum 
Macrosiphum solanifolii 
Macrosiphum nigromaculosum 
Macrosiphum rasae 
Myzus porosus 
Rosa fendleri (Woods Rose) 
Lachnus rosae 
Rose, Guelder—see 
Viburnum 
Rosemallow—see Hibiscus 
Rubus sp. (Bramble) 
Macrosiphum solanifolii 
Amphorophora agathonica 
Amphorophora tigwatensa 
Aphis ribicola 
Rubus deliciosus (Boulder 
Raspberry) 
Rhopalosiphum bossekiae 
Rubus laciniatus (Cutleaf 
Blackberry) 
Myzus solani 
Rubus occidentalis (Blackcap 
Raspberry) 
Amphorophora rubi 
Aphis rubicola 
Rubus parviflorus (Western 
Thimbleberry) 
Amphorophora utahensis 
Rubus strigosus (Red 
Raspberry) 
Amphorophora bonnevilla 
Amphorophora rubi 
Amphorophora rubicola 
Aphis rubicola 
Aphis rubifolit 
Myzus solani 
