20 
BULLETIN 1476, U. S. DEPARTMENT OF AGRICULTURE 
Table 1. — Classified list of P. nubilalis host plants 
CLASS 1. PLANTS SEVERELY ATTACKED 
Names of plants 
Parts attacked 
Barnyard grass (Echinochloa crus-galli (L.) Beauv.) 
Stems. 
Do 
Broomcorn (Holcus sorghum L.) 2 . . _. 
Stalks. 
Cocklebur (Xanthium spp.) J 
Stems, burs. 
Corn (Zea mays L.) (flint, dent, pop, sweet) L_ . _ 
All parts except fibrous roots. 
Dahlia (Dahlia spp.) 
Stalks, flowers. 
Dock (Rumex spp.) 1 
Stems. 
False ragweed (Iva xanthifolia Nutt.) 2 . 
Do. 
Grain sorghum (Holcus sorghum L.) (feterita, hegari, milo, kafir) i. 2 
Hemp (Cannabis saliva L.) 2 
Stalks, seed heads. 
Do. 
Japanese hop (Humulus japonkus Sieb. & Zucc.) ... .. _ 
Stems. 
Do. 
Stems, flowers. 
Prince's plume (Polygonum orientate L.) 
Stalks, flower stems. 
Stems. 
Rhubarb (Rheum rhaponticum L.) 
Leaf stalks. 
Stems. 
Wormseed (Chenopodium ambrosioid.es L.)__ 
Do. 
CLASS 2. PLANTS FREQUENTLY ATTACKED 
Barley (Hordeum vulgare L.) 2 
Bean (Phaseolus spp.) (kidney, lima, scarlet runner) « 
Beet (Beta vulgaris crassa Alef.) 
Broomcorn millet (Panicum miliaceum L.) 2 
Burdock (Arctium spp.) » 
Celery (Celeri graveolens (L.) Britton) 
China aster (Callistemma chinense) 
Chrysanthemum (Chrysanthemum spp.) 
Cotton (Gossypium hirsutum L.) 2 
Cowpea (Vigna sinensis (L.) Endl.) 2 
Horseweed (Erigeron canadensis L.) 
Japanese fleece flower (Polygonum sieboldii De Vriese). 
Jimson weed (Datura spp.) i 
Pepper ( Capsicum annum L.) 
Potato (Solanum tuberosum L.) 
Sorgo (Holcus sorghum L.) 2 
Sunflower (Helianthus annuus L.) 
Swiss chard (Beta vulgaris cicla Moq.) 
Tansy ( Tanacetum vulgare L.) 
Teosinte (Euchlaena mexicana Schrad.) 2 
Wormwood ( Artemisia spp.) J 
Zinnia (Zinnia elegans Jacq.) 
Stems 
Stalks, pods, seeds. 
Leaf stalks, rarely beet roots. 
Stems. 
Do. 
Leaf stalks. 
Stalks, flower stems. 
Stalks, flowers. 
Stalks, bolls. 
Stalks, pods. 
Stems. 
Do. 
Stems, seed pods. 
Stalks, fruit. 
Stalks. 
Do. 
Do. 
Leaf stalks. 
Stems. 
Stems, leaf blades. 
Stems. 
Stalks, flower stems. 
CLASS 3. PLANTS OCCASIONALLY ATTACKED 
Aster (Aster spp.) 1 
Stems. 
Stalks. 
Stems. 
Do. 
Stalks, flower stems. 
Stalks, leaves, flowers. 
Stems, flowers. 
Do. 
Stems. 
Stalks. 
Stems. 
Fruit. 
Stalks, flower stems. 
Stalks. 
Stems. 
Stalks. 
Stalks, flowers. 
Stalks, flower stems. 
Stems. 
Stalks, leaf stems. 
Stems. 
Stalks. 
Stems. 
Do. 
Leaf stalks. 
Stems. 
Do. 
* ■ 
Boltonia (Boltonia asteroides (L.) L'Her.) 
Bread grass (Panicum spp.) 1 ... 
Buckwheat (Fagopyrum vulgare Hill) 2 ... 
Calendula (Calendula officinalis L.) 
Canna (Canna spp.). 
Cockscomb, common (Celosia cristata L.) 2 
Cockscomb, feather (Celosia argentea L.) 2 
Coleus ( Coleus spp.) 
Cosmos (Cosmos bipinnatus Cav.) 
Crab grass (Syntherisma sanguinalis (L) Dulac).. 
Eggplant (Solanum melongena L.)_ . 
Feverfew (Chrysanthemum parthenium (L.) Bernh.) 2 
Fireweed (Erechtites hieracifolia (L.) Raf.) 
Galinsoga (Galinsoga sp.) . 
Geranium (Pelargonium hc r torum) 
Gladiolus (Gladiolus spp.) .. 
Golden Glow (Hort. var. of Rudbeckia laciniata L.) 
Goldenrod (Solidago spp.) 1 ... 
Hollyhock (Althaea rosea Cav.) . 
Hop, common (Humulus lupulus L.) 2 -_ ... 
Jerusalem artichoke (Helianthus tuberosus L.)__ 
Lamb's quarters (Chenopodium album L.) 
Mallow (Malva spp.) 1 
Mangel (Beta vulgaris crassa Alef.) 2 ... 
Motherwort (Leonurus cardiaca L.) 
Mustard (Brassica spp.) 1 
1 Two or more species or varieties are grouped under this common name. The names of these species 
will be furnished to interested persons. 
2 Plants occurring rarely or grown only in the experimental fields. These plants are classified according 
to their susceptibility rather than the frequency in which they are found infested. 
