Pennsylvania Smartweed

Common Name: Pennsylvania Smartweed

Genus: Polygonum

Species: pensylanicum

Identification: The plant has a well-developed taproot with an erect stem that can measure up to 3 feet in height. Leaves are long and taper to a point. An identifying feature are the swollen nodes.

Geographic Distribution: Found primarily in the eastern half of the United States, more specifically in low, moist sites such as road ditches, but can be a problem in cultivated fields.

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Crops affected by Pennsylvania Smartweed

Additional Pests

Alfalfa Weevil
Hypera
Amaranthes
Amaranthus palmeri, Amaranthus hybridus, Amaranthus spinosus
Aphids
Therioaphis maculata, Dysphis plantaginea, Acyrthosiphon kondoi, Acyrthosiphon kondoi, Acyrthosiphon pisum, Aphis gossypi
Armyworm, Beet
Spodoptera
Armyworms
Barnyardgrass
Echinochloa
Billbugs
Bittercress
Black Cutworm
Black Nightshade
Black Vine Weevil
Boll Weevil
Anthonomus
Cabbage Looper
Trichoplusia
Carpetweed
Cherry Fruit Fly
Chinch Bug
Codling Moth
Cydia
Colorado Potato Beetle
Leptinotarsa
Common Cocklebur
Xanthium
Common Ragweed
Corn Borers
Corn Earworm
Corn Rootworm
Corn Silkfly
Crabgrass
Digitaria sanguinalis, Digitaria ischaemum, Digitaria ciliaris
Cupgrass
Eriochloa gracilis, Eriochloa villosa
Cutworms
Agrotis ipsilon, Agrotis orthogonia, Peridroma saucia
Dandelion
Eastern Nightshade
Solanum americanum, Solanum nigrum, Solanum ptycanthum, Solanum saccachoides
European Corn Borer
Ostrinia
Fall Armyworm
Spodoptera
Field Pennycress
Foxtail Species
Setaria venticillata, Setaria faberi, Setaria viridis, Setaria glauca
Giant Ragweed
Goosegrass
Eleusine
Grasshopper
Melanoplus sanguinipes, Camnula pellacida
Green Peach Aphid
Myzus
Hornworms
Japanese Beetle
Jimsonweed
Datura
Johnsongrass seedling
Sorghum
Kochia
Kochia
Lambsquarters
Chenopodium
Leafhoppers
Leafminer
Liriomyza trifolii, Liriomyza sativa, Liriomyza huidobrensis
Leafroller
Archips rosanus, Archips argyrospila, Argyrotaenia velutinana, Choristorenra rosaceana
Lesser Cornstalk Borer
Long-Horned Beetle
Loopers
Lygus Bug
Lygus
Maggots
Morningglory
Nightshades
Solanum americanum, Solanum nigrum, Solanum ptycanthum, Solanum saccachoides
Northern Corn Rootworm
Diabrotica longicornus barberi, Diabrotica virgifera virgifera
Nutsedges
Cyperus rotundus, Cyperus esculentus
Panicum, Fall
Panicum
Panicum, Texas
Panicum
Pear Psylla
Cacopsylla
Pigweed, Redroot
Amaranthus
Pink Bollworm
Pectinophora
Plant Bugs
Plum Curculio
Potato Flea Beetle
Prickly Sida
Sida
Ragweeds
Ambrosia artemisiifolia, Ambrosia trifida
Sandbur, Field
Cenchrus
Sap Beetle
Seedcorn Beetle
Seedcorn Maggot
Shattercane
Sorghum
Sicklepod
Cassia
Silverleaf Whitefly
Bemisia tabaci, Bemisia argentifolii
Sod Webworm
Southern Corn Leaf Beetle
Southern Corn Rootworm
Diabrotica
Southwestern Corn Borer
Diatrea
Spider Mites
Tetranychus urticae, Tetranychus turkestani, Tetranychus pacificus, Tetranychus cinnabarinus
Spotted Cucumber Beetle
Diabrotica
Sprangletop
Spurred Anoda
Anoda
Stalk Borer
Stink Bug
Nezara viridula, Chlorockroa say, Euschistus consperus
Sweet Potato Silverleaf Whitefly
Bemisia tabaci, Bemisia argentifolii
Tarnished Plant Bug
Lygus
Thrips
Tobacco Budworm
Helicoverpa
Velvetleaf
Abutilon
Venice Mallow
Hibiscus
Waterhemp
Western Corn Rootworm
Diabrotica longicornus barberi, Diabrotica virgifera virgifera
White Grub
Whiteflies
Wild Mustard
Brassica
Wild Sunflower
Helianthus
Wireworms
Melanotus fissilis, Limonius spp. Many species in the order Coleoptera, family Elatoridae.
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