Pigweed, Redroot

Common Name: Redroot Pigweed (also known as Common Amaranth, Carlessweed)

Genus: Amaranthus

Species: retroflexus

Identification: The lower stem of this plant is often red or red-striped, continuing all the way down to the taproot. Alternate, dull green leaves are covered with hairs and have prominent white veins underneath. The stems of a fully grown plant can measure 2-3 feet tall. Another identifier is its stiff, thick terminal head which has several densely crowded spikes.

Geographic Distribution: Particularly a Great Plains dweller, but found throughout the United States. Grows under most cultivated or waste conditions. Germination occurs anytime during the growing season when soil moisture is adequate.

Alfalfa

Almonds

Apples

Bushberry

Cauliflower

Corn

Corn - Field

Corn - Pop

Corn - Seed

Corn - Sweet

Cotton

Cowpeas

Currant

Delta Rice

Dry Shelled Beans and Peas

Elderberry

Fruits Nuts Trees and Vegetables

Gooseberry

Huckleberry

Potatoes

Small Grains

Sorghum

Soybeans

Succulent Peas & Beans

Sunflowers

Alfalfa Caterpillar Colias

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

Broadleaf Filaree

Broadleaf Signalgrass

Cabbage Looper Trichoplusia

Cabbage Webworm

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

Cowpea Curculio

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

Flea Beetles

Florida Pusley

Foxtail Species Setaria venticillata, Setaria faberi, Setaria viridis, Setaria glauca

Giant Ragweed

Goosegrass Eleusine

Grasshopper Melanoplus sanguinipes, Camnula pellacida

Green Peach Aphid Myzus

Hophornbeam Copperleaf

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

Pea Aphid

Pear Psylla Cacopsylla

Pennsylvania Smartweed Polygonum

Perennial Ryegrass

Pink Bollworm Pectinophora

Plant Bugs

Plum Curculio

Potato Flea Beetle

Prickly Sida Sida

Purslane

Ragweeds Ambrosia artemisiifolia, Ambrosia trifida

Root Maggots

Sandbur, Field Cenchrus

Sap Beetle

Seedcorn Beetle

Seedcorn Maggot

Shattercane Sorghum

Sheperdspurse

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

Spurge

Spurred Anoda Anoda

Stalk Borer

Stink Bug Nezara viridula, Chlorockroa say, Euschistus consperus

Sweet Potato Silverleaf Whitefly Bemisia tabaci, Bemisia argentifolii

Swinecress

Tarnished Plant Bug Lygus

Thrips

Tobacco Budworm Helicoverpa

Two-spotted Spider Mite

Velvetbean Caterpillar

Velvetleaf Abutilon

Venice Mallow Hibiscus

Waterhemp

Western Corn Rootworm Diabrotica longicornus barberi, Diabrotica virgifera virgifera

White Grub

Whiteflies

Wild Mustard Brassica

Wild Radish

Wild Sunflower Helianthus

Wireworms Melanotus fissilis, Limonius spp. Many species in the order Coleoptera, family Elatoridae.

Yellow Nutsedge

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