Common Lambsquarters

Chenopodium album L. Also known as fat hen, lambsquarters goosefoot, white goosefoot Biology Common lambsquarters is an upright,...

Palmer amaranth

Amaranthus palmeri S.Wats. Also known as Palmer pigweed or careless weed Biology Palmer amaranth is a summer annual broadleaf...

Waterhemp

Amaranthus tuberculatus (Moq.) Saur (syn.  A. rudis Sauer) Also known as common waterhemp; tall waterhemp; pigweed; roughfruit...

Giant Ragweed

Ambrosia trifida L. Also known as great ragweed   Biology Understanding weed biology allows for effective control measures...

Italian Ryegrass

Lolium perenne L. ssp. multiflorum (Lam.) Husnot. Also known as: annual ryegrass, annual rye The nomenclature surrounding...

Barnyardgrass

Barnyardgrass is an agronomic issue in rice in south-central states, but its distribution ranges through many US states. In rice,...

Johnsongrass

Sorghum halepense (L.) Pers. Also known as aleppo grass, aleppo millet grass Biology Johnsongrass is a fast-growing perennial...

Redroot Pigweed

Redroot pigweed is a summer annual that is native and present in all states of the continental US. Herbicide resistant...

Smooth Pigweed

Images: (top) Smooth pigweed seedlings, VA Tech. (bottom) Mature smooth pigweed with seed heads, Missouri State University....

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