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Oklahoma State University Stillwater, OK |
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Oklahoma Alfalfa |
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Oklahoma State University Stillwater, OK |
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Oklahoma Alfalfa |
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Redroot Pigweed |
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| COMMON NAME: | Redroot Pigweed |
| SCIENTIFIC NAME: | Amaranthus retroflexus L. |
| TYPE: | Summer Annual Broadleaf |
| DESCRIPTION | |
| Germination: | April-September. |
| Reproduction: | By seed, July-October. |
| Stems: | Erect, stout, branched, often red at base. |
| Leaves: | Simple, alternate, long-petioled, hairs on underside. |
| Flowers/ Inflorescence: |
Terminal panicle of several crowded stout spikes. Eight inches long and up to two inches wide, very stiff bracts up to 1/4 inch long. |
| Fruit: | Small black seeds, 1/32 inch diameter. |
FOUND: |
Statewide, but mostly eastern counties. |
CONTROL: |
Can be controlled in newly spring planted alfalfa and in thinning stands with BUTYRAC 200 and PURSUIT. |
| In Alfalfa |  Plant |
 Leaf |
 Plant |
 Seed Head |
| Additional Redroot Pigweed Images | ||||
| Jim Stritzke Former Alfalfa Weed Control Specialist Department of Plant and Soil Sciences Oklahoma State University |
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