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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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Foxtails |
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| COMMON NAME: | Foxtails |
| SCIENTIFIC NAME: | Setaria spp. (see below) |
| TYPE: | Annual Warm-season Weedy Grass |
| DESCRIPTION | |
| Germination: | April to June. |
| Reproduction: | By seeds July to September. |
| Stems: | Erect, 1 to 2 feet tall. |
| Leaves: | Formed in dense panicle heads. |
| Flowers/ Inflorescence: |
Cylindrical panicle, two florets per spikelet. |
| Fruit: | Includes the whole 2-seed spikelet, with glumes attached. |
FOUND: |
Green foxtail and yellow foxtail are commonly found in Oklahoma. Both are very competitive and can be a serious weed problem in spring planted alfalfa and in thinning older stands. Giant foxtail can be found in northeastern Oklahoma. |
CONTROL: |
Good selective control of foxtails is possible in both seedling and established alfalfa with POAST PLUS and SELECT. Weeds must be treated in the seedling stage. However, control may only last for one cutting because plants are too large at treatment or because of additional emergence of new plants. Some residual control is possible with SINBAR and PURSUIT applied after first and second cutting. Season-long control of foxtails has been good with the high labeled rate of ZORIAL, a preemergence residual herbicide, applied in February. However, the treatment is expensive. |
| Giant Foxtail Setaria faberi Herrm. |
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| In Alfalfa | Plant | Leaf | Plant | Seed Head |
| Additional Giant Foxtail Images | ||||
| Green Foxtail Setaria virdis (L.) Beauv. |
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| In Alfalfa | Plant | Leaf | Plant | Seed Head |
| Additional Green Foxtail Images | ||||
| Yellow Foxtail Setaria glauca (L.) Beauv. |
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| In Alfalfa |  With Crabgrass |
 Leaf |
 Plant |
 Seed Head |
| Additional Yellow Foxtail Images | ||||
| Jim Stritzke Former Alfalfa Weed Control Specialist Department of Plant and Soil Sciences Oklahoma State University |
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