With the drought we are currently experiencing in much of central and southern Missouri, many farmers are starting to consider using at least some portion of their corn and soybean crop for livestock feeding purposes. Before making this decision, one of the most important considerations is the forage and feeding restrictions of the herbicides that have already been sprayed for weed control in these fields. Tables 1 and 2 contain this information for some of the most common herbicides utilized for weed management in corn and soybeans in Missouri. In corn, the majority of herbicide labels allow for some type of grazing or forage use following application. As illustrated in Table 1, corn herbicide forage restrictions may vary from as little as 0 to as many as 60 days after application. Unfortunately, in soybean most of the product labels DO NOT allow soybean to be grazed or harvested for forage or hay following herbicide application, so it will be critical to consult the individual product label of the herbicide(s) applied before deciding to utilize this crop as a forage.
Herbicide |
Label Statement Pertaining to Interval Between Application and Grazing, Haying, or Feeding Herbicide-treated Soybean |
2,4-D (various brands) |
Consult individual label as product labels can vary. Do not cut for feed treated hay, forage, or fodder or graze treated soybeans to livestock. |
Anthem |
Do not graze or feed treated soybean forage or hay to livestock. |
Anthem Maxx |
Do not graze or feed treated soybean forage or hay to livestock. |
Assure II |
Do not graze treated fields or harvest for forage or hay. Do not apply within 80 days of harvest |
Authority Assist |
Do not feed treated soybean forage, soybean hay or soybean straw to livestock. |
Authority First |
Do not feed treated soybean forage or soybean hay to livestock. |
Authority MTZ |
Do not graze treated soybean or harvest for forage or hay. |
Authority XL |
Do not feed treated soybean forage or soybean hay to livestock. |
Basagran |
Do not graze or cut treated soybean fields for forage or hay for at least 30 days after the last treatment. |
Boundary |
Do not graze or feed treated soybean forage for 40 days after application. |
Butyrac 200/2,4-DB |
Do not feed/graze soybean forage or harvest hay for 60 days following any 2,4-DB application. |
Canopy |
Do not graze treated fields or harvest for forage or hay. |
Classic |
Do not graze treated fields or harvest for forage or hay. |
Cobra |
Do not graze treated fields or harvest for forage or hay. |
Dual II Magnum/Cinch |
Do not graze or feed treated soybean forage, hay, or straw to livestock 30 days following treatment. |
Enlist One (used on Enlist soybean) |
Do not graze treated soybean. Do not harvest for forage or hay. |
Enlist Duo (used on Enlist soybean) |
Do not graze treated soybean. Do not harvest for forage or hay. |
Engenia (on Xtend or XtendFlex soybean) |
Allow at least 7 days between final application and harvest or feeding of soybean forage. Allow at least 14 days between final application and harvest or feeding of soybean hay. |
FirstRate |
Do not apply within 14 days before harvest for forage or hay. |
Flexstar/Flexstar GT |
Do not graze treated areas or harvest for forage or hay. |
Fusilade DX |
Do not graze or harvest for forage or hay. |
Glufosinate (Liberty, Interline, etc.) on LibertyLink or Glufosinate-resistant Soybean |
Do not graze the treated crop or cut for hay. |
Glyphosate (Roundup products, generic glyphosate labels |
Allow a minimum of 14 days between final application and harvest of soybean grain or feeding of soybean grain, forage or hay. Consult individual glyphosate and Roundup product labels. There are individual differences among labels. |
Harmony |
Allow at least 7 days between application and grazing of treated forage. Allow at least 7 days between application and feeding of forage (green chop) from treated areas to livestock. Allow at least 30 days between application and feeding of dried hay from treated areas to livestock. |
Metribuzin (various products) |
Treated vines may be grazed or fed to livestock 40 days after application. |
Op-Till |
Do not graze or feed treated soybean forage, hay or straw to livestock. |
Op-Till Pro |
Do not graze or feed treated soybean forage, hay or straw to livestock. |
Outlook |
Do not graze or feed forage, hay, or straw to livestock. |
Poast/Poast Plus |
Only processed meal from seed or hay may be fed to animals. |
Prowl/Prowl H2O |
Livestock can graze or be fed forage from treated soybean fields |
Prefix |
Do not graze treated areas or harvest for forage or hay. |
Pursuit |
Do not graze or feed treated soybean forage, hay or straw to livestock. |
Python |
Do not graze or feed treated soybean forage, hay or straw to livestock. |
Raptor |
No grazing or forage restrictions listed. |
Resource |
Do not graze treated fields or harvest for forage or hay. |
Rhythm |
Do not graze treated areas or harvest for forage or hay. |
Roundup WeatherMax/other Roundup labels/other glyphosate labels |
Roundup WeatherMax - Allow a minimum of 14 days between final application and harvest of soybean grain or feeding of soybean grain, forage or hay. Consult individual glyphosate and Roundup product labels. There are individual differences among labels. |
Scepter |
Do not graze or feed treated soybean forage, hay or straw to livestock. |
Select Max |
Do not graze treated fields or feed treated forage or hay to livestock. |
Sequence |
Do not feed treated soybean forage or hay for 30 days after application. |
Sharpen |
Soybean forage may be fed or grazed 65 or more days after application. |
Sonic |
Do not feed treated soybean forage or soybean hay to livestock. |
Storm |
Do not allow livestock to graze on treated forage. Do not feed treated vines. |
Synchrony XP |
Do not graze treated fields or harvest for forage or hay. |
Treflan |
Consult product labels. No apparent grazing or forage restrictions when applied in soybeans. |
Ultra Blazer/Blazer |
Do not use treated plants for feed or forage. |
Valor SX/Encompass |
Do not graze treated fields or feed treated forage or hay to livestock. |
Valor XLT |
Do not graze treated fields or feed treated forage or hay to livestock. |
Verdict |
Do not graze or feed forage, hay, or straw to livestock. |
Warrant/Warrant Ultra |
Do not graze treated area or feed treated soybean forage to livestock following application of this product. |
Xtendimax with VaporGrip |
Allow a minimum of 7 days between application and harvest. |
Zidua |
none |
Zidua Pro |
Do not graze or feed treated soybean forage, hay or straw to livestock. |