Forage, Feed And Grazing Restrictions For Some Common Corn And Soybean Herbicides

Jul 27, 2022

By Kevin Bradley

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.

Table 1 Waiting period before utilizing herbicide-treated corn for grazing or forage (silage) use.

Herbicide	Grazing Restriction	Forage (silage) Restriction
	-----Time After Application-----
2,4-D	7 days	7 days
Accent	30 days	30 days
Acuron	45 days	60 days
Aim	none	none
Anthem ATZ	60 days	60 days
Atrazine	60 days	60 days
Balance Flexx	none	none
Banvel	after milk stage	after milk stage
Beacon	30 days	45 days
Bicep II Magnum/Cinch ATZ	30 days	30 days
Buctril	30 days	30 days
Cadet	90 days	30 days
Callisto	do not graze	45 days
Callisto Xtra	do not graze	60 days
Capreno	45 days	45 days
Clarity	after milk stage	after milk stage
Corvus	45 days	45 days
Degree	21 days	21 days
Degree Xtra	21 days	21 days
Distinct	32 days	32 days
Dual II Magnum/Cinch	30 days	30 days
Gramoxone	none	none
Guardsman Max	40 days	40 days
Halex GT	45 days	45 days
Harness	21 days	21 days
Harness Xtra	21 days	21 days
Hornet	85 days	45 days
Impact	45 days	45 days
Keystone	21 days	21 days
Lariat/Bullet	21 days	21 days
Lasso/Micro-tech	none	none
Laudis	45 days	45 days
Lexar	45 days	45 days
Liberty	70 days	60 days
Lumax	45 days	45 days
Northstar	30 days	45 days
Outlook	60 days	60 days
Parallel	30 days	30 days
Peak	30 days	40 days
Prowl/Pendimethalin	21 days	21 days
Permit/Sandea	30 days	30 days
Prequel	30 days	30 days
Princep/Simazine	do not graze	none
Python	85 days	85 days
Realm Q	45 days	45 days
Resicore	45-60 days	45-60 days
Resolve	30 days	30 days
Resource	28 days	28 days
Roundup/other glyphosates	50 days	50 days
Sencor	60 days	60 days
Sharpen	80 days	80 days
Shieldex	45 days	45 days
Status	32 days	32 days
Steadfast	30 days	30 days
Steadfast ATZ	60 days	60 days
SureStart	45 days	45 days
Surpass/Topnotch	21 days	21 days
Stinger	40 days	40 days
TripleFlex	45 days	45 days
Verdict	80 days	80 days
WideMatch	47 days	47 days
Yukon	after milk stage, at least 30 days	after milk stage, at least 30 days
Zidua	none	none

Table 2 Waiting period before utilizing herbicide-treated soybean for grazing or haying.

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.