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Corn Herbicide Grazing, Foraging and Grain Harvest Restrictions

If early harvest of corn is necessary because of drought conditions, a number of corn herbicides restrict the length of time necessary for safe harvest. The following products restrict grazing and/or foraging (silage) following their use in corn. If a corn herbicide product is not listed in the following table, no grazing/feeding restrictions were listed on the product label. For additional information, contact the product manufacturer.

Table 2. Corn herbicide grazing, foraging and grain harvest restrictions.

Corn Herbicide	Graze	Silage/grain

(Days after treatment)
Accent	30	30
Aim	0	0
Atrazine	21	21
Banvel or Marksman	after milk stage	after milk stage
Basagran	12	12
Basis	30	30
Basis Gold	30	30
Beacon/NorthStar	30	45/60
Broadstrike + Dual	85	85
Buctril	30	30
Celebrity	after milk stage	after milk stage
Exceed	30	40/60
Gramoxone Extra (post directed)	do not graze	do not feed
Hornet	85	85
Laddok	21	21
Liberty	70	60/70
Lightning	45	45
Pinnacle	30	30
Pursuit	45	45
Poast Plus/Poast	60	45/60
Python	no	85
Resource	28	28
Roundup (spot treatment)	14	14
Roundup Ultra¹	50¹	50/7¹
Scorpion III	85	85
Sencor	60	60
Shotgun	do not graze	-
Stinger	40	40
2,4-D	7	7

¹ Do not graze, ensile, or feed corn if sequential applications of Roundup were applied to Roundup Ready corn hybrids.

Bill Curran and Dwight Lingenfelter
Agronomy Weed Science

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