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 (days after treatment) |
Silage/grain |
|---|---|---|
| Accent | 30 | 30 |
| Aim | 0 | 0 |
| Atrazine | 21 |
21 |
| Banvel or Marksmand |
after millk 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 |
do not graze |
do not graze |
| 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 Ultra* |
50* |
50/70* |
| Scorpion III |
85 |
85 |
| Sencor |
60 |
60 |
| Shotgun |
do not graze |
– |
| Stinger |
40 |
40 |
| 2,4-D |
7 |
7 |
*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
