Weed Control Guide for Ohio Field Crops
Corn: Soil-Applied Herbicides Preplant or Preemergence
| Herbicide |
Formulation |
Product Rate Range |
| Princep/simazine |
4L |
2 - 8 pt |
| 90DF |
1.1 - 4.4 lb |
| 80W |
1 1/4 - 5 lb |
Tank-mix with: Atrazine, Dual Magnum, Lasso, Bullet, Surpass, Harness, Harness Xtra, Outlook, Guardsman Max,
Partner, MicroTech, Sencor.
- Princep (simazine) is often applied at reduced rates in combination with atrazine or atrazine premix products to improve or
extend grass control.
- Mode of action: photosynthesis inhibitor.
- Similar to atrazine in rates of application and weed control spectrum. Simazine is more effective than atrazine for control of
fall panicum and crabgrass, but is less effective for control of cocklebur, quackgrass, yellow nutsedge, velvetleaf, and giant ragweed.
- Can be applied at a rate of 1 lb active ingredient/A in the fall prior to corn planting for control of winter annual weeds such
as chickweed, mustards, and deadnettle. Apply with 2,4-D for best results. If weeds are more than an inch or two tall, apply
with Gramoxone or glyphosate.
- Simazine is more persistent in soil than atrazine. Follow the guidelines given for atrazine regarding crop rotation.
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