Weed Control Guide for Ohio Field Crops

Corn: Postemergence Herbicides - Contact

Herbicide	Formulation	Product Rate Range
Laddok S-12	5L	1 1/3 - 2 1/3 pt

Tank-mix with: 2,4-D, LVE, Atrazine, Stinger, Banvel, Clarity, Sencor.

• Laddok is a 1:1 premix of bentazon (Basagran) plus atrazine for control of most broadleaf weeds, and suppression or control of yellow nutsedge, Canada thistle, and some perennial vines.
• Mode of action: photosynthesis inhibitor.
• Application rate varies with weed species and size. Apply with UAN (urea ammonium nitrate) solution, ammonium sulfate, nonphytotoxic oil concentrate, or Dash. The label allows combinations of spray additives, which vary with the weed species present. UAN or ammonium sulfate should be added when velvetleaf is the target weed, and may also improve control of cocklebur and Pennsylvania smartweed. Crop oil concentrate should also be added when common lambsquarters or common ragweed is present. Crop oil concentrate or Dash should be used when Canada thistle, yellow nutsedge, or field bindweed is present.
• Apply in a spray volume of at least 10 gpa with a minimum pressure of 40 psi. Increasing the spray volume (up to 50 gpa) will improve control when the crop and weed foliage is dense.
• To suppress Canada thistle, apply 2 1/3 pints when thistle plants are 8 to 10 inches tall until the bud stage.
• A single application of 2 1/3 pints of Laddok can suppress yellow nutsedge that are 1 to 4 inches tall.
• Laddok provides better control of velvetleaf, annual morningglory, lambsquarters, and pigweed than Basagran alone, but is no more effective on triazine-resistant lambsquarters.
• Corn has good tolerance to Laddok.

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