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Helping Graminicides Work

Grass escapes often emerge in June and July. Here are some suggestions to maximize the performance of postemergent grass herbicides:

• Apply to actively growing grasses. The chemical needs to be absorbed into the grass and move to the growing tip.
  
• Use the correct rate for the type of weed. Generally the low label rate controls annual grasses, and the high rate is needed to control quackgrass.
  
• Apply at the susceptible growth stage of the weed. Annual grasses need to have 1 or 2 leaves emerged, and should be sprayed before the 6 leaf stage. Quackgrass generally has a shorter window, but needs at least 3 leaves emerged. Check the label for each grass species.
  
• Wait until a good flush of weeds has emerged. Grasses emerging after treatment will not be controlled.
  
• Use an adjuvant if labeled. Poast Ultra requires the addition of Merge, while Venture L has the required adjuvant included.
  
• Remember that broadleaf weed escapes will not be controlled.
  
• Note the preharvest interval:

NR - not registered NL - not listed on label

NB - registered for non-bearing only

NR - not registered NL - not listed on label P - postharvest
* Broccoli - 44; Cabbage - 35; Cauliflower - 43