Posted by Nancy Howell on April 23, 2010 at 07:37:57 from (144.162.48.126):
In Reply to: 2-4-D Amine posted by mss3020 on April 23, 2010 at 06:08:24:
When we first started spraying, the labels would tell you how many ounces per gallon to mix. That has changed. Most products now state an amount per acre. 2-4-D should be one quart (1 qt=32 ounces or 4 cups)per acre. Read your label.
The amount of the herbicide per acre is static, but the amount of water you mix with it can vary. Our ag agent recommends at least 20 gallons per acre.
While a mix of one quart of herbicide sprayed at 25 gallons per acre may be weaker than one quart of herbicide sprayed at 20 gallons per acre, at 25 gallons per acre you are putting more herbicide on the weed. That means if you were spraying 20 gallons per acre the weeds might get 4 or 5 droplets. At 25 gallons per acre, the weed gets hit with maybe 7 or 8 droplets so even though the actual mix is not as strong, more of the mix gets on the undesired weeds. At the lower spray rate of 20 gal/acre, some weeds can be missed or not get enough to be effective.
Also, if you plan on grazing that field, be sure to read your label and find out how long after spraying you have to wait until you can graze the field. I don't remember exactly, but I think with 2-4-D you have to wait at least 10 days after spraying before you can graze the field.
If you need to graze this field right away, there are several products that do not have a wait time between spraying and grazing. We use GrazeonNext because it doesn't have any hold or wait time from when the herbicide is sprayed and when you can graze the field.
I recommend you find out who your local ag agent is and give him a call. They are very helpful.
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