Posted by Jerry/MT on April 23, 2010 at 12:43:36 from (206.183.116.129):
In Reply to: 2-4-D Amine posted by mss3020 on April 23, 2010 at 06:08:24:
I applaud you or being a responsible person for wanting to take care of your pasture weeds. I wish my neighbors would do that, too.
However, as a rancher who uses herbicides, it always scares me when I hear these types of questions , especially when you say".. I use 12 cups per 50 gallons but "...my buddy is using 16 cups for 50 gallons..." 12 cups per 50 gallons that 6 pints per 50 gallons. Now if you put that uniformally on 35 acres, that"s 6/35 pts per acre or O.17 pts per acre. Respectfully, that"s a good way to start breeding resistant weeds! And that"s the last thing we need. It"s hard to get new herbicides approved by the EPA and we don"t need to have the ones we have become ineffective.
You are required to use herbicide per the label instructions usually expressed in pints of herbicide per acre. To do that you need to know the the total flow rate from the nozzles(~gpm)at the particular pressure you are spraying at, the coverage of the spray boom(w~ft) and the speed of your spray rig(~mph). So if you use 1 pt in 10 gallons and want to put on 1 pt of herbicide per acre(10 gallons of mix with at 1 pt herbicide)and your spray is w ft wide
10 gallons per acre= (gpm x 5940)/(mph x w). You can go to your county extension office and they can give you some literature about how to figure this out, and how to calibrate your nozzles, and how to figure out your speed. It"s not rocket science and it"s relatively easy to do. So do yourself and the rest of the agriculture community a favor and if you are going to spray for weeds, do it right.
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