View Full Version : Pasture Weeds and 2-4-D experts

May. 23, 2011, 10:42 AM
I'm getting ready to spray one of my fields and I have several questions.

How long before I can mow? Is it like Roundup where you shouldn't mow for a while?

How long before I can turn out horses? The directions say no grazing restrictions except for cattle.

Can I over-seed in late summer after spraying now?

May. 23, 2011, 10:46 AM
Contact you county farm agent. They can recommend the herbicide and answer all of your questions. What works in one part of the country won't work everywhere. They are trained in those areas and the information is free. Your tax dollars at work!

May. 23, 2011, 10:55 AM
Been there, done that. I like to double check...he's been a bit wrong occasionally...not horribly, but a little. Most people around here have cattle and that's what the ag agent focuses on.

2-4-D is the proper chemical for the pasture weeds I have.

May. 23, 2011, 11:11 AM
I usually wait at least a week to 2 weeks before I mow after spraying 2 4 D. Depending on what you sprayed I would hold off putting the horses back on it until after a rain unless you sprayed something like GrazeOn.

May. 23, 2011, 02:07 PM
Don't mow after spraying. 2,4,D kills by creating uncontrolled growth at the weed's tips. That's why spraying when the weed is stressed by drought is poor practice. The weed needs to be growing for best effect. If you mow, you're cutting off the spray effects and wasting the effort.
Wait until the weeds die.:yes:

May. 26, 2011, 02:05 PM
Don't mow for 4-5 days. And don't spray immediately after mowing.

I was told by several sources- a wise old hay farmer, poison control, and UK- that it is "safe" for horses to graze as soon as the chemical is completely dry (2hrs). I wait at least 4 hours, or half a day to turnout most horses. Pregnant/lactating mares and foals wait at least 24hrs or preferably after a rainshower.

The poison control specialist said that the chemical is diluted enough that horses must eat A LOT of sprayed grass to consume a harmful amount of 2,4-D. I still prefer to wait as long as possible. But I've turned many horses back out after half a day off, and no ill effects. Just lots of dead weeds. :yes: There are recommendations to wait up to 3wks with beef or dairy cattle...but that's not so much for the animal's health, as the risk of residues in meat or milk.

It will also give a great boost to your overgrazed areas. Sprayed some small, grass-less weed-infested sacrifice pens, and had 75% grass recovery in a week. It's good stuff. Also found that after 2 consecutive years of spraying, we could skip the 3rd year...the weeds weren't bad at all.