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post #1 of 19 Old 08-17-2019, 08:24 AM Thread Starter
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Dry time for 2 4 D

Ive been waiting for a window to broadcast spray 2 4 D in advance of core aeration and overseeding. But, we have been stuck in a cycle of late day storms every day and I am running out of time to seed. If I spray in the morning and it gets hit with a storm late day is it the end of the world? Or should I wait it out and just not seed if I run out of time? The product says 3 to 4 weeks before seeding which is getting a little late here already.

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post #2 of 19 Old 08-17-2019, 08:38 AM
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Re: Dry time for 2 4 D

It will usually say on the label what the minimum time is between application and any rain. I think both 2,4-D and glyphosate have about a 4-6 hour 'rainproof' time. You can spray with dew still on the grass with no decrease in effectiveness, it may actually increase absorption. Another way to speed absorption is to use a surfactant in the mix. That decreases the surface tension of the liquid so it "sticks" better and doesn't bead up and roll off the vegetation. I use a small squirt (about 10ml) of dishwashing liquid in the tank when I make my mix (25 gallons); just a few drops is all that's necessary for a 5 gallon hand spray tank.

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post #3 of 19 Old 08-17-2019, 08:49 AM
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Re: Dry time for 2 4 D

Roundup Ultra W/ Liquid Nitrogen in the mix for fast burndown

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post #4 of 19 Old 08-17-2019, 09:01 AM Thread Starter
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Re: Dry time for 2 4 D

I am using a full load of armine400 from TSC in a 25 gallon tow behind. It doesn't say anything on the label about drying but I read 8 hours in the Q&A that the manufacturer answered.

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post #5 of 19 Old 08-17-2019, 01:17 PM
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Re: Dry time for 2 4 D

Should be rainsafe in just a few hours with a good surfactant.
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post #6 of 19 Old 08-18-2019, 10:06 AM Thread Starter
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Re: Dry time for 2 4 D

Thanks for the advice gents. I decided to hold off yesterday and glad I did as we got 3/4" of rain starting at 2PM. I got it down first thing this morning and hope that it does its thing before storms hit later again today.

The sprayer came as part of the X595 package late last Fall. I originally thought I would sell it but it seems like a pretty convenient way to get product on the ground and the product seems cheaper too. While I hope to not have to do what I just did again (we will see how that goes), I may keep it anyway just to put fertilizer down in the Fall, crab preventer in the Spring and in the pretty rare event I need to put water down. The wand on that thing might be a nice ally as I go after the rest of the brush on the property. I was pleasantly surprised with how much volume these things put out...it was almost too much for what I was putting down this morning.
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JD x595 62c 54" blade with extensions

Soon to be former:
JD x300 42"
JD F1145 72" deck 47" blower Cozy Cab
JD 4410 420 Loader 59" blower Curtis Cab tiller box blade rake

Former:
JD F910 60" deck
Ford 1910 4WD Loader Backhoe
Kubota L245 2WD 72" finish mower 5' front blade
Jacobsen GT14
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post #7 of 19 Old 08-18-2019, 04:07 PM
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Re: Dry time for 2 4 D

It is important to adjust it/go at the right speed to put the product down at the correct amount/sq ft. Earlier this summer, one of my customers tried using a hand-carried sprayer for weed control, now his lawn has a bunch of patches where it varied from just too much to WAY too much product was put down, where the grass is either brown, but looks like it might come back next year, to this spot is dead, you need to put new grass here...

And they switched to a commercial company for spraying weed control/fertilizer.
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post #8 of 19 Old 08-18-2019, 04:52 PM
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Re: Dry time for 2 4 D

Do some research on mesotrione herbicide. This might be what you want.
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post #9 of 19 Old 08-18-2019, 05:38 PM
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Re: Dry time for 2 4 D

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Originally Posted by 1978JD212 View Post
Do some research on mesotrione herbicide. This might be what you want.
+1 - I'm a huge fan. Makes any kind of seeding so much easier.
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post #10 of 19 Old 08-18-2019, 07:28 PM
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Re: Dry time for 2 4 D

You want to put it on when the lawn is dry. Damp or dewy lawn dilutes the mix. Once on the plant it sucks it in right away,longer the better but a couple of hours is good. Surfactant as others mention helps a lot especially on smaller leaf plants like clover.

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post #11 of 19 Old 08-18-2019, 08:17 PM Thread Starter
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Re: Dry time for 2 4 D

I cant imagine going after my lawn with a backpack sprayer. Im pretty sure mine is on or off, so the only adjustment is speed and I suppose changing nozzles. I went as fast as I reasonably could and ended up about 10% over what I thought I should have used. Who knows if my assumption about portion that is lawn is off, overlap varied (guaranteed), ground speed variance over my control area (not sure I have a flat spot on my little over 3 acres) or some combination thereof. Either way, initial indicators looked pretty good this afternoon.

Next up is an aerator rental and then spraying some fertilizer. Is next weekend too soon?

JD x595 62c 54" blade with extensions

Soon to be former:
JD x300 42"
JD F1145 72" deck 47" blower Cozy Cab
JD 4410 420 Loader 59" blower Curtis Cab tiller box blade rake

Former:
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Ford 1910 4WD Loader Backhoe
Kubota L245 2WD 72" finish mower 5' front blade
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post #12 of 19 Old 08-19-2019, 09:21 AM
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Re: Dry time for 2 4 D

Quote:
Originally Posted by 1978JD212 View Post
Do some research on mesotrione herbicide. This might be what you want.
Tenacity (mesotrione) is great stuff, but you want to be certain your lawn is primarily made up of non-target grasses before spraying. If your lawn is primarily made up of "junk" grasses, it will kill them all. Not sure if it's urban legend or not - but the lawncare place I get my chemicals from tells a story of a guy who bought a house with a neglected lawn, sprayed tenacity, then ended up with dirt... Might as well have used Roundup.

On the 2,4-D: a 6- to 8-hour rain-free period is suggested for the amine formulations, while the suggested rain-free period for the ester is one hour. Residual 2,4-D in the soil can affect grass seed for up to 3 weeks.

I have a brinley pull behind sprayer and really like it. You do need to figure out the proper ground speed to put down 1 gallon per 1,000 (in my case at least). Next spring, I'm going to try spraying crabgrass preventer rather than buying dimension.
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post #13 of 19 Old 08-19-2019, 09:50 AM
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Re: Dry time for 2 4 D

Amine 400 is a one dimensional herbicide of 2-4 D. A three way herbicide will yield much better results, i.e. Vessel, Trimec or Mec Amine D. If you have hard to kill weeds such as ground ivy and wild violets consider a better product such as T-zone.

4 hours is the usual window for being rainfast, many are pretty safe once dried.

Timing is important when applying herbicides, the best time is early Spring when weeds are actively growing and before the grass has ever been cut. The target weeds will have much more surface area absorbing the herbicide. Fall is also a good time for application as the plant will translocate the herbicide to the root.

Summer is pretty poor as the weeds will have a waxing coating and will not absorb the material well. As others have said, use a surfactant such as Li-700.

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post #14 of 19 Old 08-19-2019, 10:30 AM
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Re: Dry time for 2 4 D

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Originally Posted by TWG1572 View Post
Tenacity (mesotrione) is great stuff, but you want to be certain your lawn is primarily made up of non-target grasses before spraying. If your lawn is primarily made up of "junk" grasses, it will kill them all. Not sure if it's urban legend or not - but the lawncare place I get my chemicals from tells a story of a guy who bought a house with a neglected lawn, sprayed tenacity, then ended up with dirt... Might as well have used Roundup.
We're getting a bit off-topic but excellent points.

I've had great success on my bluegrass lawn. I would also speculate that the Tenacity story is more urban legend and the user botched the application rate. Very little chemical is needed and more is most definitely not better.
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post #15 of 19 Old 08-19-2019, 10:33 PM
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Re: Dry time for 2 4 D

Quote:
Originally Posted by cnymowinplowinsailin View Post
I cant imagine going after my lawn with a backpack sprayer. Im pretty sure mine is on or off, so the only adjustment is speed and I suppose changing nozzles. I went as fast as I reasonably could and ended up about 10% over what I thought I should have used. Who knows if my assumption about portion that is lawn is off, overlap varied (guaranteed), ground speed variance over my control area (not sure I have a flat spot on my little over 3 acres) or some combination thereof. Either way, initial indicators looked pretty good this afternoon.

Next up is an aerator rental and then spraying some fertilizer. Is next weekend too soon?
One thing to do to get a better feel for the sprayer is to fill it with water and spray on blacktop or stone to see what speed you need to go to get good coverage. Keep in mine throttle position also to stay consistent.

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45 John Deere loader
Cat 1 3 pt plow and Heavy Hitch
62"powerflow
2019 X590 with 54" deck,power mulch kit and powerflow bagger
30" tiller,JD 18 cart
JD 40" spike aerator
12 suitcase weights
JD T105 trimmer
15 gal. tow sprayer
(2) JD JS63C walk-behind mowers
Turftime 60" roller
Turftime 54" 3pt core aerator
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