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Did the Roundup work?


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#1 zandstrafarms

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Posted 20 April 2017 - 12:53 PM

Last week Friday I sprayed 10 acre mixed grass hay field at the rate of 1 quart per acre, and 2 acre empty field (previously teff)now weeds and cool season grasses creeping in, at same spray rate.

Mix was 20 gal water with one quart roundup plus 1.75 cup dish soap. This was recommended online to help the killer stay on the plant. This was done for each acre.

Grass was greenish, but still low, maybe 3in tall? Sprayed on sunny 60 degree afternoon with rain late evening.

How do I know if it's working? The grass only appears slightly yellowed near base of plant.

I plan to fire burn killed stuff, then light till of top 2 inches then seed orchard grass with brillion style seeder and cultipacker.

Like to plant early May, so I need to know if my grass is sufficiently sprayed to die!

What's the time frame with signs?

#2 reede

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Posted 20 April 2017 - 12:59 PM

Lots of times takes 2 weeks to really notice with glyphosate


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#3 slowzuki

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Posted 20 April 2017 - 01:12 PM

Yup, give it time

#4 haybaler101

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Posted 20 April 2017 - 01:14 PM

Next time, use less water (10-12gal) and add 2 lbs of AMS per acre. Ammonium sulfate is the key to making glyphosate work.
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#5 zandstrafarms

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Posted 20 April 2017 - 01:23 PM

I heard the dish soap dies the same thing as the ams...

#6 zandstrafarms

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Posted 20 April 2017 - 01:24 PM

*does*

#7 zandstrafarms

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Posted 20 April 2017 - 01:24 PM

So do I need to wait 2 weeks to burn and prep the field for planting then?

#8 r82230

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Posted 20 April 2017 - 01:25 PM

We had some warm weather over the weekend here in Michigan, but it's cool down since.  So, with some yellowing I would guess it's working (killing the weeds/grasses), just slowly.  That slightly yellowing is usually a tell-tale sign.  With my experience the faster grass is growing the faster the kill.  Be patient, roundup isn't like 2-4d on noticing a quick kill.

 

Larry 


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#9 r82230

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Posted 20 April 2017 - 01:27 PM

So do I need to wait 2 weeks to burn and prep the field for planting then?

I say no, you don't have to wait, but I would just to give roundup a little more time to work (plus it's raining today, at least in my part of Michigan).

 

Larry



#10 zandstrafarms

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Posted 20 April 2017 - 01:36 PM

Right on Larry. I won't plan a burn until I get our seeder reserved, a soil sample done and fertilizer on order. I just know I'm crunching on time for spring planting is all.

We're on the western side of MI, so we got flooded with rain :(

#11 mlappin

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Posted 20 April 2017 - 02:28 PM

We use 28% in place of AMS, but yeah, take s awhile to really notice it’s dying.



#12 rjmoses

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Posted 20 April 2017 - 03:36 PM

Same as everybody else--give it time.  RU is basically a growth inhibitor, i.e., it causes a plant to starve to death.   You're in a cooler area and plants need to be actively growing for RU to work.

 

Ralph


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#13 Vol

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Posted 20 April 2017 - 05:26 PM

You can perform tillage 5 days after spraying.....and the degree of turning from green to yellow is very much temperature related. If its nice and warm you will see obvious yellowing in 5 days.....if you are experiencing very cool nights it might take 10-14 days. Here we can spray in December but it takes 2-3 weeks to see obvious signs of yellowing at that time of year.

 

Regards, Mike


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#14 Wethay

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Posted 21 April 2017 - 01:55 PM

It's not going to die, get your sprayer ready to go, buy new spray, take time off work, majorly complicate your life and it will go from maybe a bit sick to dead in a couple days. 






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