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Herbicide question?

2.1K views 61 replies 24 participants last post by  1917-1911M  
#1 ·
My neighbor gives me a gallon of herbicide every so often, I mix and use it in my 5-gallon backpack sprayer.
Having ample of this stuff, I've been over mixing it.
Is there such a thing as mixing in too much, the weeds sure aren't dying like they should.

Thanks for any input. (y)
 
#2 ·
What is the herbicide? Are you mixing it according to the label, and applying it to plants listed on the label?
I use 41% glyphosate from Tractor Supply, mixed according to "brush and poison ivy", and I clear walkways, along tree lines with it. It takes a week or two, but it all dies for the year. By overmixing, if you mean stirring or agitating it too much, I think NO. I slosh it around in a big tank behind a tractor.
If you mean mixing it too strong, my product says you can pour it on stumps full strength.
 
#5 ·
What is the herbicide? Are you mixing it according to the label, and applying it to plants listed on the label?
I use 41% glyphosate from Tractor Supply, mixed according to "brush and poison ivy", and I clear walkways, along tree lines with it. It takes a week or two, but it all dies for the year. By overmixing, if you mean stirring or agitating it too much, I think NO. I slosh it around in a big tank behind a tractor.
If you mean mixing it too strong, my product says you can pour it on stumps full strength.
"Mixing it too strong". When I was buying it, I was measuring it. 😁
Getting it for free, I just pour in a bunch.:whistle:

I don't know what brand it is???
 
#28 ·
Rosscoe is just contrary enough to show us the difference between "can't" and "shouldn't" Rick :pirate:

This whole thread is defective anyway.

Unknown liquid, who knows how old, possibly stolen, purported to be weed killer....

Mixed in unknown ratios and applied to unknown vegetation....

"Do you fellas think I'm doing it right???"

...man I'm having trouble keepin' a straight face right now :p

Phrank
 
#14 ·
Roscoe -

How old is the product your neighbor gives you? I once left a 2.5 gallon jug of 41% glyphosate in an unheated tractor shed over a winter and it seemed to me that the freezing cold had a negative effect on the product when I used it the next summer.

These days, I buy glyphosate the in the Spring and use all of it that year. Also, I mix it about 33% stronger than the label recommends.

I used to mix in a small amount of ammonium nitrate but since I apply it almost immediately after mixing, I save that money now.
 
#22 ·
whistlepig -

I think you are correct in your comments about Tractor Supply generic 41% glyphosate. Probably not the best quality product but I can't find the product cheaper. It seems to me that over the last two decades or so, tractor supply glyphosate has become less effective. Plant resistance to the product may be a factor too.

I will, however, scope out Round Up ProMax later this Spring and try to compare costs vs. quantities.
 
#24 ·
White vinegar, dawn dish soap, salt, water.

Mix and spray.

Homemade Weed Killer Recipe
Ingredients:
1 gallon white vinegar (5% acetic acid)
1 cup salt (table salt or Epsom salt)
1 tablespoon Dawn dish soap (or any liquid dish soap)
Instructions
1. Mix
In a large container (like a gallon jug or garden sprayer), pour in 1 gallon of white vinegar.
Add 1 cup of salt and stir until it dissolves.
Add 1 tablespoon of dish soap. This helps the mixture stick to the plant leaves.
Pour the solution into a spray bottle or garden sprayer.
2. Spray
grass.
Spray the mixture directly onto the weeds or unwanted
Choose a hot, sunny day for best results.
Avoid spraying on plants you want to keep-the solution is non-selective and will damage any plant it touches.
3. Wait
Within hours, you'll start to see the leaves wilt and brown.
Full results are typically visible by the next day.

This is a nature friendly weed killer. No long term effects to the environment later on to run of when it rains.
 
#53 ·
White vinegar, dawn dish soap, salt, water.

Mix and spray.

Homemade Weed Killer Recipe
Ingredients:
1 gallon white vinegar (5% acetic acid)
1 cup salt (table salt or Epsom salt)
1 tablespoon Dawn dish soap (or any liquid dish soap)
Instructions
1. Mix
In a large container (like a gallon jug or garden sprayer), pour in 1 gallon of white vinegar.
Add 1 cup of salt and stir until it dissolves.
Add 1 tablespoon of dish soap. This helps the mixture stick to the plant leaves.
Pour the solution into a spray bottle or garden sprayer.
2. Spray
grass.
Spray the mixture directly onto the weeds or unwanted
Choose a hot, sunny day for best results.
Avoid spraying on plants you want to keep-the solution is non-selective and will damage any plant it touches.
3. Wait
Within hours, you'll start to see the leaves wilt and brown.
Full results are typically visible by the next day.

This is a nature friendly weed killer. No long term effects to the environment later on to run of when it rains.
I have tried this and it's very expensive. Also the salt will destroy the pimp on your sprayer(s).
 
#27 · (Edited)
My neighbor gives me a gallon of herbicide every so often, I mix and use it in my 5-gallon backpack sprayer.
Having ample of this stuff, I've been over mixing it.
Is there such a thing as mixing in too much, the weeds sure aren't dying like they should.

Thanks for any input. (y)
Yup. If you mix the proper amount or less they may die. Mix over and they grow. The chemical companies figured this out that most guys will make a stronger mix. So they will have to keep buying the product. It's science. ;) After all the crap chemicals I've used in my life I'm at the point of using as few or none as possible now..
 
#30 · (Edited)
Many or most of these are the same base chemical. To answer your question I double the concentration. That seems the best trade off in effect vs cost vs my time. Since you get yours free then definitely double dose is the way to go. I wish I got mine free :( I would probably up the mix concentration even more.

I read this all again and seems most of the reply is either OT or over thinking. If the OP does not like the the effect just double the concentration and see how that works. This is not brain surgery. Why ask him questions or talk about paying money for Round Up ($$) when his is free???