Glyphosate (RoundUp or similar)

[Splaker]

What is the highest concentration of glyphosate weedkiller sold in Ontario (Round Up or other gneneric brands). I know you can get the stuff at 50% in the US. What is the highest here for over the counter hone use?

thanks!

[smitty55]

Not sure of the actual concentration but the farmer's grade is mixed at a 50:1 ratio. 350g/l Regular store bought concentrate used to be mixed at 40:1. The premix is 1/50th the strength of the super concentrate. 7g/l. The concentrate sold now in Ontario is mixed at 20:1 so not near as strong. If you're looking for a strong mix best to talk to a farmer.

Cheers

[benjhind]

I'm no pro, but I think most agricultural formulations are 50%. You need a licence to buy them.

You don't need a licence to buy the pre-mixed stuff that is 1% but there are restrictions. I think you have to ask for it (not usually on shelves) and it is supposed to be used only on poison ivy or giant hogweed.

[patvetzal]

It doesn't work on Japanese Knotweed.....if that is your problem.

[Splaker]

It doesn't work on Japanese Knotweed.....if that is your problem.

Got a lot of things I need to kill.. the problem is, cutting them down doesn't go far enough... I've researched it and herbicides need to be sprayed on stumps. Everything I want to kill suckers... Box elders, Lilacs..etc... i cut them and it' sprouts back up again! even grounding stumps won't get em all... Lilacs are a real PIA.. Don't understand why they are so popular... they look nice for 5 days then look like crap rest of they year and the sucker though my interlock, patio, everywhere...

got to befriend a farmer who'd sell me a few gallons of th really strong stuff.. anyone? or I could go to the US. I think they sell the 50% stuff

[Splaker]

and my dumb neighbour has box elders all along the fence... they grow through my fence and encroach onto my side...hate those things, too...

[benjhind]

If you are painting stumps I'd go with garlon over glyphosate, but glyphosate will work at 50% in a pinch.

[Splaker]

Once I get my hand on the strong stuff I am going to try the hack and squirt method.. you take an axe and cut into the wood in a downward direction then spray the tree so they die - roots die and no suckers should emerge.. sometimes a few applications are needed... it's a quick way to kill a lot of young trees

[jaycee]

An old farmer friend [now long gone] used to make his own weed/vegetation killer by mixing Gillets Lye, Salt and Strong Vinegar, this concoction killed every thing.
I do not know what ratio he used, but I do know his fence lines were always clear of any type of vegetation.

[dutchhunter]

My farmer buddy gets the 3way
It kills all broad leaf and is a 50 to one mix.hsrd to get without the proper lic