stump killing questions help

[struggle]

I am clearing a lot of fence trees and terrace trees for a farmer and am wondering what the difference is between Tordon RTU verse the 22K. 22K looks to be more concentrated.

RTU is getting expensive fast in the small bottles. Trees are being cut near flush and then treated with RTU on the surface right after cut.

22K is restricted but far more cost effective in size. Can it be effective if diluted when bought in 2 1/2 gallon size or is it better to use full strength?

Trees being cut range in size of 1" to 24". cotton wood, mulberry some weaping willow is mostly what I am seeing.

For years on the fields they have cut the trees down only to have them spring back up into monster nightmares to cut down with multiple trees out of one. Need to get them down and keep them down.

 

[imagineero]

I use glyphosphate at a concentration of 360g/l on all big stumps I do. This is the most common concentration for agricultural use and is available cheaply and in bulk. You can buy it in liquid for ready to go, or as a powder and mix it yourself. I use it on stumps right up to around 8 feet in diameter with a 100% success rate over the last few years, though I re-apply after a few weeks with vigorous species like liquid ambars. If you dont you end up with suckering coming up from the roots.

I apply immediately after felling, and only apply to the outside ring of the stump with a sprayer. This is a very economical way to apply and uses very little chemical. I get about 7 or 8 large (over 5' diameter) stumps to a litre. I use a pressurised 1.5L sprayer with a hand pump to pressurise it. It's accurate and I dont need to bend over to apply. You can adjust the jet to be a fine needle stream.

For smaller stuff I water it down to 120g/L. It's still quite effective at this concentration, standard roundup is only 7g/L. Glyphosphate is generally more pet/human/livestock friendly than most of the other strong herbicides, even at high concentrations but take care to avoid runoff into water sources. Look at your slope and distance to rivers, creeks and dams. It gives water critters a hard time.

Shaun

 

[whiskeyjack59]

Shaun:

Did ya mean Glyphosate (N-(phosphonomethyl)glycine)? Sorry to correct but I couldn't find glyphosphate anywhere.

Thank you for the advice.

 

[imagineero]

you got it ;-)

Shaun