Glyphosate

john in la · Jul 29, 2023

How weak of a mixture of 41% Glyphosate can I go to kill lawn grass and weeds with a decent kill and not cause problems.
My back does not allow me to use a weed eater so my only option is to spray around tree trunks and along the fence and other obstacles the mower can not get to.

Geo-TH,In · Jul 29, 2023

I recently bought 2.5 gallons of 41%.
Instructions said 1-2% for most weeds and grass.

I just sprayed 2% a few days ago. Still waiting to see any positive results..
In the past it would take 4-6 days to see weeds stressing.

If there is a next time, I may increase mixture to 3 or 4%

muleman51 · Jul 29, 2023

I'm not a good one to ask. I use the glug method of measuring, You no know two glugs to two gallons water. not very accurate.

john in la · Jul 29, 2023

Instructions on bottle are not very clear and I have seen 1.5 to 5 oz per gallon online.
Hence the reason I ask the question.

rrlund · Jul 29, 2023

I use a quart to 20 gallons in the field, so reverse engineer the math.

redtom · Jul 29, 2023

I use 3 Oz per gallon. And it takes a few days to show.

tomturkey · Jul 29, 2023

I know it is supposedly inert once it hits the soil, but I had a tree die after we had been spraying glyphosate around it to eliminate the mow around problem. I don't know what killed the tree, we just don't spray any herbicides around the trees anymore. It just takes too long to grow a nice tree. We still spray fencelines and the driveways and around up next to the bldgs. As far as mixing, read the instructions and add a little bit more has been my norm. gobble

Richard G. · Jul 29, 2023

I use about 2 oz per gallon and it does a good job.
Sprayed a week ago and grass and weeds are yellow now.

Butch(OH) · Jul 29, 2023

When it's hot and you have good soil moisture it will kill quicker with a weaker mix. I adjust accordingly from 1 oz per gallon when hot and damp to 2 oz per gallon in EITHER cool or dry conditions. The grass and weeds do not have to be drowned with the mix. The vast majority of people vastly over apply when using hand equipment. Doesn't hurt anything except the pocketbook I guess?

Butch(OH) · Jul 29, 2023

Exactly! Do not believe that RU products won't harm trees. We have a small orchard here, Apple and Pear trees. I was told it was harmless to trees so I sprayed around all of them, not being careless but not extra careful either. A week later the leaves all stated to brown amd roll up. That was 5 years ago. Didn't have fruit for 2 years and was ready to cut them all down. The Apple trees have mostly recovered, lost two out of four Pear trees.

sixbales · Jul 29, 2023

Me too. I use 3oz/gallon. Works well.

stoughtonfarmboy · Jul 29, 2023

I figure if I can't get it with the riding lawnmower it deserves to live.

I do use a string trimmer around the dog kennel.

Ken

38 Sears Roebuck · Jul 29, 2023

First off I have nothing against using Glyphosate or any type of weedkiller. However I have found that using Vinegar with a splash of liquid laundry detergent mixed up in the sprayer works great!

Stephen Newell · Jul 29, 2023

It's my understanding that glyphosate doesn't normally kill established trees but it's certainly not good for them. Accumulative use gets into the soil and damages the root system. Because of that it's sometimes used to kill young saplings. If it were me I wouldn't use it around a tree you wish to keep.

Steve in VA · Jul 29, 2023

I agree. Thats the recipe I use around the house because of the dog. If I'm spot killing in the field I use glyp.

john in la · Jul 29, 2023

Any recommendations of what will kill grass around trees without harming the tree.

john in la · Jul 29, 2023

Just regular white vinegar???

Mixing rates???

mtf · Jul 29, 2023

We use glyphosate to spray under the rows of trees in our nursery. We do use a hooded sprayer, because glyphosate will burn the bark of trees under certain conditions. That would be unacceptable for us, hence the spray hood. There is no problem of the roots absorbing chemical, r-up does not work like that.

Bob Bancroft · Jul 29, 2023

I've heard to add epsom salt also. Don't know how much.

38 Sears Roebuck · Jul 29, 2023

Yes, just regular off the grocery store shelf vinegar. You can buy a higher acid content vinegar if you want but it comes with a higher price. I usually find it on sale in the grocery store on sale for a little less than three dollars a gallon. I usually just add about 6 to 8 oz. of liquid laundry detergent to a gallon of vinegar.

Glyphosate

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