Weed Killer Recipes

[California]

Does anybody know the shelf life of Roundup? I'm working through the last pint I found here in Dad's jumble of yard sale purchases. He must have found it 1999 or prior but he wasn't its first owner. No telling how old it is.

I mixed up a batch and sprayed a few ivy runners that had sprouted down in the ravine where we had dumped them as gardening debris. I don't want to see ivy get started down there. Two weeks later the poison oak and Himalayan Blackberry I also sprayed look sickly as expected, but the ivy looks like I fed it Miracle Grow. Bright green and I swear there's more of it.

How do I eradicate the ivy, and how long does Roundup stay potent after the bottle has been cracked open? Would mixing it double the label recommended maximum do the job?

 

[Spiveyman]

You were right about that 2 week deal on the Round-up Pro with mature vines. I was out there Sunday and the weeds/vines are starting to look pretty bad (which is good). We're getting rain today, so hopefully that will kick off some more growth which should allow the Round-up to work better. I'll also still get some of the crossbow stuff.

California - don't know about the shelf life, sorry but there are some pretty good recipes in this thread. I killed a vine of poison ivy in the yard by the house this summer, took two sprayings with the "household" version - not the concentrated stuff - but it worked pretty fast. Don't let that stuff get a foot hold. KILL IT!!!

 

[California]

Ok this isn't working.

After another week: My maximum-recommended Roundup mix is killing the Poison Oak (red) and Himalayan Blackberry (pale green) but the Ivy I'm targeting the spray on, loves it.

Any advice?

View attachment 86046​

 

[Cottonhawk]

"....Make sure you add the detergent after filling up the sprayer or you'll have a mess....."
Did you learn it from experience? LOL!

 

[ultrarunner]

Never had much luck with ivy... the leaves are very waxy and seem to be very resistant unless I get them early in the spring...

 

[reelrunner]

The spring is the best time to spray but in late fall plants will go through a growth before the sap is down. I use 1oz glyfos. to the gallon for weeds and 2oz for brush. For waxy leaves use a little detergent as a surfactant or you can even use a little cooking oil. If possible spray the bottom of the leaves of waxy plants. Also do not give up on the glyfos. I have sprayed brush that took as lond as 3 to 4 weeks to show signs it was working and later go back to find it did a good job. I have also used the 2,4-D. It is good if you have broad leaves growing in grass, and don't want to kill the grass. The glyfos. will kill almost anything if you get a good cover.

 

[California]

For waxy leaves use a little detergent as a surfactant or you can even use a little cooking oil. If possible spray the bottom of the leaves of waxy plants .... The glyfos. will kill almost anything if you get a good cover.

Thanks! The Ivy being resistant due to wax never occurred to me. This week I'll add detergent, and try to get under the leaves.

 

[Rara Avis]

I have another question here. Sure enough I have checked the fence line all week with little sign of any effect of the 10% solution of Round-up. Will that stuff even work in the fall when the weeds aren't as active? Will any of the other ideas out there work when the weeds are less active like now?

Thanks

This will clean your fencelines without the herbicide...

Swisher Mower & Machine Co.: Postmaster

 

[Spiveyman]

A few weeks into this thing I can report that the Round-up has worked very well. I can see a couple spots that I missed, but about 2 weeks after application I could really see a difference, and now I have alomst total annihilation!

I like this rout better than trimming the stuff because it's supposed to get the roots rather than just the above ground portion.

 

[teg]

Just remember that shallow rooted trees (like dogwoods) can be killed if you spray too much RoundUp under their roots/canopy (don't ask how I know ) A little RoundUp goes a long way, you don't have to soak the leaves, it just takes time (and the plant needs to be growing somewhat - don't try and kill it in the Fall).