"I sprayed it on this
waxy-leaved, thorny vine (Greenbrier ?) that comes up all over my yard".....next time put a little dish soap in the sprayer, along with the herbicide....it cuts through a waxy coating on any plant.
I have used diesel in my sprayer before, and die back is just as good as with
glyphosate (the active ingredient in round up).
Now before anyone posts how environmentally disastrous this is, consider that glyphosate is not friendly either....but at least diesel is not a Monsanto product. Concentrated Roundup is 41% glyphosate...at what, $25 a quart, it is no bargain, the glyphosate link above shows 2.5 gallons of 41% glyphosate for $18....same potency....dilute at the the same rate...it's just that you are not paying for the horrendous Monsanto name.
Diesel, even cheaper, will not target the roots, but it does knock the plant back and will deprive the plant of oxygen.
The key to using diesel is to wait for a
hot, sunny day.
Regards
Gemstone1