On Sat, 26 Sep 2020 07:18:46 -0500, dpb wrote:

On 9/26/2020 1:24 AM, micky wrote:
In alt.home.repair, on Fri, 25 Sep 2020 12:29:24 -0400,
wrote:


That is basically Garlon (Tryclopyr).
It kicks Glyphosate's ass.

Mode of Action: Triclopyr is an auxin mimic or synthetic auxin. This
type of herbicide kills the target weed by mimicking the plant growth
hormone auxin (indole acetic acid), and when administered at effective
doses, causes uncontrolled and disorganized plant growth that leads to
plant death.

Sounds complicated, high-tech, and scarey!


Glyphosate kills plants by inhibiting
5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). EPSPS is a
key enzyme in the shikimate biosynthetic pathway which is
necessary for the production of the aromatic amino acids, auxin,
phytoalexins, folic acid, lignin, plastoquinones and many other
secondary products.

There are plenty of weeds that have found a way around that process. I
suspect Monsanto splices a gene from one of them into their
Frankencorn that is immune to glyphosate. I know I have weeds here
that it won't even slow down much. I don't know if it was always that
way or whether they have an acquired immunity. The south does seem to
be where somewhat benign weeds go nuts because of our longer growing
season, lots of sun and lots of water. Something that may seem like a
cute dish garden plant up north can become the weed that ate your yard
here. Snake Plant (Sansevieria trifasciata) is a good example. In
Maryland people loved them because it was a potted plant you couldn't
kill. Down here it is a weed you can't kill. Glyphosate has zero
effect on it, no matter what concentration. I have a hill covered with
it. It doesn't really bother me but I do spray for Cogangrass using
glyphosate at 2-3 times label concentration and the snake plant is
still there. It seems to like it.