The problem with the messages that ag chemicals send is that for good farming practices, we would like to do as little plowing and grubbing in our seed beds. Glyphosate ,bladex, gramaxon,diuron, metasulfuron and several others, are fairly broad spectrum weed killers that allow a farmer to burn down the weed patches and then to merely "Drill" the seeds into the ground. This keeps soil loss to a minimum and allows seeds to get a good startso that soils retain moisture and nutrients.
Ever since these ag chems have been available, weve changed our farming procedures in order to prevent soil erosion that Im not sure wed want to go back to the annual mud loads into creeks that accompanies seasonal plowing. (at least in the humid east).
The other problem is that many weeds have evolved a super immunity against several of these weed killers(withRoundup at thetop).In the areas where weve used "Roundup Ready" soybeans and cotton (GM modified soybeans and cotton seeds that are immune to Glyphosate), weeds were killed at about 99.999% (which left 0.001% of weeds with a natural immunity and this allowed evolution carving out a broader immunity via Hardy Weinberg type distributions of variability). Now, weve got supre Giant weeds that are a real pain in the ass to deal with in 1000acre fields. Theres a giant Amaranth that has developed not only immunity, but has evolved a huge ropy plant stem that can grow higher than the soybeans or even corn. The farmers of the midwest are now busy "flaming" many of these weeds to kill em.
NOW, to make matters even more complicated,Roundup has gone off patent. What before was a weed killer that had a pricey label, is now able to be produced in every third world country with an ability to do back engineering via "bucket" chemistry, and the prices of the third world glyphosate is about 1/10 the cost of Monsantos and SDUponts "ally". I can go into Tractor Supply and , what uswd to cost almost 200$ for 2 gallon jugs or 51% glyphosate, now costs 17.59$. SO, were buyin it cheaper and using it like water. It still kills most weeds and , with a secxond load of gramaxon or Ally, you can still do no till plowing. The problem is that this stuff is like DDT. The **** you target , soon develops an immunity, and then actually thrives on the stuff.
I only use Glyphosate in small amounts for pasture fence weed control and I follow up the weed stunning with a tractor mounted "flame thrower" (Its a homemade propane burner that I mount on the PTO and can aim by hand).
UI also use it on Rose bushes and volunteer bamboo ( abig problem around here lately) . Ill cut the stems and "paint a concentrated solution on the stem cross section before it can cuticle up).
Using it in a garden is not something Id recommed, especially if youre gonna eat the veggies. I used to be a fan of Glyphosate but have changed my mind with food plants and gardens. Especially becase of the persistence of the molecule breakdown products.
If ya didnt want me to go on like a used car saleseman you shouldna asked a question about somethin Im interesetd in.