Sorry a question what do you mean when you say the city came and sprayed your yard with glyphosate? can they just spray where they want? I would close the whole fence with wood to prevent the spraying from the outside, if that were the case.
City or county will spray their right of way. Ditches sidewalks etc. Some will say they have jurisdiction over the whole yard for noxious weeds, which is an entirely different problem.
You need to go ask them what EXACTLY they did use. It could have been something that doesn't affect fireweed, or it could be they just created a new monster weed in your area. But either way they need to change what they do because they are making it worse.
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They came and sprayed the alley and the edge of my frontyard with something (which I am told is "like roundup"). Someone at the city told me they'd get back to me on what it is but haven't yet; I'll have to go back and bother them.
There is a chain link fence around the backyard and there was tiny amounts of weeds in the alley. In the front there is no parkway or anything that they even had reason to spray - the only thing I can think of is they thought the house was still unoccupied, it had been for 10+ years. I was told by the guy at public that it isn't something they are supposed to do.
I do have the spraying on camera, as well as showing the effects on places they sprayed, and the discussion at city hall. I've learned that when dealing with government officials if its not on camera it never happened (coincidentally I made the down payment on the house because the city had to settle with me over a "controversial arrest.").
As far as it not affecting fireweed, I don't believe they would intentionally use something that didn't. This is an agricultural area, and kachia is the most prolific weed here. They spray killed everything EXCEPT the weeds.
My readings on it indicated that glyphosate resistant kachia is now making an appearance in this or that state and is causing huge problems for industrial agriculture, and the city guy said it is glyphosate spray.
The came and sprayed again, but at least didn't do my yard. Despite that I had been pulling the weeds in the alley.
Someone on another thread suggested that what is shown in the video was seeds that had sprouted after the spray had dissipated. Today the I looked at the two day old spray job and the grass was freshly dead and the kochia still two inches tall.
Glyphosate resistance has been documented for a while. Coincidentally, I got the new issue of Good Fruit Grower at work today, a regional industry publication, and it had a piece on glyphosate resistance, and I guess there's something like 40 known roundup ready weeds, including kochia. Too bad for them.
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