Tarlo_Farm You are a danger to yourself and others, not knowing your herbicides!! They each are made to do specific things when applied correctly. Do you even read the labels and precautions for mixing and applying, proper clothing and gloves?? Getting two or three such products confused is going to hurt you and possibly others, water systems on down the road. You don’t seem to have a clue what you are dealing with!!
Glyphosate/Roundup is a foliage killer, any and all plant life that is not naturally immune to it. Grass, weeds, it does not care. Good new is that it starts disapating in 24 hours.
The 2-4 D products are broadleaf weed killers. They do not bother various grasses. They DO leave residue on the plants, in the soil. Part of the reason for not using horse manure in your garden, the residue will harm/kill plants, even after composting.
There are other chemicals in herbicides not named here, which can also be long term lasting, leaving residue in the soil or plants. Repeated use of the glyphosates on the same areas can change the soil to acidic.
Having unknown chemicals sprayed on your land is rather horrifying to learn!! Could be any weird mix of stuff he had laying around!! OP has her hands full with this nutjob. I hope she can call and ask what he used, get an answer. Not sure testing after several days will tell her much.
The $1000 claim is kind of odd. Prices of both fertilizer and herbicides have jumped. I am looking at double the cost of fertilizing now as I paid last year. Might go higher if I have to wait very long. Herbicides have tripled at TSC for the 5 gallon containers.
I would not be paying him anything, and would counter his claim with costs his sneaky visit created. And being neighborly now is out of the picture. I agree that he is trying to bully OP into letting him use the land, sell any hay he makes. You can bet he won’t make any good hay on shares at the proper time, it will be junk. So glad we never had these kind of issues to deal with! We had “other things” but nothing like this. Spend the $1000 on a good lawyer, get farmer stopped right away and warned off the property.