That REALLY sounds like way more was in the mix than std. Roundup. I use Roundup at fairly high strength on my Mom’s brick patio & brick sidewalks and the weeds & grass are dead in a week... and then new growth is back in another month or so. So I spray it again. The ants residing there seem unaffected. Ditto the results for the weeds & grass that grow in our gravel driveway or pretty much anything else I’ve ever used it on — exception being if I hit an area in, oh, say late July, and we get no rain until late Sept., said area will be pretty sparse until the following spring. Now, poison ivy along the trail @ the east end “woods” of our property takes several months to come back, but usually other stuff like hickory trees planted by squirrels replaces it. I more often use 2-4-D on the ivy, anyway.
The weeds in a small soil area (not in the woods) that I used Roundup on last early-June “died”, but now has 2 -3 ft. high grass & weeds in it. We can compare pics if you’d like!)
That field across the road from us: In fallow years, it grows (mostly grass) just fine. But that same vegetation is heavily suppressed in the corn & soybean years due to those years’ Roundup sprayings.
You can blame Monsanto (easier?), but I think it’s your neighbor at fault... Roundup alone, at anything close to recommended mix ratios, just DOESN’T cause even a 1 year dead zone, much less 4 years.
Nope.
The jug was in his truck.
Off the shelf.
Like it or not.