Q: What's worse than glyphosate?

[wtg]

A: Its replacement, diquat.

https://www.theguardian.com/environment/2025/jul/06/weedkiller-diquat-organ-damage-study

[Bernard]

I think my experiments with Roundup are over. For all the hype, I found it only moderately successful for the job I had tasked it with. One area has been cleared quite well, but it was a struggle even with the Roundup and took more than one application.

[rustyfingers]

Only time I used it was for poison ivy and Japanese knotweed. For the latter I cut it to ground level and paint the stuff on the cut edge with a small paintbrush.

[Nina]

I've used Roundup to eradicate Bermuda grass lawns and convert to desert/native plants. I wouldn't touch it now.

The alternative is to cover the lawn in black plastic in the summer (April through September in Arizona!) and basically kill it by drought and heat.

[rustyfingers]

You can use cardboard too, at least here you can