[bduerst]

Monocropping is an agricultural method that predates GMO technology, so please don't attribute it to GMO. Same with only using herbicides that work.

https://en.wikipedia.org/wiki/Monoculture

[Spooky23]

I'm not familiar with crops that were bred to be immune to broad-spectrum herbicide prior to GMO seed development.

Do you have any links describing those crops and practices?

[bduerst]

B73 hybrid maize was bred to be resistant to herbicides primisulfuron and imazethapyr, for starters.

I recommend you read up on the long history of hybrid crop breeding in the U.S. during the 20th century, if you actually are genuinely interested and not just trying to hold onto an untenable opinion about GMO technology.