When did he claim that this was a scientific experiment? His point about “drenching” is already backed up by evidence. https://www.geneticliteracyproject.org/2015/01/22/gmo-myth-farmers-drown-crops-in-dangerous-glyphosate-fact-they-use-eye-droppers/
http://acsh.org/news/2014/11/06/meta-analysis-shows-gm-crops-reduce-pesticide-use-37-percent