I thought it was the other way around: GMO gives you better selectivity, meaning you can use less pesticide to get a given yield?
I can't speak for glyphosate, but for Bt I seem to remember that you need 10x or 100x the concentration if you spray it on account of not being able to distribute it perfectly evenly.
I can't speak for glyphosate, but for Bt I seem to remember that you need 10x or 100x the concentration if you spray it on account of not being able to distribute it perfectly evenly.