“We also know that the plant then produces the toxin 1000s of times more than would ever be used as a topical pesticide.”
https://gmoanswers.com/ask/cry1ab-toxin-corn-pollen-pregnant-women
The amounts of Bt protein produced by all crops combined in the U.S. on an annual basis is much lower than the amount of chemical sprays used, to the point that it doesnt contribute much to the total pesticide use.
From The Council for Responsible Genetics represents the public interest and fosters public debate about the social, ethical and environmental implications of genetic technologies.
Founded in 1983, CRG is a non-profit, non-governmental organization based in Cambridge, Massachusetts.
CRG works through the media and concerned citizens to distribute accurate information on emerging issues in biotechnology. CRG also publishes a bimonthly magazine, GeneWatch, the only publication of its kind in the nation.