Broadly speaking organic pesticides are more harmful to the environment, both with the intensity that they're applied and that they're broad spectrum compounds that affect a variety of species that may not even be considered a pest for that particular crop. Also at least in North America there was a study of produce in Canada about a decade ago that showed around 50% of organic produce tested positive for synthetic pesticides, because the organic variants often times just don't get the job done and farmers aren't going to just watch their income turn to mush. Coupled with the absolute dearth of inspectors that are supposed to test for this kind of stuff I just have a general vibe that the organic label is largely nothing more than a way to charge double for the same product.