I would say this is not true. I don't use anything in my garden except for natural homemade compost and haven't had any bug infestations. I rotate crop placement somewhat each year, and pull the weeds by hand as I have time. Produce does not need chemicals to grow, it needs minerals present in the soil which can be added with compost, chemical fertilizers or organic fertilizers. Chemicals are not needed to control bugs when you grow properly and use beneficial plants and insects and rotate items and use the right seeds. Most seeds today are hybridized to withstand and need more chemical use. I have friends who have organic farms and have seen what they use, they use fertilizers that I would not, but they don't use pesticides, also the seeds they use are mostly heirloom or saved, not the adultered hybrids used for regular grocery store produce. If I can't grow it myself, I trust Organic produce 2nd because no matter what, far less chemicals are used and it's good for the land.