Thanks Tex for the clarification....
so pre-GMO it was strong chemicals to modify crops
i also came across this article, i am trying to confirm when it was published....
if you needed a reason to give up diary......
Abstract
A survey of 198 milk samples from a wide cross-section of NSW was conducted over three years for pesticide residue assessment. Extraction of pesticides was achieved using an initial methanol-etherhexane extraction followed by partitioning with acetonitrile and hexane; cleanup was competed using an aluminium oxide chromatography technique. The final analysis was made at the part per billion level employing a dual gas liquid chromatographic system fitted with electron capture-tritium source detectors. Results indicated that background contamination levels were; DDT, dieldrin, BHC, lindane and heptachlor epoxide were present in amounts comparable with those reported in previous overseas surveys. However, the fungicide HCB was found in 12% of the samples, this being significant in that the only other survey to report HCB was a French survey in which the reported levels in cow's milk were higher than those now reported. It was also established, in agreement with overseas reports, that the primary source of contamination was through stockfeeds which had been treated with pesticides prior to feeding
HCB = hexachlorobenzene.....