Myclobutanil and cannabis have both existed a long time, but this problem never came up until legalization in Canada a few years ago, and the USA more recently. People never used it on cannabis until big companies began trying to drive the price per gram down. Trying to say it has something to do with the illegal/unlicensed/free/black/unregulated market is really misguided. Time and time again, it's legal companies doing this to people. We used to "know your grower" but that was made impossible by "legalization", and now there's poison in the legal supply and people are dying.