Monsanto slapped with $10M fine after using banned pesticide on Maui AFTER it was banned Monsanto must pay $10.2 million in fines as part of a guilty plea for spraying a banned pesticide on research crops growing in Hawaii as the lawsuits continue to pile up against the company over its dangerous practices. The pesticide in question, Penncap-M, was stored by Monsanto at sites in Maui and Molokai, according to a press release by the Department of Justice. It was also used at Valley Farm in Maui. It is considered an “acute hazardous waste” and the company boldly continued to use it in 2014 despite being aware that its use was prohibited after 2013.