A pair of marijuana users in Colorado — one of them a medical-card holder with a brain tumor — have sued the state's largest pot grower for allegedly using a potentially dangerous pesticide on the pot they later purchased. The lawsuit against LivWell Inc. by Brandan Flores and Brandie Larrabee seeks class-action status and alleges the company for years inappropriately used Eagle 20, a heavy-hitting pesticide with myclobutanil that kills a variety of pests endangering the plants. (See also: Colorado yields to marijuana industry pressure on pesticides)