PhylloTech LLC, spun out of the University of Wisonsin Madison, is an agricultural biotechnology company that develops natural product biofungicides and plant bioproduction systems. The company's new techniques for the sustainable bioproduction of proteins and other biochemicals in plants utilize specialized leaf surface structures called trichomes. The company's trichome bioproduction system can produce challenging targets and avoids the high costs of protein purification associated with competing systems by utilizing a natural method of purification from underlying plant tissues.