Evaluating Highly Polymerized Tannin as a Sustainable Biopesticide for the Management of Major Potato Diseases

Potatoes are a cornerstone of the Pacific Northwest’s agricultural economy but face constant threats from a range of plant diseases. Traditional chemical pesticides, while effective, pose environmental and human health risks, driving interest in sustainable alternatives. This project explores Kaki-tannin, a highly polymerized tannin from persimmon fruits, as a biopesticide to combat major potato diseases like late blight. Distinguished by its high molecular weight compared to other tannin compounds and known for both antimicrobial properties, Kaki-tannin offers a unique opportunity for ecofriendly disease control. We will conduct controlled greenhouse and field trials to evaluate its efficacy in reducing disease incidence and severity, alongside assessing its impact on potato growth, yield, and soil health. The outcomes of this research aim to offer growers a cost-effective, sustainable alternative to chemical pesticides, contributing to environmentally responsible pest management strategies in potato fields.