VIEW ARTICLE

Experimental Control of Late Blight of Tomatoes with Capsidiol, the Phytoalexin from Peppers. E. W. B. Ward, Agriculture Canada, Research Institute, University Sub Post Office, London, Ontario N6A 3K0; C. H. Unwin(2), and A. Stoessl(3). (2)(3)Agriculture Canada, Research Institute, University Sub Post Office, London, Ontario N6A 3K0. Phytopathology 65:168-169. Accepted for publication 2 August 1974. DOI: 10.1094/Phyto-65-168.

Capsidiol, the phytoalexin from peppers, applied in solution in water as a spray to tomato plants, effectively controlled late blight at concentrations down to 5 × 10^–4 M, under growth-room conditions. The compound effectively protected plants for at least 8 days, the longest period tested. These experiments demonstrate the potential of phytoalexins as sources of new fungicidal compounds.