Field Bean Plants (IMAGE) Martin-Luther-Universität Halle-Wittenberg Caption The differences are striking: both field bean plants were exposed to spores of the fungus Uromyces viciae-fabae. The plant on the left is untreated and the fungi are clearly visible. The right plant was treated with the acid, the fungus could not cause any damage. Credit Perino et al. in Phytopathology Usage Restrictions Use with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.