Basil downy mildew (IMAGE) American Phytopathological Society Caption A basil leaf exposed to nighttime darkness (left) shows plentiful spore formation, and a basil leaf exposed to red light (right; λmax = 625 nm; ≈60 µmol⋅m−2⋅s−1) for 10 h displays no spore formation of Peronospora belbahrii. These basil leaves were picked from whole plants that were exposed to nighttime darkness or red lighting. Credit Jaimin S. Patel, Christian A. Wyenandt, and Margaret T. McGrath Usage Restrictions N/A License Original 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.