1. Beecher, F. S. 1945. Light and composition of media as factors inducing sporulation in strains of Alternaria solani. (Abs.) Phytopathology35: 483.
2. Firky, A. 1932. Investigations on the wild diseases of Egyptian cotton caused by various species ofFusarium. Amer. J. Bot.46: 29–70.
3. Harter, L. L. 1939. Influence of light on the length of conidia in certain species ofFusarium. Amer. J. Bot.26: 234–243.
4. Harter, L. L. 1951. A personal element and light as the factors in the study of the genusFusarium. J. agric. Res.62: 97–108.
5. Houston, B. R. &Oswald, J. W. 1946. The effect of light and temperature on conidial production byHelminthosporium gramineum in culture. Phytopathology36: 1049–1055.