Summary
1. Light is not essential for the formation of stipes from sclerotia, which can be formed in total darkness, but no apothecia can develop from them in the absence of light.
2. A daily photo-period of 12 hours is quite adequate for the normal development of apothecia.
3. As regards the quality of light, white is the best and green and red lights are very poor and blue light is the worst.
4. Constant illumination is not harmful.
5. An intensity of illumination amounting to 12 to 14 foot-candles appears to be quite adequate.
6. Adequate aeration is extremely important for the development of normal apothecia.
7. Burial of sclerotia, whatever its depth, is deleterious to apothecial formation, which is best only on the surface of the substratum.
8. Sclerotia do not germinate and form stipes unless they are in actual contact with water. Contact with free water, however, must be partial and not such as to completely submerge them, in which case only stipes and no apothecia are produced.
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Communicated by Prof. T. S. Sadasivan,f.a.sc.
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Bedi, K.S. Light, air and moisture in relation to the formation of apothecia ofSclerotinia sclerotiorum (Lib.) de Bary. Proc. Indian Acad. Sci. 55, 213–223 (1962). https://doi.org/10.1007/BF03052308
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DOI: https://doi.org/10.1007/BF03052308