1. Blencowe, J. W., and Wharton, A. L., Rep. 6th Commw. Mycol. Conf. Kew, 139 (1961).
2. Grimaldi, J., Rep. Cocoa Conf., London, 90 (1957).
3. Okaisabor, E. K., Nigerian Agric. J., 2, 67 (1965).
4. Strickland, A. H., Rep. W. Africa Cocoa Res. Inst., 1947-48, 33 (1949).
5. Thorold, C. A., Nature, 170, 718 (1952).