598 
Journal of Agricultural Research 
Vol. XXVIII, No 6 
The differences between Botryosphaeria and Physalospora, as the names are 
used here, are the apparent difference in life histories, the first having Dothiorella 
as its pycnidial stage and the second Sphaeropsis as its pycnidial stage and the 
difference in ascospore sizes. 
The ascogenous stages of Botryosphaeria ribis and Physalospora malorum may 
be distinguished by size of ascospore, method of germination of ascospores, and 
by certain cultural characters. 
The fungus on apple in Africa described as Botryosphaeria mali by Putterill is 
apparently identical with the physiological variety of Botryosphaeria ribis G. 
and D. which the writers call chromogena. 
The fungus commonly found on apple in this country which has Dothiorella 
as its pycnidial stage and closely resembles that from Africa in morphology, but 
is nonchromogenic, is apparently identical with Botryosphaeria ribis G. and D. 
LITERATURE CITED 
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SIGNIFICATO ATTRIBUITOGLI DA PERSOON. Comm. Soc. Crittog. 
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(2) Grossenbacher, J. G., and Duggar, B. M. 
1911. A CONTRIBUTION TO THE LIFE HISTORY, PARASITISM AND BIOLOGY 
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(3) Harvey, R. B. 
1923. CAMBIAL TEMPERATURE OF TREES IN WINTER AND THEIR RELATION 
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(4) Hesler, L. R. 
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(5) - 
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(6) Putterill, V. A. 
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( 7 ) Ridgway, R. 
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ington, D. C. 
(8) Rogers, J. M. and Earle, F. S. 
1917. A SIMPLE AND EFFECTIVE METHOD OF PROTECTING CITRUS FRUITS 
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(9) Shear, C. L. 
1910. LIFE HISTORY OF MELANOPS QUERCUUM (SCHW.) REHM FORMA 
vitis sacc. (Abstract) Science 31: 748. 
( 10 ) - 
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(11) - and Beckwith, A. M. 
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(12) Stevens, N. E. 
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(13) - and Jenkins, A. F. 
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