a Ey ee ee ee ee OP Oe genes ROY a ne Ge OPI Pe eee 
=; ae 7 ix 3 7s 
74 MISSOURI BOTANICAL GARDEN. 
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65. 
EXPLANATION OF PLATES. 
1. Two typical cultures of Botrytis cinerea on bread-crumbs sat- 
urated with potato broth, showing abundant growth of mycelium and 
developing sclerotia. No conidia are present in the cultures, although 
a few were formed later. Cultures are eight days old. 
2. A pure culture of the fungus on bread-potato broth mixture 
kept in the refrigerator at a temperature of 15°C. for five weeks. A 
number of sclerotia are scattered through the culture but conidia 
are lacking. 
3. Tomatoes inoculated with conidia, showing conidiophores arising 
at the point of inoculation. 
4. Botrytis cinerea infecting beans. 
5. Germinating sclerotia, showing the formation of large tufts 
of conidiophores. : 
