Apr. 26, 1924 
Leather Rot of Strawberries 
359 
with a hand lens. Old cultures sometimes showed a faint cream color but never 
turned brown and there was never any darkening of the medium. Cultures 
contaminated with bacteria were easily purified by inoculating them into apples 
and after six or eight days making a reisolation from the advancing edge of the 
lesion. 
MICROSCOPICAL APPEARANCE 
Mycelium .—The mycelium is coenocytic except when old. Hyphae measure 
4 to 7 ju in diameter, the average being about 6 n . Young hyphae are usually 
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LEA/GTH 1 Or COA//O/A //V Af/CrOA/Si 
Fig. 1 .—Graph showing the variation in length of conidia 
full of protoplasm containing many oil drops, while old hyphae are almost always 
practically empty. 
Asexual stage .—In culture, conidia (PI. 2, A, B) were produced freely at 10 to 
20° C. but only in small numbers if at all, at higher temperatures. In the field 
they were found in abundance on fruits collected at Amite and Tickfaw, Louisi¬ 
ana, and at Beebe, Arkansas. Measurements of length and width of 400 conidia 
are given in Table I and are shown graphically in figures 1 and 2. The ratio 
of length to width of these conidia are given in Table II, and shown graphically 
in figure 3. 
