CHAPTER XV 
STRAWBERRY DISEASES 
STRAWBERRY-GROWING is often handicapped by pests of one 
sort or another. Among these the leaf-spot and powdery- 
mildew, and at times the Botrytis-rot, are important. 
Growers of strawberries do not rely on spraying alone for the 
control of their strawberry enemies, but practice sanitation, 
rotation and cultivation. These measures of eradication are, 
of course, to be supplemented by protecting the plants with 
some good fungicide. 
LeaF-Spor 
Caused by Mycospherella Fragarie (Schweinitz) Lindau 
Perhaps the most common of strawberry diseases is the 
leaf-spot. It is also called spot disease, sun-burn, sun-scald, 
leaf-blight, and, erroneously, strawberry rust. These names 
will recall to the mind of the reader the disease under considera- 
tion. 
This leaf-spot is found in Europe and America. First studies 
were made in France in 1865. About 1880 it began to attract 
more than usual attention in the United States, and for five 
or six years thereafter complaints of its prevalence and destruc- 
tiveness came from many parts of this country. While the 
trouble is now known in practically all parts of the United 
States, the strawberry-growers of the northeastern quarter 
of the country are the heaviest losers on account of this disease. 
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