72 
IOWA ACADEMY OF SCIENCE 
COMPARATIVE DISTRIBUTION FOR THE UNITED STATES OF COMMON 
1900 
1901 
1902 
7 Black-rot of grape 
-fEastward N. Y. to 
Gulf states 
—Iowa 
-fMd. to North Car. 
—Country at large 
-fR. I. to W. V. and 
Ohio 
8 Bitter-rot apple 
— Va., Maryland 
-fW. V., 0., 111., Mo. 
—Iowa 
9 Apple scab 
-fEastward 
—Iowa 
-fCentral and eastern 
states 
-f California 
—Iowa 
-f Maine to Iowa 
10 Early blight of 
potato 
-fMd., Ark. 
-flowa 
11 Shot hole fungus of 
cherry 
—Country at large 
-flowa 
12 Spot disease of cur- 
rant and goose- 
berry 
-flowa and Neb. 
13 Spot disease of beet 
-f Texas, N. Mexico, 
Iowa 
