Citrus Canker 
ITS ORIGIN, DISTRIBUTION AND SPREAD 
E. W. Berger, Gainesville, Fla. 
Mr. President, Ladies and Gentlemen : 
When and how citrus canker was first 
discovered in Florida by the Inspector of 
Nursery Stock, and Deputy Inspector E. 
V. Blackman of Miami, its distribution 
in the Gulf States, its introduction from 
Japan, and original distribution in Flo¬ 
rida, was told by the writer at the meet¬ 
ing of this Society at Palatka last year 
(See Proceedings, Florida State Horti¬ 
cultural Society, 1914, p. 120.) 
A rather concise but detailed account 
by the writer, on the History of Citrus 
Canker, together with papers by Prof. H. 
E. Stevens and Mr. Frank Stirling, were 
also read at the last Citrus Seminar at 
Gainesville, Sept. 23, 1914, and printed 
in Bulletin 124, Florida Experiment Sta¬ 
tion, October, 1914. A still more com¬ 
plete account on its history in Florida was 
later published by the writer in The Flo¬ 
rida Grower of November 14, 1914. Bul¬ 
letin 122, Florida Expt. Station, by H. E. 
Stevens, April, 1914, is probably the first 
document on this disease ever printed. 
In May, 1914, Dr. F. A. Wolf and A. B. 
Massey, A. & M. College, Auburn, Ala., 
published Circular No. 27, independently 
corroborating the results given in Bul¬ 
letin 122. In October, 1914, appeared 
Bulletin 150, .Louisiana Expt. Station, 
by C. W. Edgerton. For the purpose of 
this paper, therefore, only the briefest 
kind of summary on its origin and intro¬ 
duction into Florida will be offered. 
* 
ORIGIN AND INTRODUCTION. 
Citrus Canker is present in Japan and 
specimens have been received from there 
at the Florida Expt. Station. The speci¬ 
mens had been labeled “S ! cab” by the 
Japanese. 
During a visit to the Gulf States in 
1914, (March 14-April 5), the writer 
found the disease in Alabama, Mississippi, 
Louisiana and Texas. Information elic¬ 
ited there from nurserymen and others 
was always to the effect that the disease 
had first been observed on C. T. stock 
recently obtained from Japan. The in¬ 
fection started at Monticello also had its 
origin in C. T. seedlings from Japan, 
planted in the Spring of 1910. As per 
statement of the owners the infection at 
Silver Palm was brought from Port Ar¬ 
thur, Texas, in January, 1912, on sour 
seedlings. 
As to the distribution of Citrus Canker 
in Japan or whether it exists in other 
foreign countries ndthing is known. 
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