2 BULLETIN" 52, TJ. S. DEPAKTMENT OF AGKICITLTTJRE. 
this material were examined by Mrs. Flora W. Patterson, Mycologist 
of the Bureau of Plant Industry, who pronounced the fungus to be 
Colletotrichum gloeosporioid.es Penz. 
Hawaiian-grown mangos which were affected by this fungus were 
received by Mrs. Patterson in 1904, and from time to time during the 
past four years Miss Clara Hasse, of the Office of Fruit -Disease Inves- 
tigations, has received mango flower clusters, leaves, and fruits from 
Porto Kico and Florida which were affected by this fungus. 
The disease has been reported by several writers. Fawcett 1 says 
that the trouble was recognized in Florida by officers of the State 
experiment station in 1893. It has been reported from Porto Kico 
by Collins, 2 Hawaii by Higgins, 3 Cuba by Cardin, 4 and Trinidad by 
Rorer. 5 Of the aforementioned writers, Higgins and Cardin state 
that the disease may be controlled by spraying with Bordeaux 
mixture, but their recommendations are not definite and do not 
give the times and number of treatments necessary, or the experi- 
mental data on which the conclusions are based. 
Wester 6 reports that he has had successful results in preventing 
the blighting of the blossoms by spraying. His work was done in 
Florida and will be discussed in another part of this paper. 
It is the purpose of this paper to report in detail such data as have 
been gathered during the past two years in regard to the behavior of 
the disease and its control, together with an analysis and discussion 
of the main limiting factor of the mango in Florida. 
SOURCE OF INFECTION. 
CoUetotricJium gloeosporioides is probably one of the most widely 
distributed pathogenic fungi in the Tropics. In Florida it causes the 
well-known wither-tip of citrus fruits and is pathogenic on at least 
several other fruits. 
Bessey 7 has the following to say hi regard to its distribution hi 
Florida: 
We see, therefore, that it is not a fungus confined to one or two hosts in a limited 
area, with which we have to contend, but one of wide distribution and capable of 
attacking a great many kinds of plants. I have found apparently the same fungus 
on over 50 plants at Miami, some of them common weeds. This explains why, when 
the weather conditions or other circumstances are favorable, the disease springs up 
everywhere without any very apparent center of infection. 
1 Fawcett, H. S. Mango. Bloom blight (Gloeosporium mangi/erae). Florida Agricultural Experiment 
Station Report, 1906, p. 25. 1907. 
2 Collins, G. X. The mango in Porto Rico. U. S. Department of Agriculture, Bureau of Plant Industry, 
Bulletin 28, p. 20, 1903. 
3 Higgins, J. E. The mango in Hawaii. Hawah Agricultural Experiment Station, Bulletin 12, p. 22, 
1906. 
^ Cardin, P. P. Bloom blight of mango in Cuba. The Cuba Review, v. 8, no. 5, p. 28-29, 1910. 
a Rorer, J. B. Annual Report of the Mycologist, Board of Agriculture, Trinidad, p. 7, 1910. 
6 Wester, P. J. Bordeaux mixture for mangos and avocados. The Florida Agriculturist, v. 34, no. 14, 
p. 1-2, 1907. 
7 Bessey, E. A. Report on plant diseases. Proceedings, 21st Annual Meeting,Florida State Horticul- 
tural Society, p. 97, 1908. 
