LETTER OF TRANSMITTAL. 
U. 8. DrEParTMENT oF AGRICULTURE, 
BurEAU OF Piant INpDUusTRY, 
OFFICE OF THE CHIEF, 
Washington, D. C., December 21, 1905. 
Str: I have the honor to transmit herewith the manuscript for a 
bulletin entitled ‘*‘The Control of Apple Bitter-Rot,” by Mr. W. M. 
Scott. This paper was submitted by Mr. A. F. Woods, Pathologist 
and Physiologist of the Bureau, with a view to publication. 
This Bureau has fora number of years been investigating this serious 
disease, which nearly every year causes great loss to apple growers. 
The loss some years has been estimated to be more than $10,000,000. 
Although many attempts have been made to control the disease by the 
ordinary spraying methods, the results have been unsuccessful. Mr. 
Scott. has discovered the reason for these failures, and the results of 
his investigations during the present season (which has been exceed- 
ingly favorable for the development of bitter-rot) indicate that the 
" disease can be successfully controlled ata nominal cost. Itnow remains, 
through demonstration experiments to be conducted in the various 
apple districts, to bring the method into general use. 
it nes acwsnelly meooriniairel that this paper be epeplisnes as Bulletin 
No. 93 of the series of this Bureau. 
The accompanying illustrations are essential toa clear under aneine 
of the text. 
Respectfully, B. T. GaLLoway, 
Chief of Bureau. 
Hon. JAMES WILson, 
Secretary of Agriculture. 
