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A List or PLAntT DISEASES OF ECONOMIC IMPORTANCE 
IN INDIANA WITH BIBLIOGRAPHY. 
IN edi, LRTeAiEe 
INTRODUCTION. 
Plant diseases cost Indiana considerably more every year than the 
maintenance of all public schools in the State. In other words, they exact 
an annual tax of over $15,000,000. The loss on the grain crops alone amounts 
to about $11,000,000. The above estimates are based upon the results of 
the experimental and demonstrational work conducted for a number of 
yeers with grain smuts over a large section of the state, upon special reports 
from codperators in plant disease survey, general correspondence, and per- 
sonal investigations and observations by the members of the Botanical and 
other departments of the Agricultural Experiment Station. 
A considerable proportion of this damage to growing crops can be readily 
and cheaply prevented by employing certain well-established, precautionary 
measures. This has been clearly demonstrated in the disinfection of seed 
grain by the formaldehydge treatment and in the spraying of fruit trees. 
Other effective sanitary measures and methods of control are available, 
which, if put into practice, will save yearly a neat sum of money. 
It is highly desirable, therefore, that Indiana farmers realize these facts 
and avail themselves of the knowledge regarding plant diseases and their 
control. A greater interest of the farmer in this phase of work will also add 
stimulus to further and more extensive investigations of plant diseases so 
that new and more practical measures of prevention and control ean be 
evolved and made available for general practice. 
In order to bring together the accumulated information regarding the 
plant diseases that occur within the State the writer has made an attempt 
in this paper to present a list and a bibliography of plant diseases in Indiana. 
It is far from complete, however, and when a thorough survey is completed 
many additions will be made to it. This list is merely intended to serve as 
a foundation for plant disease surveys to be made in the future. 
With a few exceptions the list includes all plant diseases that have been 
reported heretofore in various publications, and other diseases of which 
