A Preliminary Report on the Occurrence and Distribution of the Common Bacterial and Fungous Diseases of Crop Plants in Illinois

The next important step in the study of plant diseases is concerned with epidemiology—the fluctuation in severity and abundance from year to year exhibited by all diseases. An explanation of the causes underlying these fluctuations promises things of the greatest importance to the growers of our crops in the improvement of control measures and the regulation of times and methods of their application

Methods and Principles for Interpreting the Phenology of Crop Pests

In the present state of affairs, this paper proposes primarily to call attention to a method of defining the relations of plant diseases to climate and weather; but it intends, also, to make additional suggestions which may be useful to entomologists (the latter having used the method to a limited extent) and to point out some of the fundamental principles concerned. If certain sections of the paper should appear to readers to be lacking in conclusiveness, the writer would respond that his aim has been not so much to draw final conclusions as to illustrate the potentialities of a method

Epidemic Diseases of Fruit Trees in Illinois 1922-1928

It is our purpose, now, to present in some detail an account of the survey methods that have been developed and used in dealing with fruittree diseases and to state the results that have been obtained through their use. These methods are similar in certain respects to those described for cereal diseases in a former publication. Consequently this discussion has been made as brief as possible

The Native and Naturalized Trees of Illinois

In presenting this book to the people of Illinois, it has been the authors\u27 aim to furnish not merely a manual of the trees of the State but to give as complete an account of them as our present knowledge would permit. Consequently, the reader will find in the following pages not only a means for identifying trees but also the important facts concerning their distribution, their history, their uses, their past and present importance in commerce and industry, and many other things

The Drug Plants of Illinois

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Epidemic Diseases of Fruit Trees in Illinois 1922-1928

From 1921 through 1928, a survey was made in Illinois of the epidemic diseases of fruit-trees. During these years, methods of measuring the epidemics had to be devised, tested, and perfected; in every year the epidemics were measured with the means at hand, and the measurements were recorded according to definite plans. The full results of this survey are now reported in the text of this paper.published or submitted for publicationis peer reviewe

2 sooty molds occurring on the mango in Puerto Rico

Thesis (M.A.)--University of Illinois, 1920.Typescript.Includes bibliographical references (leaf [21])

Rout the Weeds!

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