)NGR£SS, 



THE STUDY OF HORTICULTURE. 



BY J. C. BI.AIR, ! 

 Professor of Pomologry and Chief in Horticulture, University of Illinois. 



ISSUED MONTHLY. 25 CENTS A YEAR. 



■Qne cent a copy in quantities of ten or more. Send all orders to 

 C. M. Parker, Taylorville, 111. 



.pies Re^pgi^j^ Series, No. 9. Whole No. 33. 



22 !903 



i£nt Entry 

 \ flJ XXc. No 



Taylorville, Illinois, May, 1903. 



PLANT ENEMIES, 

 not infrequently happens that with the best possi- 

 ble care and attention children get mumps, whooping 

 cough and other contagious diseases which are waiting 

 around to catch little folks. So with plants which the 

 fruit grower thinks he has given the best of care. Rust 

 comes along and covers his blackberries and strawberries; 

 bitter rot or scab ruins his apple crop; blight destroys 

 his pear trees, and bugs of all sorts attack every plant he 

 possesses. 



In the first of this lesson we will talk about a few 

 plant diseases, how to know them by the injury done, 

 when we see a plant affected in a certain manner. In the 

 second part we will become acquainted with a few of the 

 insects which attack certain portions of the plant, and in 

 the next lesson we take up plant medicines with manner 

 and time of giving the doses. 



SOME PLANT DISEASES. 



Have you ever read anything about the diseases of 

 fruit trees and other plants ? If not, I am sure you would 

 be surprised could you see a book large enough to hold a 

 description of them all. When one reads about the many 

 things which may happen to prevent the fruit grower 

 from having a crop of fruit it almost seems strange that 

 he ever has any. Nearly every variety of vine, bush and 

 tree has its diseases and insect enemies and it takes a 



