-3— 



teaches us that the wise horticulturist should apply vari- 

 ous solutions to his plants at definite times each year. 

 This is because the development of insects and fungi is 

 governed as is also plant life by climatic conditions and 

 other circumstances of a definite or a periodical nature. 

 After a few years of careful observation it is an easy 

 matter to make the applications at just the right time. 



A list of the spray solutions which have been tried 

 by different experimenters would not prove very interest- 

 ing or even instructive material for this lesson even if the 

 mere list could be crowded into this little leaflet, but 

 fortunately long experience has proven that for the 

 troubles which beset our western plants, there are a few 

 tried and trusty remedies and these alone can be consid- 

 ered at this time. However, if you secure the book above 

 referred to, I hope you will not fail to read the chapter 

 on the ''Early History of Liquid Applications". You 

 will find it very interesting to trace the work of those 

 people who spent many years in testing the value of 

 different chemicals for spraying. If each fruit grower 

 had to be his own experimenter, it would not seem 

 strange to see neglected fruit plantations eaten up by 

 disease and bugs, but the business of experimenting has 

 become the work of the experiment stations of our states 

 and every year many pages are printed giving accurate 

 suggestions for the treatment of plants affected with 

 different diseases. These bulletins or circulars are not 

 sent out haphazard but go to each person who is suffi- 

 ciently interested in them to see that his name is put on 

 the mailing list of his own state experiment station. 



CHECKING SOME PLANT DISEASES. 



Suppose we go out now into the garden and see if 

 we can find a bush or vine affected with that disease of 



