No. 4.] 



STATE NURSERY INSPECTOR. 



365 



Insects not yet determined. 



Diseases. 



Of course all the insects and diseases found are removed, or 

 where this is impossible, the infested or infected stock is de- 

 stroyed. A few in the above list have been received so recently 

 that their identity has not yet been ascertained. 



The Pine Blister Rust, 

 This very serious disease of the five-leaved pines has been 

 present in this country for several years. It probably reached 

 Massachusetts between 1900 and 1905, presumably on nursery 

 stock, either directly from Europe or through some other State, 

 and established itself in several places. It was not generally 

 recognized in this country at first, and its seriousness was not 



