144 EXPERIMENT STATION. [Jan. 



AN OUTBREAK OF RUSTS. 



BY G. E. STONE. 



For the j)iisf tlii-oe years certain rusts have increased mate- 

 rially in this State as well as in other sections of the United 

 States. The rnst on the apple, which has been scarcely notice- 

 able for years, at least on our cultivated fruit trees, has become 

 quite common the last three seasons. It was particularly prev- 

 alent three years ago, and quite a little of it has been noticed 

 on apple leaves the past two years. The hawthorne (Crataegus), 

 a i)lant closely related to the apple, has shown a much greater 

 tendency to rust in the period above mentioned than formerly, 

 and some anxiety has been felt by nurserymen who have had to 

 contend with this in their nurseries. 



The ash rust, which is supposed to have as one of its hosts 

 the grass known as Spartina, has occurred much more com- 

 monly than usual during this period. It is to be found on 

 young growths of ash trees, distorting the twigs. There have 

 also been severe outbreaks of the bean rust lately, although this 

 has given little trouble in former years ; and the hollyhock, rose 

 and quince rusts have been much more common than formerlv. 



