72 EXPERIMENT STATION. [Jan. 



particiilarl>' that of tlio oini, was caused l)_v squirrels, and some 

 was due to a natural shedding of the twigs. Dothidella ulmi, 

 a leaf-s})ot fungus occasionally found on elms, was unusually 

 abundant rather early in the season, and this was also re- 

 sponsible for nnieli loss of foliage. 



The Italian poplar was more severely affected with the rust 

 (Mehnvpsora) than usual, and the twigs and leaves of the ash 

 suffered from a similar fungus to au unusual extent. Horse- 

 chestnut foliage was badly affected with a leaf spot (Phi/Uo- 

 sticta), and a black spot {Rhytisma) more or less common 

 every year on the white maple was unusually abundant. It was 

 more common on the white maple than usual, and the leaves 

 of the red maple were literally covered with it. 



Ivy (Aiiipelopsis) was affected with a leaf spot. Tn some 

 localities quite a few maple trees were killed by sun scald, while 

 others were scalded only on their southern exposure. Following 

 this outbreak of sun scald, Nectria, a fungus of saprophytic 

 habit, develo])ed freely. 



