6 H. E. Thomas and W. D. Mills 



up to 8 per cent fruit infection on the Mcintosh variety in Greene County 

 at harvest time. W. E. Blauvelt 3 records 10 and 15 per cent fruit infec- 

 tion in several Mcintosh orchards in Orange County. It is shown later, 

 in this paper, that much of the infected fruit of this variety drops before 

 harvest time. The remainder of the records presented here were taken 

 during the season of 1928. Most of our observations of both cedar and 

 apples were made in Columbia, Dutchess, Greene, Orange, and Ulster 

 Counties. 



In table 1 are given some counts of quince rust on apple fruits col- 

 lected in fourteen orchards in four counties. It will be noted that most 



TABLE 1. Quince Rust on Apple Fruit 



Variety 



Number 



of 

 counts* 



Per cent 



of infected 



fruit 



Notes 



Fameuse 



Hubbardston 



Mcintosh 



Winesap 



Yellow Transparent 

 Delicious 



1 



1 



15 



2 

 1 

 3 



21 



28 



18 



74 



84 

 60 



1 to 59 per cent, pyc- 



nia only 

 72 and 76 per cent 

 Pycnia only 

 Pycnia only 



♦Counts for the most part represent 50 or 100 fruits. 



of the varieties included in the table are usually listed as resistant or 

 immune to the apple rust. From the data it is evident that direct fruit 

 infection alone is blamable for heavy losses. 



In table 2 are shown some records of fruit infection by the apple-rust 

 fungus. Even here the injury to the crop through direct infection of 



TABLE 2. Apple Rust on Apple Fruit 



Variety 



Per cent 



of infected 



fruit 



Jonathan 



Rome Beauty 



Esopus Spitzenberg 

 Sutton Beauty. . . . 

 Twenty Ounce. . . . 



Wealthy 



Winter Banana. . . . 



25 

 30 

 95 



27 

 18 

 25 

 12 



3 Typewritten report of special field assistant, 

 Entomology, Cornell University. 



Departments of Plant Patholojry and 



