INSECTS, DISEASES, AND REMEDIES 153 



That scientific research tends to confirm 

 the truth of this conclusion is evinced by 

 extracts from a paper read before the mem- 

 bers of the Chrysanthemum Society of 

 America at the convention held in New York 

 City, November n, 1903, by Professor 

 George E. Stone, of the Hatch Experiment 

 Station, Massachusetts. "Most growers," he 

 says, " are familiar with the chrysanthemum 

 rust, although I have no doubt that some of 

 you have had no personal experience with 

 it. The rust occurs as small blisters, usually 

 on the under side of the leaves. These 

 blisters eventually break open, exposing a 

 brownish, powdery mass. This powdery 

 substance constitutes the uredospores, which 

 are the only spores known to be produced by 

 this fungus in this country. The first 

 appearance of the chrysanthemum rust in 

 America, so far as is known, occurred in 

 Massachusetts during the fall of 1896. . . . 

 The first two or three years of the outbreak 

 in this country proved the worst, and at 

 present little is heard of it in the East, 

 especially from our largest and most efficient 

 growers. Its disappearance appears to be 

 due to two causes namely, the discovery 



