) 



VOLUME XLIV 



NUMBER 4 



Botanical 



Gazette 



OCTOBER 1907 



THE CHRYSANTHEMUM RAY BLIGHT' 



F. L. Stevens 



(with fifteen figures) 



The common name chosen for the disease at present under dis- 

 cussion is taken from the most conspicuous symptoms of the malady, 

 a blighting of the corolla of the ray flower, resulting in poorly 

 developed; discolored, one-sided heads {fig. i). 



Fig. I. — Three heads, sho\\*ing disease as it naturally occurs. 



Attention was first called to the disease by a letter from Fayette- 

 ville, N.C., dated November 13, 1906, and accompanied by spccimens- 

 The disease has been known at that place and has recurred for three 

 years, each year with increasing destructivencss. It was first attrib- 



* Contribution from the Laboratory of the North Carrlina AgricuUural Experi- 

 ment Station, Raleigh, N. C. 



241 



