conspectus: prevalence and distribution 



61 



of the West, but I have not heard of its occurrence in the East. 

 It is most injurious early in the season, i.e., on the first cutting. 

 Alfalfa is now, according to Piper^ the third most important 

 forage crop in the United States, only timothy and red clover 

 exceeding it. There is a physiological "white spot" on alfalfa 

 (O'Gara) not to be confused with Sackett's disease. 



Fig. 43. — Citrus canker due to Bacterium citri (Hasse) Jehle: A, on Citrus 

 decumana (grape fruit); B, on Citrus trifoliata. Disease introduced into America 

 recently from Eastern Asia. 



Recently in Florida the citrus canker (see Figs. 41 to 44) 

 has caused orange growers a great scare and strenuous efforts 

 are on foot to suppress it. During the last four years, under 

 pressure from the citrous States, the General Government of the 

 United States has made five appropriations for this purpose 



1 Piper, Chas. V.: Forage plants and their culture, N. Y., The Macniillan Co., 

 1914. 



