CHAPTER VI 



DISEASES NOT YET KNOWN TO ATTACK 

 SWEET PEAS IN AMERICA 



In an article in the Sweet Pea Annual, 

 Massee ^ describes a pea blight and a pea 

 spot, which as far as is known have not 

 yet made their appearance in this country. 



PEA BLIGHT. 



Peronospora trifoliorum DeBy. 



According to Massee, this disease is very 

 destructive to peas, lupines, and most 

 other plants of the pea family. The dis- 

 ease may appear and spread quickly when 

 the plants are only a few inches high, or 

 it may attack older plants. In dry 



^ Massee, G., Fungoid diseases of the sweet pea. 

 Sweet Pea Annual, pp. 20-21, 1906, London. 



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