DISEASES NOT YET KNOWN 151 



PEA SPOT 



Ascochyta pisi Lib. 



According to Massee, this disease attacks 

 sweet peas, French beans and several other 

 leguminous crops. The first indications of 

 disease is the appearance on the pods of 

 pale green spots of variable size and irreg- 

 ular shape. These blotches continue to in- 

 crease in size for some time and eventually 

 become whitish, bordered with a dark line, 

 and the surface is studded with minute 

 black points which are the pycnidia or spore 

 sacks of the fungus. 



It should be remembered that both Asco- 

 chyta pisi and Peronospora trifoliorum are 

 fungi very prevalent on other hosts in this 

 country. It is only a matter of time until 

 these parasites will be found to attack 

 sweet peas. Growers, therefore, should be 

 on their guard against these two troubles. 



