Vegetable and Field Crops 



211 



farmers for many years. It is most conspicuous upon the pods 

 as circular, somewhat sunken spots, 3-6 mm. in diameter, 

 which are dark bordered, pale in the centers, or, when ma- 



FiG. 114. — Pea leaves showing the spot disease. After van Hook. 



ture, somewhat pink. In these spots numerous pycnidia are 

 visible and under favorable conditions the spore masses 

 issuing from them may be seen with the naked eye. Upon 



