PLATE 13 
• , A '7? e ' ation of S ? ed ' Coat in J ur y to attack by Rhizopus on seed germinating on an 
infected blotter: 1, hand-thrashed seed, seed coats uninjured; 2, hand-thrashed seed 
seed coats broken over endosperm; 3, hand-thrashed seed, seed coats broken over 
embryo; 4, harvester-thrashed seed scoured for milling. 
B.-Same as A but 2 days later, showing that the badly infected seeds never produce 
