EXPLANATION OF PLATE ONE 



Figs. 1, 2, 3^ 4, 5, - Diagrams of cross sections of 

 the apple showing depth the fungus penetrates the tissue. 



Fig. 6 - Tissue of diseased portion,"' howing mycelium 

 and starch grains. 



Fig. 7 - Tissue of healthy portion showing cells - no 

 starch grains. 



Fig. 8 - Chain of conidia from c onidiophore s; also a 

 chain developing from a spore in the chain. Conidia with lon- 

 gitudinal septations. 



Figs. 9, 9a, 91) - Spores having different lengths of 



beaks . 



Fig. 10 - Spore with small spore developing from end 

 of a long beak.' 



Fig, 11 - Old spore showing round instead of angular 



cells. 



Fig. 12 - Mature spore beginning to germinate. 

 Fig. 13 - Typical spores with long beaks. 



Fig. 14 - Mycelium from cornmeal agar showing the ma- 

 ture part dark and the new light. Conidiophore s dark. 



Fig. 15 - Aerial mycelium, showing comparative size 

 as compared with internal mycelium. Note the enlarged cells or 

 nodules. 



