PLATE 70 



Effect of formalin i to 400 treatment for 6 hours, with and without 6-hour presoak: 



1. Fultz wheat: A, control, 76 per cent germination; B, seeds presoaked 6 hours, 

 then formalin i to 400 for 6 hotirs, 79 per cent germination; C, seeds treated with form- 

 alin I to 400 for 6 hours, not presoaked, 57 per cent germination, plants dwarfed. 



2. Poole wheat: A, control, 90 per cent germination; B, seeds presoaked 6 hotirs, 

 then formalin i to 400 for 6 hours, 89 per cent germination; C, seeds treated with form- 

 alin I to 400 for 6 hours not presoaked, 67 per cent germination, plants dwarfed. 



