REPORT OF THE SOCIETY 



Oi 



Mosaic was prevalent on clovers (red, crimson, alsike, white, and trefoil), on 

 sweet clovers (white and yellow), on beans (kidney, both dwarf and pole varie- 

 ties, and Windsor or broad beans), on raspberry, on tomato and tobacco, and 

 on sweet pea. In addition the field pea (Pisum sativum) was determined as a 

 new host. Hundreds of tomato fruits showed characteritic mosaic mottling 

 and red blossoms of sweet peas exhibited a marked and rather beautiful mott- 

 ling. As a result of systematic efforts on the part of Dominion and Provincial 

 authorities mosaic of potato was not severe. 



Fig. 8. — Bladderplums caused by Exoasus primi. Only four plums are unin- 

 fected. 



Leaf hopper burn of potato was serious in certain areas and a disease, new 

 lo this continent ("Dartrose" or "Black dot disease'') was discovered by the 

 writer. This is apparently not serious and is caused by Vermicularia varians 

 Ducomet. It was reported and described by Ducomet from France in 1909 and 



