111] Finger and Toe, and Wart Disease 47 
been free from infection for the last six years. Some 
of our well-known varieties such as Langworthy, 
Golden Wonder, What’s Wanted, Peacemaker, and 
Sutton’s Discovery, are immune from the disease. 
All badly diseased tubers and other parts of the 
plants should be destroyed. Slightly diseased tubers 
may be fed, but they should be boiled beforehand, 
as the spores pass through the animal unharmed, and 
so infect the manure. This should not be put on 
potato land. 
All diseased fields should be isolated to prevent 
infected soil from being carried about by the men, 
horses or implements. If possible potatoes should be 
kept from infected areas for six years. Land should be 
dressed with good gas lime at the rate of 4-5 tons per 
acre if a diseased crop is followed by potatoes. It 
should be noted that this disease is scheduled under 
the Destructive Insects and Pests Acts and all cases 
must be reported to the Board of Agriculture and 
Fisheries. 
CHAPTER IV 
MILDEWS 
The term “mildew” is loosely used, and often 
applied to a very large number of the smaller fungi, 
both parasitic and saprophytic. It is now usual to 
confine the term mildew to two families. The mem- 
bers of the family to which the potato disease belongs 
are known as Downy Mildews. The fungi we are 
