556 



Potatoes Resistant to Wart Disease, [oct., 



very susceptible to spring frosts. It has, however, two foes 

 which have recently made their appearance, and in some 

 cases caused considerable damage and anxiety to growers, 

 the Raspberry Beetle (Byturus tomentosus), and also a blotch, 

 presumably a fungoid disease, which attacks the cane, for 

 neither of which has an entirely satisfactory remedy been 

 forthcoming. In conclusion, it should be said that the 

 Loganberry is a gross feeder, and requires plenty of nourish- 

 ment and attention. 



The most simple remedy for the prevention of Wart Disease 

 is to avoid growing potatoes on infected land. In allot- 

 ments and cottage gardens, however, it 

 Varieties of Potatoes [§ a remed wMGh cannot in practice 

 Resistant to , . , . \ , , , • 



Wart Disease adopted without great hardship to 



growers, and it is therefore a matter of 

 the greatest importance to ascertain whether any varieties of 

 potatoes exist which are sufficiently resistant to the disease 

 to enable them to produce a crop of sound tubers on land 

 containing the spores of the disease. 



With this view the Board arranged for some experiments * 

 to be carried out in 1909 by the staff of the Education Com- 

 mittee of the Lancashire County Council, the Harper Adams 

 Agricultural College, Shropshire, and the Holmes Chapel 

 College of Agriculture, Cheshire. 



These experiments were made at five places, and showed 

 that the following varieties grown on infected land were not 

 attacked by Wart Disease : — Langworthy, What's Wanted, 

 Golden Wonder, Sutton's Abundance, Findlay's Conquest. 

 Snowdrop was, apparently, not always true to type, and while 

 one form was immune another was diseased. A number of 

 other varieties that were planted, especially those of the Up- 

 to-Date type, were all badly diseased. 



This year similar arrangements were made for trials of these 

 varieties, and of a large number of others to be carried out. 

 The experiment was conducted on land infected with Wart 

 Disease, at five centres in all. At the Holmes Chapel 

 College the land was very badly infected, and only two 

 varieties were entirely free from the disease, viz., Sutton's 

 Discovery and Golden Wonder, though Langworthy and 

 What's Wanted were but very slightly attacked. Snowdrop 



* See Journal, December, 1909, p. 762. 



