i 9 i i.] Wart Disease of Potatoes. 669 



19 10, showing an increase of ,£5,229. The average gross 

 receipts (exclusive of receipts from farms in hand) for the 

 three years to March 31st, 1907 (the year in which the 

 management of the agricultural estates was taken over), was 

 £53,991 , so that during the time Lord Carrington has had the 

 management of the estates the gross receipts have increased 

 by £12,207. 



A scheme for the management of the woods at Delamere, 

 County Chester, comprising about 2,000 acres, is being 

 carried out, and during the past year an area of about 52 

 acres has been replanted. 



A large number of cases of Wart Disease or Black Scab in 

 potatoes have been reported to the Board during the present 

 season. In nearly every instance, how- 

 Wart Disease ever, the outbreaks have occurred in 

 of Potatoes. districts in which the disease has been 



present for years, and in the great 

 majority of cases on allotments and small gardens. Several 

 places in which disease was recorded in previous years have 

 been ascertained to be free from disease this year. These are 

 of two kinds : first, those outside the infected area, where the 

 evidence shows that the original outbreak was due to infected 

 seed, and not to infected soil; secondly, those, chiefly within 

 the infected area, where the growers have planted one of 

 the varieties recommended by the Board as resistant under 

 ordinary circumstances. It is satisfactory to be able to report 

 that there are a large number in the latter category. 



The hot weather of the past summer does not appear to 

 have had much effect in checking the development of the 

 lungus. Badly infected localities, where no precautions have 

 been taken, have yielded potatoes as badly infected as ever, 

 and very few growers who had disease in 19 10 escaped in 



191 1, except where disease-resisting varieties have been 

 grown. 



The disease, however, has often appeared in a different 

 form. The warty outgrowths which are characteristic of the 

 attack have appeared on the stem and leaves, as well as on the 

 tubers, and cases have been reported where the whole of the 

 disease has appeared on the parts of the plant above the 

 ground, while the tubers remained free. 



