690 



Manurial Value of Sewage Sludge. [dec., 



by Eutypella prunastri, Sacc. ; the primary cause of death, 

 however, seemed to be deep planting, which prevented the root 

 from performing its function of supplying water. This was 

 suggested by the wood of the stem showing indications of having 

 died from the centre towards the circumference. The Euty- 

 pella doubtless afterwards attacked the unhealthy stem and 

 hastened the end. 



Specimens of leaves, of geranium, arum and cineraria 

 received from Dorking were covered with Botrytis cinered, Pers. 

 Better ventilation, more especially early in the day, will check 

 the disease. (See Journal, Vol. X, June, 1903, p. 17, and 

 July, 1904, p. 242.) 



Pears containing grit were also submitted from Dorking. 

 Individual pear trees of various kinds often produce fruit 

 containing grit. No method of correcting the defect is known. 



A large number of specimens of diseased potatoes were 

 submitted for examination, and besides those affected with Wart 

 Disease many were affected with Potato Disease (Leaflet No. 23), 

 Winter Rot (Leaflet No. 193), or Oospora scabies (Leaflet No. 137), 

 while one specimen from Gloucester was attacked by Violet Root 

 Rot (Leaflet No. 171). Others were affected with a scab of 

 uncertain origin, not primarily due to a fungus, but probably 

 to physical injury in the soil, and a specimen from Uxbridge was 

 discoloured and the flesh injured owing to a lack of potash and 

 lime in the soil. The latter trouble appears to be most pre- 

 valent where potatoes or root crops are grown frequently 

 or continuously on the same land ; the tubers may be irregular 

 in form owing to the same cause. Still other specimens of 

 potatoes were scabbed by eelworms, scabbed and hollowed out 

 by millepedes, and in one case gnawed and tunnelled by 

 wire worms. 



The utilisation of the manurial constituents of sewage is a 

 subject which has been frequently discussed, but apart from 

 its limited employment on sewage farms 

 Manorial Value of for the growth of plants there appears 

 Sewage and Sewage to be little probability of the problem 

 Sludge. being successfully solved. The Royal 



Commission on Sewage Disposal have 



