60 



This fact is of great importance when selecting bushes for 

 propagation as described in the next paragraph. To be abso- 

 lutely safe every branch should be examined. 



Measures of Control. Two methods only can be recom- 

 mended at present, namely, care in propagating from sound 

 stock and rogueing of the beds. By strict attention to these 

 precautions at least one large grower has practically eliminated 

 the disease from his plantations. 



1. Propagation from Sound Stock. To secure this the stock 

 should be gone over in June and those plants marked which 

 are absolutely healthy. Plants should not be marked in groups, 

 but an individual examination of each plant should be made. 

 It is best to err on the safe side by marking only bushes which 

 are beyond suspicion. 



2. Rogueing. In June each year the cutting beds should 

 be gone over and every affected bush grubbed up and burned. 

 The same procedure should be adopted in the plantation except 

 that, as the bushes are fruiting, they should be marked and 

 reserved for destruction after the fruit is picked. 



CONCLUSION. 



In addition to the diseases dealt with in the twelve preceding 

 leaflets fruit trees are attacked by a large number of other fungi 

 and also by certain diseases the cause of which is unknown. 

 Some of these latter such as Bitter Pit are very serious but 

 up to the present so little is known as to their cause and 

 nature and the means required to control their attack, that no 

 leaflets have been issued. Others, again, are not considered 

 of sufficient importance in this country to justify the publica- 

 tion of special leaflets. 



The principal diseases of fruit trees not included in this 

 volume are listed below, and such information as is available on 

 any of them will be supplied on application to the Secretary, 

 Ministry of Agriculture and Fisheries, 10, Whitehall Place, 

 London, S.W.I. 



Apple Gooseberry 



Silver Leaf. Leaf Spot. 



Bitter Bot. Bust. 



Bitter Pit. Cluster Cup. 



Glassiness. Peach 



Scorch. Mildew. 



Chlorosis. Pear- 



Cherry Canker. 



Blossom Wilt. Brown Bot. 



Brown Bot (see Plum Brown Leaf Spot. 



Bot). Cluster Cup. 



Leaf Scorch. Plum- 



Currants Bust. 



Leaf Spot. Strawberry 



Bust. Leaf Spot. 



Fig , Mildew. 



Canker 



