Prince Albert, Lord Grosvenor, Prince Bismarck, Chelmsford 

 Wonder, Newton Wonder, Domino, Beauty of Bath, Warner's 

 King, Keswick Codlin, Bramley's Seedling, Duchess' 

 Favourite, Rival, Fearn's Pippin, Dartmouth Crab, Ribstone 

 Pippin, and Han well Souring. 



[n the highly-susceptible varieties, the Blossom- Wilt stage 

 is very conspicuous, and it is not uncommon to find 50-75 per 

 cent, of the flower spurs killed by the disease in a single season. 

 In Lord Derby the wood is very extensively attacked and 

 stretches of wood 1-2 feet in length may be found completely 

 killed, the mycelium spreading from the spur-canker along the 

 shoot and forming hundreds of spore-pustules (see Fig. 3). 



Of varieties resistant to Blossom-Wilt, Bramley's Seedling 

 is the only one which shows this character to a very marked 

 degree. 



Measures of Control. 1. Spraying. So far little success 

 has been obtained on a field scale by spraying. Owing to the 

 delicate nature of the floral organs, a strong spray cannot be 

 applied to protect the stigmas from the spores which produce 

 Blossom- Wilt, and owing to the difficulty of wetting them, 

 it is almost impossible to kill the pustules on the wood. 



The most promising results have been obtained by a winter 

 wash containing caustic soda and soft soap, which if properly 

 applied will sterilize the pustules for two or three weeks. 

 The wash should contain 1 per cent, caustic soda and 

 1 per cent, soft soap, that is, 1 Ib. caustic soda and 1 Ib. soft 

 soap in 10 gallons of water. A slightly stronger solution would 

 be preferable, but, unless the mixture can be kept warm, it 

 becomes glairy or curded. The wash should be applied im- 

 mediately previous to the swelling of the buds. 



-2. Cutting Out. The most successful line of treatment at 

 present is the cutting out and burning of all infected spurs 

 and cankers. 



The periods at which this can be done should be carefully 

 noted. Wherever possible, cutting out should be carried out 

 during the summer when the brown withered leaves of infected 

 spurs contrast with the living ones and constitute a sure guide 

 to places where the knife is required. If, through lack of 

 labour, pruning is left over until winter, the affected parts are 

 not so readily seen and the cutting away is therefore more 

 difficult. Cutting out can take place any time in winter, but 

 it is essential that it should be finished before the buds open. 

 During the winter, however, even with the greatest care, a 

 few diseased spurs are liable to be overlooked. Trees should 

 therefore be gone over a second time. 



Another point to note when removing the dead spurs and 

 cankers is that it is necessary to cut back to the sound living 

 wood. It is not sufficient to break off the withered trusses 

 since some of the mycelium is invariably left behind and this 

 continues to develop and to produce pustules. 



