This organism, however, must be considered as being purely 

 an accompaniment of apple rot and not a specific cause of the 

 trouble. 



Core Rot, 

 Apples are sometimes found affected with what is termed 

 core rot, an internal rot confined to the core. This disease 

 has been observed in New York by Stewart, who describes 

 the injured tissue as brown, dry and tasteless. ISTo organism 

 has been found associated with this trouble. Occasionally 

 where worm holes occur there is more or less interior rot- 

 ting of the fruit, but in the case of core rot there is no evi- 

 dence of anv communication between the exterior and in- 

 terior of the fruit from the work of insects, etc. Only a few 

 cases of this have been observed about here. 



Cankers. 

 There are a few fungi which cause a more or less common 

 trouble to apple trees, termed cankers. Some of them are 

 caused by organisms which affect apple trees in other ways ; 

 for example, Splioproysis is caused by an apple rot as well as 

 canker. The fire-blight organism produces canker, and in 

 some sections a canker is produced by a bitter rot fungus 

 (Glomorella) . All of these cankers are more common on 

 neglected trees. 



Canker (Sphwropsis Malorum Ph.). 



This fungus (Figs. 2 and 3) is associated with one of our 

 common cankers, and is most frequently found on the smaller 

 branches. It is characterized by dead areas on the bark, 

 causing more or less irregular scars. On rapidly growing 

 trees this canker sometimes causes a restricted growth and 

 bending of the branches. Some phases of the canker resem- 

 ble sun scald, and from our observations it appears to follow 

 such injury. Treatment with lime and sulphur during the 

 dormant period is undoubtedly as effective as any which can 

 be recommended. 



