1847.] Blight in Fruit Trees. 81 



Fig. 1. — Part of a blighted branch of an apple tree, which was 

 taken from the garden ol E. P. Prentice, Esq., of Albany. 



a, dead bark and 

 w^ood. 



&, livingbarkand 

 newly formedwood. 

 c, constricted por- 

 tion of the stem, and 

 J dead upon the out- 

 ^ side. 



e, interior of the 

 stem,showingsigns 

 of life. 



y, living and luxu- 

 riant growth of part 

 of the branch. 



In this example 

 there is quite a 

 thickened state of 

 the branch at a, 

 which, in the spe- 

 cimen, is strongly 

 contrasted with the 

 part beyond the 

 dead portion; as it 

 is about \ thicker 

 by the formation of 

 new wood since it 

 was attacked by the 

 blight. Most of the 

 new growth has ta- 

 ken place since the 

 time when a branch 

 usually acquires tha 

 length of stem for 

 the season. In the 

 bark, or immedi- 

 ately beneath it, 

 there is often an accumulation of sap in the swollen vessels in a 

 quantity sufficient to flow out in a rapid stream for a moment after 

 it is wounded. This blighted part bears large and healthy fruit, as 

 represented in the cut. 



(Fig. 1.) 



