212 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VoL. IL. 



at right angles to the surface, red streaks are seen which can sometimes 

 be traced from the pit to the surface and corresponding with the " surface 

 marking " above described : a cross section of the fruit shows these 

 Hnes as red dots in the yellow substance of the peach, which is path- 

 ognomonic. The reddish or crimson color around the pit is also in- 

 creased above that of normal healthy fruit. 



Taste. — The taste is sometimes normal, sometimes the fruit is quite 

 insipid, not mfrequently slightly bitter. In some of the samples tasted 

 this year the flavor seemed to strike the back of the palate after a few 

 seconds and had a " tannic character " to it, lasting quite a time after 

 the peach had been tasted. 



Decay. — This occurs more rapidly than in normal fruit. 



As a rule the above are the signs which are first discoverable in a tree 

 which is affected. The following season not only will the peach but 

 also the foliage and smaller branches show signs of the disease. 



Shoots. — The young shoots develop and sometimes fill the whole 

 interior of the tree top. This growth consists of small, unhealthy shoots 

 which are frequently much branched ; the leaves are small, narrow and 

 sharp, and are clustered a good deal and the whole combination gives 

 the tree quite a bunchy appearance at the top. According to some of our 

 Canadian growers, these characteristic branches are seen first on the large 

 primary branches of the tree and are found growing up as thin delicate 

 shoots with the same small leaves, and all with a yellowish tinge about 

 them. It should have been remarked above that the leaves are yellow- 

 ish in color, and hence along with the bunchy appearance is also the 

 yellowish colour of the tree from which the name of the disease is 

 derived. The leaves are very justly compared to those of a willow tree, 

 and average not more than two or three inches long by one-quarter or 

 one-third inch wide. The shoots are much like willow twigs in form, 

 but are not so resilient. 



These small, ill-developed twigs, along with the not too markedly 

 yellowish tinge of the tree, and its bushy appearance, quite diagnose the 

 affection in the tree itself 



Frequently only one limb is affected that year, but next season the 

 disease will be noticed to be general throughout the whole tree. 



The following year the tree has all the above signs in a more marked 

 degree, frequently having no fruit on it, and with death of some of 

 the limbs. The foliage is dwarfed, yellowish or reddish-brown, and 



