66 THE CONNECTICUT POMOLOGICAL SOCIETY. 



portion of the bark from the bud shield, heals in. This was 

 pointed out by Smith and in a recent series of experiments 

 budding in pieces of the bark without the bud reproduced the 

 yellows. Tests were made in inoculating crushed fragments 

 of the bark, but no results came. In the same way in the 

 little peach disease, portions of the bark, wood, leaves and 

 fruit were crushed and mixed with water and these separate 

 infusions were, when freshly made, injected with a hypodermic 

 needle under the bark of healthy one-year nursery trees. Al- 

 though these experiments were carried on at the same time 

 that the budding tests were made, and the trees have grown 

 for four years, they remain entirely healthy. I have been 

 repeatedly informed by practical orchardists, notably by H. 

 G. Welch, of Douglas, Michigan, that attempts were made to 

 inoculate trees by whipping the leaves and branches of them 

 with twigs affected by yellows, without transmitting the dis- 

 ease. On the other hand some curious orchard experiences 

 have come up, founded on circumstantial evidence. Mr. 

 Jesse Lockwood, at Olcott, N. Y., in cutting out a colony of 

 about half a dozen yellows trees hauled them on a wagon 

 diagonally through the orchard. The infected branches rubbed 

 against the trees and later a strip of yellows developed along 

 this track. I believe this has been observed in a few other 

 cases. It is possible that these cases might have happened 

 when conditions were just ready or ripe for infection, but if 

 this is the case, we do hot know the conditions well enough 

 to duplicate the process at will. 



Blossom Infection. Over 100 years ago Prince of Flush- 

 ing, Long Island, ventured the hypothesis that bees in visiting 

 the blossoms carried the yellows from one tree to another. In 

 the light of recent discoveries in the transmission of pear blight 

 germ by bees, this theory seems to deserve some considera- 

 tion. It is commonly mentioned by orchardists, probably as 

 a result of the knowledge of pear blight. Dr. Smith, however, 

 after careful observations and experiments, reached the con- 

 clusion that yellows was not transmitted in the blossom. What- 

 ever may be found out in the future in this regard, it must be 



