EXPERIMENT STATION REPORT. 309 



ferecl more or less, but no trace of the disease known as the 

 yelloius has made its appearance. 



The soil upon which these trees are planted is a medium 

 sandy loam, and well adapted to the growth of all kinds of 

 fruits except the currant and quince. 



III. Testing New Varieties of Fruits. 



The soil to be devoted to this purpose is, like the above, 

 well suited to the growth of all of the fruits except the cur- 

 rant and quince. The land has been prepared, and a few 

 varieties of peach and apple trees planted. 



IV. Influence of the Stock upon the Scion. 



This experiment has only been started with some of the 

 large fruits, but it is proposed to begin also with the smaller 

 fruits and plants that require less time for development and 

 maturity. 



V. Diseases of Plants. 



The time given to this subject has been largely in continu- 

 ation of the study of the disease of the peach tree known as 

 the yellows, which has for several years been carried on 

 under the auspices of the college. In order to more fully 

 understand the present condition of the experiment, I will 

 give a brief history of the trees and the special treatment 

 they have received. 



The orchard originally consisted of about fifty trees, 

 planted in 1870. For the first few years they received but 

 little care. In the spring of 1873 all were carefully pruned 

 to as good form as their condition would allow, the borers 

 removed, and the soil manured and planted with squashes. 

 The result was, that after a year or two they bore a good 

 crop of fruit. After fruiting, many of the trees showed 

 signs of disease, and a series of experiments were instituted 

 with six or eight trees in 1878. The remarkable change 

 made in these trees led to the continuance of the remedies 

 upon all the peach trees in the college orchards that showed 

 signs of disease. The results of the application of the 

 remedies, when applied before the disease had made too 

 great headway, have been entirely satisfactory ; so much so 



