198 STATE HORTICULTURAL SOCIETY. 



was so unsatisfactory that it was entered as "very doubtful." Three of 

 these trees received two buds each, but by accident the other received 

 only one bud . 



In one of the 115 diseased trees the evidence of . union between the 

 stock and the two inserted buds was also doubtful. In all of the others 

 some part of one or both buds had united with the stock, and in many 

 instances was still living. This was also true of the six trees removed in 



1890. Often, however, only small fragments of each bud healed on. 

 Occasionally less than one fourth of one square centimeter of the bark of 

 one bud was all of the diseased tissue that had actually united with the 

 stock, and yet this was sufficient to induce the disease. None of the 

 inserted buds pushed over three inches, most failed entirely or pushed 

 one fourth inch to one inch and then died. 



The diseased seedlings were noticeably smaller than the four healthy ones. 

 On an average they were about three feet high with a proportionate spread 

 of branches. 



The contrast between the November and June examinations is note- 

 worthy. In November, when the disease had been acting less than five 

 months, only sixty-six of the stocks showed any symptoms whatever. 

 None of them were wholly diseased; most showed no signs of disease at a 

 distance, and even a large part of the six worst cases was still free from 

 symptoms. In June, after the disease had been acting nearly a year, 121 

 of the original 125 trees had become affected, and 115 so completely that it 

 was almost impossible to find any healthy branches. The only uncer- 

 tainty is concerning the six which were removed in November for photo- 

 graphic purposes. Their condition, however, at that time warrants one in 

 believing that they too would have become wholly diseased long before 

 June. 



This experiment was the more striking, because in the same field, form- 

 ing part of the same nursery, and separated from these five rows only by 

 the width of a one-horse cultivator, are about 4,000 Elberta trees, which 

 were budded on the same stocks and at about the same date with buds cut 

 from healthy trees on the same farm. These trees were carefully exam- 

 ined for the rosette, but in the whole nursery there was not one case, nor 

 even one suspicious tree. The line of separation between these healthy 

 trees and the five inoculated rows was sharp as could be desired, and the 

 contrast was most astonishing. 



Naturally, the results of this experiment attracted considerable atten- 

 tion in Georgia, especially the appearance in the spring and summer of 



1891. The trees were examined by many persons, including Col. R. J. 

 Redding, director of the Georgia Experiment Station; Gustave Speth, 

 Horticulturist of the Georgia Experiment Station; Prof. J. E. Willet of 

 Macon; H. W. Hasselkus of Griffin, and Rudolph Gutter, of Vineyard. 

 A summary of the final results was given before a meeting of the Mid- 

 dle Georgia Horticultural society, June 9, 1891. The matter was also 

 brought to the attention of Mr. Berckmans and other members of the 

 State Horticultural society. 



Experiment 2. — This was also performed at Vineyard, Georgia, on the 

 farm of J. D. Husted. 



The fifty-six trees selected for this series of inoculations were vigorous, 

 well-rooted cuttings of the Mariana plum. They formed part of a small 

 nursery grown in 1889, but not budded that year, being cut to the ground 

 in the spring of 1890, so as to secure fresh shoots for budding the follow- 



