

PEACH YELLOWS AND PEACH ROSETTE. 199 



ing summer. These trees formed the east end of the south row and were 

 not different in appearance from the rest. All were the picture of health. 



The buds for inoculation were taken from the north side of a seedling 

 peach tree which was growing by the wayside near Pomona, Georgia. 

 This tree may have been four years old. The south one half of it was 

 diseased by the rosette, and the remainder appeared to be healthy. Well- 

 matured terminal shoots from the healthy-looking branches were selected 

 for use in budding. All of them bore full-grown leaves of a healthy 

 green, and their buds showed no tendency to germinate. Moreover, all of 

 the foliage on the branches in the immediate vicinity was full-grown and 

 healthy, and there were no signs of disease nearer than the base of the 

 main branches, four to six feet below. The buds were cut July 1, 1890, 

 and inserted the same day — two into each tree — in the usual way. A sub- 

 sequent examination showed that many of them had healed on and were 

 living. The tops of the cuttings were not removed until some weeks 

 later. 



These trees were reexamined November 3, 1890. At that time only 

 'thirty-two of the fifty-six stocks bore peach shoots. Upon the rest the 

 buds failed to take or died soon after commencing to grow. In thirty of 

 the stocks the buds had grown into shoots, which were fifteen to thirty 

 inches long. In many cases both buds grew. The foliage, which had not 

 yet fallen, was normal except for slight parasitism of Puccinia pruni, Pers., 

 and the shoots were vigorous. There were no rosettes, no winter buds were 

 germinating, nor were there any other signs of the disease. One bud only 

 developed in each of the other two. One had grown only about eight 

 inches, but was normal; the other had grown only a half inch and the 

 foliage was reddish and unhealthy. All of the stocks appeared to be as 

 healthy as when the buds were inserted. 



The parent tree was also examined at this time. The disease had made 

 considerable progress, but careful search failed to discover any germinating 

 buds or sickly shoots upon that part of the tree which supplied the buds 

 for inoculation. There were signs of disease at the union of the main limb 

 and the stem, but none further up. All large parts of the tree were still 

 alive. 



This tree was reexamined June 8, 1891. It bore no normal leaves or 

 shoot-axes. The limbs which were first to manifest disease in 1890 were 

 now dead in great part, and all other portions of the tree were badly 

 diseased, including the branches from which the buds were taken. 

 Unfortunately the extreme ends of the branches were dead without symp- 

 toms of rosette or foliage of any sort, but they were living last November 

 and are now alive to within one foot of the cuts, and bear very sickly 

 rosettes. , 



The peach tops inoculated upon the Mariana plums were again examined 

 June 22, 1891, and the contrast between them and the condition of the 

 tree which furnished the buds was very great. They looked as healthy 

 and vigorous as did the north side of the parent tree when the buds 

 were cut. 



Fifteen stocks bore double shoots and sixteen bore single shoots, making 

 a total of forty-six living peach shoots on thirty-one stocks. A very few 

 of the remaining Mariana stocks died; the rest grew thriftily and were cut 

 back to the earth at the time of this examination. None developed any 

 symptoms of rosette. The average growth of the peach shoots to date is 

 three to three and a half feet, and their diameter at the base where they 



