28 PEACH YELLOWS. 



no prematures, unless a few may have ripened very early and disappeared. The 

 foliage is healthy, and the only indications of disease are copious yellows shoots on 

 the trunk at the earth's surface, just below the excised limb. 



D. Orchard of John A. Nicholson, Leipsic, Delaware. September 21, 1887. An 

 effort was made to cut the disease from 3 trees forming part of a 3-year-old, 39-acre 

 orchard on the farm of John A. Nicholson, near Leipsic, Delaware. There were 19 

 diseased trees and I selected the ones which seemed most favorable, removing 

 large limbs. 



This orchard was not revisited, but I was told that the remainder of each tree 

 showed yellows the following season and that there were 500 new cases. 



All these experiments were begun in mid-September. The next year I repeated the 

 experiments in other orchards, cutting away the limbs in August, i. e., 5 weeks 

 earlier. 



E. Orchard of George Davis, Still Pond, Maryland. Trees set 19 years; cases of 

 1888; selected from about fifty as most suitable for the experiment. The trees were 

 very large and vigorous for their age, trunks, about 1 foot in diameter ; height, 25 to 

 30 feet. I was particular in the selection of trees and cut back very severely, wast- 

 ing much good fruit. The limbs were severed next to the body of the tree -and the 

 stumps were painted. 



(1) August 9, 1888. Variety, not recorded. The tree was full of peaches, nearly 

 all of which were green and healthy. Two small branches had been cut away re- 

 cently because they bore premature fruit. The large limb which had borne these 

 branches still bore a few ripe, red-spotted peaches, but most of its fruit was healthy. 

 This limb was cut away next the trunk, the stump being 6 inches in diameter and 

 sound. Part of the other maiu limb, with much sound fruit, was also cut away be- 

 cause a few twigs on one branch bore premature fruit. One comparatively small 

 limb was left. This bore green peaches and appeared to be perfectly healthy. There 

 were yet no diseased shoots on any part of the tree. 



RESULT. September 20, 1889. Tree gone. Supposed to have been removed acci- 

 dentally in spring or summer on account of disease, the order being to remove all 

 diseased trees. 



(2) August 9, 1888. Variety, Mountain Rose. A small branch which bore prema- 

 ture peaches had been removed recently, and another small branch on the sam* limb 

 bore the ripe and red-spotted fruit. There were no other indications of disease. 

 Even on this limb nine-tenths of the fruit and all of the foliage appeared to be per- 

 fectly normal. The limb was cut away close to the trunk. The sound stump was 7 

 inches in diameter. The limb which remained bore thrifty foliage and was full of 

 green, healthy peaches. A very careful examination of all parts showed no trace of 

 disease. 



RESULT. September 20, 1889. There is no fruit. One branch bears three diseased 

 shoots, but the spring foliage of the tree is still normal in size and color. 



(3) August 9, 1888. - Variety, Reeves's Favorite. Parts of one limb showed symp- 

 toms of disease; a small branch had been cut away recently on account of yellows 

 and two other small branches bore large, red-spotted, ripe fruits, which were in very 

 marked contrast to the unripe peaches upon the remainder of this limb and upon 

 other parts of the tree. Eighteen inches above the cut a feeble shoot, one-fourth inch 

 long, was pushing through the rough bark. Eighteen inches farther up the limb 

 was a shoot, 2 to 3 years old, which bore diseased sprouts on its base and also 6 feet 

 above in its top. These sprouts were small, i. e. } recent growths. There were no 

 other diseased sprouts on the tree, and, even on this shoot, most of the buds were 

 dormant and most of the foliage was green and full grown. The limb which bore 

 these premature peaches and diseased sprouts was cut away close to the body of the 

 tree, although almost the whole of it bore only healthy fruit and all of it bore only 

 dark-green and vigorous spring foliage. The stump was six inches in diameter and 

 decaying at the center. One limb remained. This bore green, healthy peaches upon 



