EXCISIONS AND RESULTS. 29 



all of its branches. Its foliage was also full grown, dark green, and very healthy in 

 appearance. There was not the least indication of disease. 



RESULT. September 20, 18?9. There is no fruit. This tree now bears an abund- 

 ance of healthy foliage and there are no diseased sprouts or other indications of yel- 

 lows none whatever. 



This tree was reexamined October 20, 1890, and found to be diseased in all parts.* 

 The wind had blown away the top 9 feet above the ground, but three small branches 

 remained. These bore many diseased sprouts. The trunk also bore similar sprouts. 



F. Orchard of George Davis, Still Pond, Maryland. Trees set 5 years; cases of 

 1888; selected out of about thirty as most suitable for the experiment. The whole 

 orchard was thrifty and fair to look upon. 



(1) August 9, 1888. Variety, Smock. Two limbs were removed; one was left. 

 Those which were cut away bore premature peaches. The one which was left bore 

 green fruit, and seemed to be healthy. 



RESULT. September 20, 1889. Still diseased. 



(2) August 9, 1888. Variety, not recorded. This tree ramified near the ground 

 into three main limbs. Two small branches on one of these limbs bore premature 

 peaches. The remainder of that limb, i.e. most of it, and the rest of tho tree, bore 

 green, healthy fruit. There were no diseased sprouts, and no other indications of 

 yellows, the foliage of the whole tree being green, full-grown, and healthy. 



RESULT. September 20, 1889. The tree is now diseased in all parts. 



<}. Orchard of F. II. Harper, Still Pond, Mart/land. Trees set 7 years; all cases of 

 1888; selected out of several hundred as being freest from symptoms of yellows, and 

 therefore most suitable for the experiment. As in Mr. Greene's orchard, and else- 

 where many otherwise promising trees were rejected because of slight symptoms on 

 the base of some of the main limbs. All of these trees were free-growing and thrifty. 

 None of the spring foliage was rolled, curled, or yellowish, except upon one tree. 

 The fine green color and robust growth of this foliage, even on affected limbs, was 

 very noticable. The trees were freer from symptoms of disease than at Mr. Greene's, 

 but a larger portion of each was cut away. In fact, the excisions were very severe 

 and wasted a great many baskets of good fruit. Roughly stated, I removed from 

 one-third to two-thirds of the whole top of each tree, only a small portion of which 

 in most cases showed any indications of disease. The limbs wire cut close to the 

 body of the tree, and their stumps were carefully coated with paint. These were 3 

 to 4 inches in diameter. 



This orchard was believed to be well adapted to the experiment because of the 

 healthful appearance of the trees, and because of the very gradual manner in which 

 many of them had succumbed to the disease in 1887 and 1888. The cases of 1887 were 

 dug out and removed that fall or the following spring; the cases of 1888, exclusive 

 of the trees under consideration, were cut back to the stem that autumn, but were 

 not removed until the end of the next growing season. 



(1) August 10, 1888. Variety, Christiana. One limb was removed; two limbs 

 were left. The excised limb bore premature fruit on a small portion only, i. e. two 

 small braoches. The remainder of its fruit was green and healthy. The limb was 

 sound and there were no diseased sprouts. The fruit upon the remaining limbs was 

 green and healthy and the foliage was excellent. 



RESULT. May 13, 1889. Apparently healthy. 



September 17, 1889. Still diseased ; slight symptoms upon two limbs. No fruit 

 this year. 



October 11, 1890. Tree decidedly inferior looking. Foliage, red, yellow, dwarfed, 

 and rolled. In marked contrast to neighboring healthy trees. Tree, very twiggy ; 

 many of the small, unbranched, sickly shoots which grew early in the season have 

 dried up. A few winter buds are now pushing, and the terminal buds on a num- 

 ber of shoots germinated about 6 weeks ago, No fruit this year. 



* See note to G 3. 



