94 Diseases of Economic Plants 



Usually under the influence of this disease feeble shoots also 

 appear in considerable numbers on the trunk and main 

 limbs. These arise from old resting buds, which are buried 

 deep in the bark and wood, and remain dormant in healthy 

 trees. Such shoots are sometimes unbranched, and nearly 

 colorless, but the majority are green and repeatedly branched, 

 making a sort of broomlike, erect, pale green, slender growth, 

 filling the interior of the tree." 



A tree exliibiting these symptoms should be cut and 

 burned. It is valueless, and its presence is a serious menace 

 to the owner as well as to the country at large. 



Rosette.^'^^"^^'' — The peach rosette is southern in distribu- 

 tion, being known chiefly in Georgia (where it was first 

 noted in 1879), South Carolina, and Kansas. As to its na- 

 ture, means of spread and prevention, precisely what has 

 been said of yellows applies. Its distinguishing characters 

 are given by Smith as follows : — 



"Rosette clearly belongs to the same type of diseases as 

 yellows, but its first stages are more striking and its prog- 

 ress is much more rapid. It may first attack part of the 

 tree and then the remainder, the same as the yellows, but 

 it is more likely to appear at once on the whole tree, and 

 generally in early spring. In trees attacked in this manner, 

 all of the leaf buds grow into compact tufts or rosettes. 

 These rosettes, though seldom more than two or three inches 

 long, usually contain several hundred small leaves. A tree 

 thus attacked always dies during the following winter or 

 autumn. When part of a tree is thus attacked, that part 

 dies as above described, and the remainder shows symptoms 

 the next spring, to die in turn after about six months. 



"The prevailing color of the foliage is yellowish green or 

 olivaceous. The older leaves at the base of the tufts are 

 largest, and frequently grow to a length of several inches, 

 but have inrolled margins and a peculiar stiff appearance, 

 due to the fact that they are straighter than healthy leaves. 

 These outer leaves turn yellow in early summer and drop 

 as readily as though it were autumn, while the inner leaves 



