WINTER MEETING. 309 



it become as prevalent in Kansas and Georgia as yellows now is in 

 north Maryland and Delaware, profitable peach-growing will be entirely 

 out of the question. 



CONCLUSIONS. 



(1) The rosette, as now understood, differs from peach yellows 

 in the following particulars : 



(a) The more tufted character and somewhat different appearance of the 

 diseased growths. 



(b) The much greater tendency of these compactly tufted growths to develop 

 in early spring from winter buds, and to appear all over the tree. 



(c) A less tendency to develop sprouts upon the trunk and main limbs. 

 ( d ) The absence of premature fruit. 



( e ) The general early fall of leaves and fruit on affected trees, the fruit being 

 small, yellowish green, and more or less shriveled and gummy. 

 (/) Gummosis of the roots. 

 {g) The occurrence of the disease in plums. 

 (A) The much more speedy destruction of affected trees. 



(2) The disease is virulently contagious (Experiment 1), and it is 

 probable that something might be done toward checking its increase 

 by the prompt destruction of all affected trees. This should be done 

 in early spring, as soon as the disease appears and before the leaves 

 begin to fall. 



( 3 ) The disease may exist for a short time in part of a tree without 

 being in the rest of it (Experiment 2), but it soon involves the entire 

 tr6e. In other words, it would seem from Experiment 2 that the cause 

 of the disease must enter the tree at some particular point or points, 

 and be carried gradually to all parts through the circulation. A com- 

 parison of the November and June examinations in Experiment 1 also 

 confirms this belief. 



(4) As in peach yellows, the admitted fact that neighboring trees 

 are not alwa;v8 the next to take the disease is no argument against its 

 communicable nature. 



(5) This disease has gained a strong foothold, and is on the in- 

 crease, especially in that part of Georgia known geologically as the 

 Archaean. 



(6) If Georgia peach-growers would save their orchards and 

 maintain the successful cultivation of the peach, the necessity for 

 prompt and concerted action appears to be very great. 



