52 BULLETIN 395, U. S. DEPARTMENT OF AGRICULTURE. 



less severe than usual, all the sprayed plats gave a commercially satisfactory control 

 of these troubles. Plats 1 and 2, however, gave markedly superior results, yielding a 

 quantity and quality of fruit which scarcely would have been credited as possible 

 when the work was begun in the spring. 



On plat 3, as would be expected, the insect injury was somewhat worse than on plats 

 1 and 2, while the scab on plat 4 was materially more apparent than on plats 1 and 2, 

 though not quite so conspicuous as on the control. 



On plat 5 scab and ciu'culio were well controlled. Consequently, rot was not very 

 abundant, though it developed to a rather serious extent during the severe conditions 

 which obtained throughout the latter part of the harvest period, when daily rains 

 occurred. The amount of rot which thus appeared was ample to justify the third 

 application, as in the case of plats 1 and 2. 



Striking though they are, the tabulated figures do not give a full conception of the 

 real contrast between the sprayed and unsprayed fruit. The former was firm, uniform, 

 and highly colored, passing excellently through the severe conditions of the picking 

 season and carrying to market in good condition. The latter was much inferior in 

 color, uniformity, and texture, ripening rapidly and unevenly, and becoming too 

 soft for shipment unless picked green. The close picking of the control trees lessened 

 the percentage of rot and culls, as the brown-rot fungus attacks the peach most severely 

 after the fruit has entered well into the ripening stages. 



These results show (1) that the sulphur paste and self -boiled hme- 

 sulphur, respectively, controlled scab and brown-rot in a highly 

 satisfactory manner, the fruit of plats treated with the two fungicides 

 being of remarkably similar quahty, agreeing almost to a per cent in 

 each classification (plats 1 and 2) ; (2) that in northern Georgia at 

 least two, and preferably three, appHcations are necessary for the 

 satisfactory commercial sprajdng of the Carman and similar early 

 varieties ; (3) that the timing of the apphcation on plats 1 and 2 was 

 satisfactory; and (4) that the second apphcation was primarily 

 responsible for scab control. 



Plats 9-15: Elberta. 



The sununarized results from the more important Elberta plats 

 appear in Table X. Certain data which can not be included in the 

 table are as follows: 



Supplementary notes. — The fruit of plats 9A and 9B was so similar to that of plat 9 

 and the results on plat 11 were so similar to those on plat 12 that no counts were made 

 from plats 9A, 9B, and 11. 



As in the case of the Carman results, the tabulated figures fail to give an adequate 

 conception of the superiority of the sprayed over the unsprayed fruit. At first 

 glance, it would seem, for instance, that a very considerable amount of scab infection 

 had taken place on the sprayed fruit. Such, however, was not the case, the great 

 majority of sprayed fruits classified "slightly scabbed" bearing only one to several 

 small, inconspicuous infections which could be detected only by critical expert 

 examination. Thus, a single scab spot of this type frequently served to classify an 

 otherwise perfect fruit as "slightly scabbed." On the other hand, in the case of the 

 imsprayed fruit, the "slightly scabbed" specimens usually bordered very closely 

 upon the "commercially scabbed" class. Therefore, it is important to note clearly 

 that the scab infection on the fruit of all plats which received the second application 

 was commercially negligible. 



