474 



Journal of Agricultural Research 



Vol. XXII, No. 9 



Table XII. — Effect of spraying Italian and A gen (Petite or French) prunes, Salem 



Oreg. , igiQ ' 



1 The prunes were harvested Sept. 15, shipped to Wenatchee, Wash., Sept. it, received Sept. 18, and 

 notes taken Sept. 23. 



2 No shipment. 



The contrast in the amount of brown rot (MoniHa) on the fruit from 

 the different plots after shipment and storage is shown graphically in 

 figure I. 



A study of the figure shows that the unsprayed fruit developed six 

 to nine times as much brown rot under transportation and market 



si BO/?£>£/?UX 



SULPf-/U/? OUST SO-3e-/S — 



^i so/?£>£:/9ax otASr b 



/o ;so .so '?c 





Fig. I. — Brown rot on Italian and Agen prunes after shipment and storage. 1919. 



conditions as the fruit from the plots receiving the best orchard treat- 

 ment. The sulphur dust was as efficient as the sprays, but the Bordeaux 

 dust was far less efficient. 



The results show that orchard spraying may have great value on the 

 market even when the amount of disease in the orchard has been negli- 

 gible. 



DISCUSSION OF RESULTS 



In order to obtain the composite results from the various prune and 

 cherry experiments the data from the different spraying and shipping 

 tests have been brought together and averaged. The results are shown 

 in figures 2 to 6, inclusive. 



