10 



BULLETIK" 368, U. S. DEPABTMENT OF AGRICULTURE. 



Table III. — Spraying cherries for the control of brown-rot at Salem, Oreg., during the 



season of 1915. 





Treatment, if any. 



Brown-rot (per cent;. 



Plat. 



Royal Ann. 



Black Republican. 





At 

 picking. 



After 

 storage. 



At 

 picking. 



After 

 storage. 



No. 1 



Bordeaux mixture 



0.17 



11 



0.03 

 .05 

 .07 

 .03 



^ 



No. 2 



Lime-snJphur 



8 



No.3 



Self-boiled lime-sulphur 



.25 



.67 



14. 

 55 



2 



No. 4 



Unsprayed 



18 







There was not enough bro^vn-rot evident on any of the plats at 

 picking time to make the contrasts of any great interest. (PL III.) 

 Alter the severe storage tests the effects of spraying were more evi- 

 dent, the fruit from the seK-boiled lime-sulphur plat having only one- 

 fourth as much brown-rot as that from the unsprayed plat in the case 

 of the Royal Anns and one-ninth as much in the case of the Black 

 Republicans. With the Royal Anns better results were secured with 

 Bordeaux mixture than with the self -boiled lime-sulphur. The 

 sprayed fruit held up much better at the local canneries than the 

 'm.sprayed fruit. 



SUMMARY AND CONCLUSION FOR CHERRIES. 



While the work on cherries has not been carried out as fully as was 

 desired, it seems evident that the Moiiiha blossom bhght was the 

 cause of serious losses in the Willamette Valley in the season of 1915 

 and the brown-rot of the fruit the cause of considerable loss at the 

 canneries and heavy losses in the shipping of fresh fruit. No early 

 sprayings were made, and therefore no results were obtained on the 

 effect of spraying upon the blossom infection. The brown-rot at the 

 canneries and in storage has been greatly reduced by late apphca- 

 tions of Bordeaux mixture and self-boiled hme-sulphur. It seems 

 probable that a treatment for cherries similar to that outlined for 

 prunes would give satisfactory control of both the blossom infection 

 and the later brown-rot attacks on the fruit. 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 



