472 



Journal of Agricultural Research 



Vol. XXIt, No. 9 



Although brown rot usually caused heavy losses in the neighboring 

 orchards, sometimes destroying more than 75 per cent of the crop, it was 

 never serious even on the control plots in the orchards in which the 

 experiments were made. Notes were taken on the amount of rot at 

 picking time and also on the amount developed in shipment and in 

 storage. The shipping tests were carried out as described for the 

 cherries. The prunes used in the experiments were carefully picked from 

 the tree several days before the drying season began. They were too 

 green for drying, yet riper than the average "green" prune shipments. 



Table VIII. — Effect of spraying Italian prunes, Felida, Wash., IQ16 ' 



Orchard treatment. 



"Bordeaux 



•Self-boiled lirae-sul 



phur 



As above, but last ap 



plication omitted. 

 Commercial lime-sul 



phur 



Sulphur dust ....,., 

 Sulphur dust (lastap 



plication omitted) 

 Untreated 



Percent- 

 age of 



Monilia- 

 rot at 



harvest. 



2.4 

 3-8 



2. 2 

 1.6 



4-7 

 8.0 



Percentage of rot Sept. 19, after 

 shipment. 



Monilia. 



Peni- 

 cillium. 



2.7 



■3 

 1.9 



o 

 .6 



2.7 



Rhizopus. 



0-3 



o 

 1-5 



2.8 



Percentage of rot Sept. 23, after 

 shipment and warm storage. 



Monilia. 



8.0 



3-5 

 19.4 



6-5 

 2.8 



5-4 



Peni- 

 cillium. 



12. I 

 8.2 

 I. I 



o 



8.4 



Rhizopus. 



12.8 



14.4 



2.9 



8.9 

 II. 4 



» The prunes were harvested Sept. 13 and Sept. 33. Fruit from the first picking was shipped in pony 

 refrigerators to Washington, D. C, received in good condition Sept. 19, and held at room temperature 

 till Sept. 23. 



Table IX. — Effect of spraying Italian prunes, Salem, Oreg., igi6 ' 



Orchard treatment. 



Bordeaux 



Self-boiled lime-sulphur. 

 Commercial lime-sulphur 

 Untreated 



Percentage of rot after shipment and 

 warm storage. 



Monilia. 



7- I 



7.6 



1.9 



12. 9 



Penicilium. Rhizopus 



3-8 



1-7 



2.6 



.8 



' The prunes were practically free from rot in the orchard, were harvested Sept. 6. shipped by express 

 without refrigeration to Wenatchee, Wash., and held at room temperature till Sept. 16, when notes were 

 taken. 



