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PRUNE AND CHERRY BROWN-ROT IN THE NORTHWEST. 15 
the unsprayed plat. The dwarfing effect was so serious on the Black 
Republican fruit that the cherries from the Bordeaux mixture and 
the self-boiled lime-sulphur plats were discounted in price at the 
cannery, and some of the trees sprayed with Bordeaux mixture were 
not picked. 
The weather was dry during the picking season, and there was prac- 
tically no brown-rot in the orchard. Holding and shipping tests were 
made, as in the previous years. | 
The Napoleon cherries were picked July 7, shipped in pony re- 
frigerators the same day, received in Wenatchee, Wash., July 12, and 
held in a warm room till July 14, when notes were taken. 
The Black Republican cherries were picked July 15, packed in pony 
refrigerators the same day, and shipped to Wenatchee, Wash., where 
they were received July 18, held under ice till July 19, and then at 
room temperature till July 24, when notes were taken. 
The Lambert cherries were picked July 21, shipped in pony re- 
frigerators the same day, and received in Washington, D. C., on 
July 30, when notes were taken. The results are shown in Table 5. 
TABLE 5.—Development of brown-rot on sprayed cherries and unsprayed 
cherries, in 1917. 
Percentage of brown-rot after 
holding. 
Orchard treatment. 
Black 
Na- Lam- 
poleon Hepat: bert 
Bordeaux, plusrosm-fshoilisoapr. = 3.022525. 2222 4925-22-22. SORES =O 0.2 0.1 
Self-boiled lime-sulphur plus rosin-fishoil soap -.--.--.---.---------------- a! 0 0 
Asahove, but last application’ omitted......-.f.2 22 ke cee 33 1S Se ae ee 
Age SHEP AUle— OPUS CASCIBEES csc 4. =n nas lco emer eee cones noes ee 0 aul: -6 
EVEL CAL EOS so oad re ee eee ac poeta tee COREE VE Pada Se sacd -3 2.7 5.0 
SPRAYING EXPERIMENTS IN 1918. 
The experiments in 1918 were confined to the Napoleon variety. 
The spray materials were the same as in previous years except that 
a neutral Bordeaux mixture (2 pounds of copper sulphate neutral- 
ized with limewater and diluted to 50 gallons) was substituted 
for the standard mixture and the self-boiled lime-sulphur plat was 
omitted in an effort to eliminate the dwarfing effects of strongly 
alkaline sprays on the fruit. Applications were made on April 15, 
May 2, May 15, and June 18. 
Blossom infection was evident early in May, and counts were 
made at various times to determine the percentage of infection on 
the different plats. The results are shown in Table 6. 
TABLE 6.—Brown-rot blossom. infection of Napoleon cherries in 1918. 
Percentage of blossoms in- 
fected on— 
Orchard treatment. 
May 9. | May 13. | May 17. 
Palo nmxatnasetitee. «ato asain - koarygsek te Ek. cb oebers Peeps - bees 20.3 8.0 6.8 
Ue STEAGifs TELE RAPS 2 ey RB el a es ene Gt ele ee 13.4 10.0 5.9 
(OUST) ee ee SS es ae ee ee er ee es eee Ta ee ete 33. 7 32.5 26.5 
