PRUNE AND CHERRY BROWN-ROT IN THE NORTHWEST. 9 
the data included in Table 4. Crates of sound prunes from the 
various plats were shipped to Wenatchee, Wash., by ordinary ex- 
press on September 11. They were received September 12, and 
were held in cellar storage at a temperature of approximately 59° F. 
till September 20, when notes were taken, as shown in Table 4. Little 
brown-rot was present even on the unsprayed fruit. 
TABLE 4.—2Hffect of spraying on the development of Italian Prune brown-rot in 
the orchard and after harvest at Felida, Wash., in 1918. 
Percentage ofrot on 
sprayed and un- 
sprayed prunes. 
Orchard treatment. 
At time |Ninedays 
of after 
| harvest. | harvest. 
Oo 
. Y Men eC 
NOrOUNN Ww 
PaCS TINT KES PRISON ISON SOAP oo 6. foc nn oh on once ncicnnSccccnccguesceccne 
Self-boiled lime-sulphur plus rosin-fishoil soap.................--.------------------- 
Pes spOVe, birt last appucaton omitted s=- =.=. J fs.ssesi de: AE Sie. se oe. 
ARIRAS-SHT DUT cho Ol pL SICAS ela eer = nee yk ce Blt AE eas eR a ge 
InSapove; but last application Onntloed . oe S019 o_O diet li MOL y ee hes 
Rae paniredust:- 2 362! Fe en ee a es 2) 2 Le ea ee eA 
Smmpharlimne-cluemnixture te 955 AOuss yr ditsureite amd? Sen id RO 
RUTPErea LOG. Sa GSLs i ee See a ars tity! 43 EEO LSE Rt ete RED ns be cee en a 
_ 
ee 
SPRAYING EXPERIMENTS IN 1919. 
The work in 1919 was carried out in the Italian Prune and Agen 
(Petite) Prune orchards of L. T. Reynolds, at Salem, Oreg. The 
spray materials were the same as used in 1918 except that the lime- 
sulphur was diluted 14 to 50 instead of 1 to 50, the sulphur-lime- 
glue mixture was omitted, and three dust plats were added, one being 
treated with a sulphur dust containing 85 per cent of sulphur and 
two with Bordeaux dust. Applications were made on April 8, April 
25, May 21, and August 25, accompanying the same phenological 
conditions as in previous years. 
The weather was showery in April, and considerable blossom in- 
fection developed. The Agen orchard had a heavier infection than 
the Italian. On April 16 a count was made of 10,000 blossoms on 
the sprayed Agen trees and of a like number on the unsprayed, and 
it was found that with the sprayed trees 5.1 per cent of the blossoms 
were infected and with the unsprayed ones 11.8 per cent. 
The lime-sulphur plats again showed some foliage injury. It was 
estimated on May 9 that 15 per cent of the leaves were affected and 
on September 17 that 25 per cent showed more or less injury. On 
the latter date about 25 per cent of the foliage on the Bordeaux plat 
also showed injury, doubtless due to a period of rainy weather cov- 
ering six days of the previous week. No injury appeared on the 
Bordeaux plat until after the rain. 
The prunes were harvested September 15, and crates of sound 
prunes from the various plats were saved for a shipping test, as 
= shown in Figures 4 and 5. 
The results again showed the great value of spraying and dusting 
os in improving the shipping and holding quality of the fruit. A study 
-F% 
of Figures 4 and 5 shows that when held after harvest the fruit from 
es 
