8 BULLETIN 1252, U. S. DEPARTMENT OF AGRICULTURE, 
sulphur-lime-glue mixture (8 pounds of superfine sulphur, 8 pounds 
of hydrated lime, and 3 ounces of glue mixed to a paste and diluted 
to 50 gallons). Applications were made on April 28, May 18, June 
15, and September 12, the first application being just before the 
blossoms opened, the second when the blossoms were off, the third 
when the husks were shed, and the fourth about two weeks before 
harvest. The season was dry, and there was practically no blossom 
infection in the orchard in which the experiments were made; it 
was quite prevalent, however, in the neighboring orchards that 
remained unsprayed. | 
The weather was showery for several days at the beginning of 
prune harvest, and brown-rot began to develop on the unsprayed 
plat. Dry weather followed, and the spread of the disease was 
checked. In some of the neighboring unsprayed orchards as much 
as 25 per cent and in one case as much as 50 per cent of the crop 
was affected with 
PERCENTAGE fas sie brown-rot. 
97 reaeess CCAD TREATHENT payp pas ATER MIEVESTING Two pickings were 
zest... ——,, 2 > 2s made on the experi- 
BORDEN, HUXTURE PLUS mental plats—the 
CEN FISHOIL. SIP first on September 
SELF BOILED LIMESUP¥e 
PLUS LOSIN-FISHUL. S24 22 to 26 and the sec- 
AS ABE BUT LAST ond on October 2 to 5. 
PALILATION GMUT TED 
The percentages 
5 ee ae shown in Figure 3 
SULPHUR, DUST are based on the total 
SULPHURLIME-CLUE from the two pick- 
in G e ings. Cratesofsound 
UNTREATED 
prunes from the vari- 
ous plats were shipped 
Fic. 3.—The effect of spraying os the developers to Wenatchee, Wash., 
brown-rot on Italian Prunes in the orchard and after 2 4 
harvest; experiments at Felida, Wash., in 1917. by ordinary express 
on September 26. 
They were received on September 28 and allowed to stand in a warm 
room till September 30, when notes were taken. 
SPRAYING EXPERIMENTS IN 1918. 
The work was continued in the Felida orchard in 1918 with the 
same spray materials as in the previous year except that a casein 
spreader was used with the lime-sulphur. Applications were made 
April 11, April 29, May 27, and August 20. There was little 
blossom infection in the orchard under treatment. The second ap- 
plication of Bordeaux mixture injured 5 to 10 per cent of the leaves, 
and the last application of lime-sulphur again caused severe injury 
to the foliage. On September 5 it was estimated that 10 per cent 
of the leaves were injured on the lime-sulphur plat, and on Septem- 
ber 24 (after most of the fruit was harvested) fully half of the 
leaves were yellow and many of them had dropped to the ground. 
Six different pickings were made, beginning August 31 and end- 
ing October 15, but most of the crop was harvested on September 
6 and 11. There was no significant contrast in the brown-rot on the 
different pickings, and the results for the season are combined in 
~ 
Oy diate 
