New York AGRICULTURAL EXPERIMENT STATION. 665 
on pears as follows: “Do not use Bordeaux mixture more than 
once after blooming on early pears, and not more than twice on 
late pears.” 
Galloway” observed injury to pears from use of Bordeaux mix- 
ture in 1892, but discovered that air-slaked lime being used in 
insufficient quantities in preparing the mixture resulted in the 
Injury observed. 
The Potassium Ferrocyanide Test. 
Jones” reports in the Garden and Forest injury to both apples 
and pears in 1894, which he attributed to an application of Bor- 
deaux mixture just after the blossoms fell, the preparation of 
which was governed by the potassium ferrocyanide test. He 
expresses the opinion that this method of preparation should be 
more thoroughly tested before being recommended for general 
use in orchards. Replying to an inquiry on this subject Professor 
Jones writes that at the period of the application referred to 
and about two weeks thereafter there was a considerable rainfall 
and continued cool, cloudy weather. In the letter referred to 
Prof. Jones says: “Our weather was cold and rainy also, as you 
may see from the following summary : 


CONDITIONS AT TIME OF AND FOLLOWING THE 






' APPLICATIONS. 
DATES OF SPRAYING. 
Sky. Rainfall. Temperature. 
First application, before leaf-buds| Generally clear. | Only trace during| Rather warm for 
opened, April 23, Bordeaux mix- next 10 days. time of year. 
ture. May 1 was 
warmest day of 
the month 
Second application, after Jeaves} Cloudy for two} .85 inch fell May 5} Cool for May. 
opened and before blossoms fell, days, then clear to 7. No more 
May 4, Bordeaux mixture andj till May 17. rain till May 18; 
Paris green. ty inch fell May 
18 to 19. 
Third application, just as last petals} Cloudy May 17 to} .77 inch fell May| Cool for May, 
were palling, May 2!, Bordeaux| 20,ciear21to22,| 23 to 25; 1.41] especially the 
mixture and Paris green. cloudy 23 to| inchfell May 28} last 10 days. 
June 3. to 31. May 30 (he cold- 
est day of the 
month 
Fourth application, June 1 to 2,| June4and7clear.| .63 inch fell June] Coo! until about 
Bordeaux mixture and Paris} All other days 1 to 5. Almost} June 8, when it 
green, from Junelito8] norain fell dur- began to warm 
cloudy or partly| ing the rest of} into regular 
cloudy. Clear} Juneexceptone| June weather, 
most of next heavy shower 
two weeks. June 27. 
Fifth application, June 16, Bordeaux] ........+.+:- teecves| J UY, Was , 8180) (Alix sss diviersicietl U Dele as 
mixture. very dry month. 
19Galloway, B. T. Bulletin 3, Division Vegetable Pathology, U. S. Department of Agriculture, 
1892, pages 39 and 40. 
20 Jones, L. R. Ferrocyanide Test for Bordeaux Mixture, Garden and Forest, volume VII, 
1849, page 497. 
