
t 
! 
 —Expprivents wita Nursery Stock. 657 
increased growth was due entirely to the fungicide it will not be 
possible to maintain, for this difference may possibly have been 
brought about in part or wholly by variations in the soil. That 
none of the mixtures injured the “buds” it is believed is clearly 
shown. 
_ The answer to question 3, as to the effect of fungicides on the 
growth of budded stocks, is here, for the Bordeaux mixture at 
least, satisfactorily found, for both Windsor and Yellow Spanish 
stocks did better under treatment with Bordeaux than without 
treatment. There still remains a doubt as to the beneficial effect 
of ammoniacal solution. In all cases where used it was apparently 
slightly injurious to the foliage. The leaves assumed a yellowish, 
“unhealthy appearance. Plates 25 and 26 show the comparison 
between treated and untreated “ buds.” 
; MAZZARD CHERRY STOCKS. 
~~ 1891.— One row of 468 stocks was experimented with, receiving 
as nearly as possible a course of treatment identical with that 
given the Mahaleb stocks. During the season, as in the case of 
the Mahalebs, only an insignificant amount of leaf-blight was 
present, affording no opportunity to test the fungicides. The pow- 
dery mildew (Podosphera oxyacanthe, (DC.), Winter ?) made 
its appearance in small amount on the stocks in August and offered 
- an opportunity to observe the beneficial effects of Bordeaux mix- 
ture in the treatment of this disease. Seven treatments with Bor- 
deaux materially decreased the amount of the disease and proved 
_ superior to seven treatments with ammoniacal solution.* Three 
| early treatments with either fungicide had no preventive effect. 
1892.— The same row as that treated in 1891 was used this 
season, but budded with three different varieties identical with 
those budded on the Mahaleb stocks, as shown in the table on — 
-p. 668. The treatments were similar in all respects to those given 
the Mahaleb stocks. The condition of the stocks at the close of 
the season is shown by the following table: 


* See Bull. 3 Div. Veg. Path., 1892, p. 58. 
83 

