251 



The conclusion which can be drawn from the table seems to be that 

 the treated sections held their leaves better, made as good a growth in 

 height, and without exception a greater growth in diameter, or "eali- 

 pcr," than the untreated sections. That this increased growth was due 

 ent irely to the fungicide it will not be possible to maintain, for this differ- 

 ence may possibly have been brought about in part or wholly by varia- 

 tions 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, satisfac- 

 torily 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 

 xxvi and xxvn 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 powdery mildew (Podosphccra 

 oxyacantlice (DC.) Winter f) made its appearance in small amount on 

 the stocks in August and offered an opportunity to observe the bene- 

 ficial effects of Bordeaux mixture in the treatment of this disease. 

 Seven treatments with Bordeaux materially decreased the amount of 

 the disease and proved superior to seven treatments with ammoniacal 

 solution.* Three early treatments with either fungicide had no pre- 

 ventive 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. 200. The treat- 

 ments 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: 



~ *Soe Bull. No. 3 Div. Veg. Path., 1802, p. 58. 



