392 Report of the Horticultural Department op thbj 



sprayed in bloom is shown in Fig. 2. The following table shows 

 the number of fruits which set on typical branches sprayed 

 repeatedly in bloom compared with typical branches not sprayed 

 in bloom. 



Table XI. — Fbuit-Setting on Typical Branches' of Fall Pfpfin. 



Sprayed repeatedly Not sprayed in 

 iQ bloom. bloom. 



Ho Per ct. Ko. Per ct. 



Whole number of clusters examined. ... 235 21S 



Clusters which set no fruit 222 94 12 6 



Clusters which set 1 fruit 9 4 68 31 



Clusters which set 2 fruits 79 36 



Clusters which set 3 fruits 3 1^^ 41 19 



Clusters which set 4 fruits 1 % 17 7y2 



Clusters which set 5 fruits 1 ^ 



Average number of fruits per 100 clus- 

 ters on June 4 9 • 180 



Apple trees sprayed but once while in hloom. — In the tests which 

 have just been considered an effort was made to hit with the 

 spray each blossom soon after it opened. For this reason the 

 treatments were given at intervals of from one to two days dur- 

 ing the entire blooming season. Tests were also made in four 

 other a'pple orchards in which the treated trees were sprayed 

 but once while in bloom. General observation in these orchards 

 confirmed the conclusion that spraying the open blossoms often 

 prevents their further development. Particular observations 

 were made on two varieties which had been sprayed once in 

 bloom. These were Pumpkin Sweet, commonly called Pound 

 Sweet, and Baldwin located in the orchard of J. B. Collamer «& 

 Son, Hilton, N. Y. These observations were taken in the way 

 already described for Mcintosh, p. 388. It is interesting to com- 

 pare the results, as given below, with those o'btained with trees 

 which were sprayed repeatedly during the blooming season. 



Observations made June 5 on branches of a Baldwin tree 

 which was sprayed in full bloom on May 23, and of a corre- 

 sponding Baldwin tree which was not given this treatment show 

 results for typical branches given in the table below. 



