366 Report of the Horticulturist of the 



cross-pollinated was, under the circumstances, remarkably large. 

 Take, for example, the results with Brighton fertilized by Ca- 

 tawba. Both at Highlands and Penn Ynn these varieties had a 

 large percentage of unopened blossoms when the Catawba clusters 

 were applied to the Brighton. Eight Brighton clusters at High- 

 land were thus supplied with Catawba pollen and all of them set 

 fruit. When the fruit was ripe one cluster ranked 95, one 90, 

 one 85. The two lowest were rated 55 and the average rating was 

 74.4. At Penn Yan five Brighton clusters were likewise supplied 

 with Catawba pollen. One cluster so treated ripened but four 

 fruits, one was almost perfectly filled and the remaining three 

 were well filled. Omitting the first named cluster, the average 

 rating was 97.5; including it the average was 80. While, as has 

 been said before, these averages cannot be taken as indicating 

 with strict accuracy the efficiency of Catawba as a fertilizer for 

 the Brighton, they show that, even under the most unfavorable 

 conditions which obtained in these trials, a surprisingly large pro- 

 portion of the blossoms became cross-pollinated. In all cases 

 where the number of clusters under experiment is large enough to 

 give some indication of the value of the variety as a fertilizer for 

 self-sterile sorts the results with the different varieties may be 

 looked upon as comparable, because the treatment was similar in 

 all the tests with the exception that in the Highlands vineyard 

 the clusters to be cross-pollinated were not brushed with the clus- 

 ter selected for furnishing the pollen, but the two kinds of clusters 

 were simply inclosed in the bag and shaken together. 



COVERING the CLUSTERS. 



As has already been stated, all of the clusters which were used 

 in these experiments were covered before the blossoms opened, 

 using paper bags for this purpose after the manner described in 

 Bulletin 157. This work was largely done before the varieties 

 commenced to liloom. The clusters in the Highlands tests were 

 bagged -Tune 7 and 8 ; with few exceptions those at Penn Yan were 

 bagged June 9 ; and those at the Station were bagged at various 



