520 Report of the Horticulturist of the 



with the European species which are found among the cultivated 

 varieties. One hundred and sixty-nine cultivated varieties have 

 been under test. The tests have mostly been made in Station vine- 

 yards, but vineyards in two other localities have also been under 

 investigation. In many cases the same variety has been tested in 

 more than one season and in two or three localities. 



Reports of progress have appeared from time to time in the 

 Station's Annual Reports and in papers prepared by the author 

 for horticultural or scientific societies. 1 Since the circulation of 

 the Annual Reports among the fruit growers is somewhat limited 

 this account of the investigations is presented in bulletin form. 

 It includes much that has not previously been published and is 

 complete to date. The work has been extended year by year till 

 all the standard amateur and commercial varieties of this State, 

 and also many new or little known varieties, have been tested. 



Previous to the undertaking of these investigations, but little 

 was definitely known concerning self-sterility among cultivated 

 American grapes. The opinion had occasionally been advanced 

 that with certain varieties, especially with some of the Rogers hy- 

 brids, cross-pollination 2 was an advantage if not absolutely essential 

 to the production of fruit. It had been observed that such varieties 

 fruited imperfectly or were perhaps absolutely barren when standing 

 alone, but gave much better results when they were located adja- 

 cent to other kinds of grapes. Although these things had attracted 

 the attention of a few careful observers they were not made the 



i Eleventh Annual Rep. N. Y. Agrl. Exp. Station, 1892: 597-606. 



Thirteenth Annual Rep. N. Y. Agrl. Exp. Station, 1894: 636-0 48. 



Fourteenth Annual Rep. N. Y. Agrl. Exp. Station, 1895: 320-325. 



Notes on Self-pollination of the Grape. Rochester Meeting A. A. A. S., 

 1892: Garden and Forest, 1892: 451, 452. 



Fertilization of Flowers in Orchard and Vineyard. Annual Meeting On- 

 tario Fruit-G rowers' Assn., Orillia, Canada, 1894. 



Notes on Self-fertility of Cultivated Grapes. Boston Meeting S. P. A. S., 

 1898: American Gardening, 19: 666 (1898). 



2 The term " cross pollination " is used in this report to designate the con- 

 veying to a pistil of pollen from another variety rather than from other vines 

 of the same variety. 



