MICHIGAN EXPERIMENT STATION BULLETINS 255 



to reproduce itself from the pit. This assumption, if but partially true, 

 may account for the above result. 



Wortlien Jennie,, which comes from Texas, proves to be of superior 

 quality here. 



GRAFES.—Vitis. 



The past season has been scarcely as favorable as usual fOr this fruity 

 and while all have matured later than usual, several of the later and less 

 hardy varieties have scarcely reached their full color and flavor. 



On April 12 to 15 one pound of copper sulphate in 25 gallons of water 

 was applied. 



On August 23, mildew having appeared upon a few plants, they were 

 sprayed with a solution of one pound of copper sulphate in 250 gallons of 

 water. 



The season throughout, having been unusually dry in this immediate 

 locality, grapes have been quite generally exempt from the attacks of 

 fungi. 



The only troublesome insect observed this season is the black aphis, 

 which attacks the tips of the grooving canes. In some cases the affected 

 tips have been cut away and burned, while in others they have been sub- 

 dued by applying a strong decoction of tobacco stems. 



The stakes upon which the vines in the southwest block have heretofore 

 been trained have now been replaced by a two-wire trellis, upon which the 

 plants are being trained, on what is commonly known as the Kniffin 

 system. 



The unusual exemption from frost, with mild weather and slight rains, 

 till past the middle of November, has resulted in the very general reten- 

 tion of foliage till near the present time (November 24), so that the 

 pruning of grapes, which is usually done in autumn, is yet in progress. 



For convenience in consulting and comparing varieties, grapes are 

 arranged alphabetically in a single table, and their species, or parentage, 

 given in a column devoted to that purpose. 



In such column the known, or inferred, species of the seed parent is first 

 given; and, in case of actual or inferred hybridization, the species of the 

 actual or supposed poUenating parent is appended with an x. 



The usual abbreviations of specific names are employed in such column. 



