New York Agricultukal Experiment Station. 515 



insects and fungi were well under control and before the hailstorm 

 of that year ruined the crop. The ratings indicate vigor as judged 

 by the eye from general appearance of vines, and amount, size 

 and color of leaves. 



Table IV. — Relative Growth Rating of Grape Varieties on Different 



Stocks in 1910. 



A comparison of this table with Tables II and III shows that 

 in the main the greater productiveness of the vines agrees largely 

 with vigor of vine. In the judgment of the writer the superiority 

 of the grafted vines is best shown by vigor as indicated in this 

 table. Grape-growers may well take note of the figures here set 

 forth. 



Resistance to msect and fungus pests. — Species and even varie- 

 ties of grapes are very unequally subject to animal or fungus para- 

 sites. This elementary fact, impressed upon grape-growers from 

 the earliest times, would, of course, suggest observations as to the 

 resistance of the vines in this experiment to the various vinej^ard 



