48 SIXTH ANNUAL BEPORT 



loNA — 0, 3. Isabella, or seedlings thereof— o, 2. Israella — o, 1. Ives 

 — 0, 2. Martha — o, 1. Maxatawney — o, 2. North Carolina — o, 2, 

 Northern Muscadine — o, 1. Rebecca — o, 2, Salem — o, 2. Wilder 

 (hybrid with vinifera) — o, 1. 



SOUTHERN FOX {mdpina.)—o, 0. From the investigations of Prof. 

 Planchon it results — as was anticipated from the great differences in 

 character which it presents compared with the others — that this 

 species is entirely free from Phylloxera in any form. The root is not 

 only very tough, but has a perceptibly bitter taste, which, doubtless, 

 renders it obnoxious to the insect. Prof. Planchon examined it 

 thoroughly in North Carolina, where other vines in the vicinity were 

 suiFering from the insect. 



From the above enumeration we may gather that, with the excep- 

 tion of vulpinai no species of cultivated vine is entirely free from the 

 attacks of either the gall-making or root-inhabiting types; neverthe- 

 less, ww^/^sra is least and riparia most subject to the former; oesti- 

 valis least and vinifera most subject to the latter. 



Of vinifera, a few varieties under certain conditions seem to 

 exhibit a degree of resistance in this country, and it is singular that 

 some relative immunity has not as yet been noticed among the varie- 

 ties of this species in Europe.* 



Of riparia, the Clinton, Taylor, Golden Clinton and Marion, seem 

 best to resist. 



' Of aestivalis, all the species enumerated resist well, and I would 

 especially mention Norton's, Herbemont and Cunningham as vigorous 

 growers. 



Of Lahrusca, the Concord, Dracut Amber, Israella, Martha, North 

 Carolina and Wilder resist well. 



This enumeration is founded principally on the effects of Phyl- 

 loxera in the central portion of Missouri, as ascertained by quite 

 extensive notes and observations made during the past two years. 

 I have also examined many of the varieties mentioned, with similar 

 results, in portions of Kansas, Illinois, New Jersey, Pennsylvania and 

 New York. Many other varieties have been examined, but only in 

 isolated instances, and I have thought best not to place any in the 

 lists which I have not repeatedly examined and studied. The Arnold's 

 hybrids, which I have examined, all suffer, but some of them more 

 than others. 



Prophylactic Means op coping with the Disease. — It occur- 

 red to me that by grafting the more susceptible OTito the roots 

 of the more resistant varieties, we might, in a great measure, 



* Since the above Avas Avritten, I notice that M. A. Pellicot already .innounces the fact that a cer- 

 tain variety (Colombaud) has shown a comp.irative power of resistance — living long after other varie- 

 ties succumb. (Mcssaycr Ayricole, Fev. 10, 1S74, p. 14. 



