ANNUAL WINTER MEETING AT WARRENSBURG. 243 



attacks of one or more of these parasites. We can impair the vigor of 

 our plants by giving them too much stimulating food, or we can im- 

 pair their vigor by not giving them enough of certain ingredients 

 necessary for plant growth. 



A lengthy article might be written on this subject alone, but we 

 have not the time at our disposal. Learn, however, to feed your plants 

 properly; give them good cultivation, and you will find that they will 

 resist many of the insect pests which prey upon them, and also the at- 

 tacks of many of these parasitic fungi. 



In returning once more to a discussion ef the mildews that occur 

 on the grape vine, we will mention some of the preventives that have 

 been us^d with success. 



Tne American grape mildew (^Peronospora Viticola), which was 

 the first species described, is far more'destructive than the second form. 

 The plant body or mycelium, of this species you will remember is in- 

 ternal, and the branches which bear the reproductive bodies, forms 

 little white tufts on the under side of the leaf. 



Now moisture is absolutely necessary for the growth of this fun- 

 gus, and the parasite is rarely found on leaves that are kept constantly 

 dry. 



It is found that the grape is rarely troubled with mildew if the 

 leaves are protected from dew. We think it will pay any one hav- 

 ing only a few vines to protect them, either by artificial means or by 

 training them under trees. 



Wm. Sanders says: "That a good locality for vineyards is one 

 where there is exemption from late spring frosts; from heavy dews 

 during summer nights, and from early frosts in autumn ; and the best 

 results will be found where ail these conditions exist, and failure will 

 follow in proportion to their deficiency. 



About the cheapest method of fighting the disease is to select such 

 varieties for planting as are known to be able to resist the mildew. 



The following list of American vines with regard to their resist- 

 ance to mildew was prepared by G. E. Meissner. I will read the list : 



TABLE OF AMERICAN VINES (PRINCIPAL VARIEEIES) WITH REGARD TO THEIR 



RESISTANCE TO MILDEW {Peronosporo)- 



I. Category: almost entirely exempt, even in unfavorable seasons 



sons and localities. Cynthiana, Norton's Virginia, Concord, 

 Hartford, Ives, Perkins, Champion, Cottage, North Carolina, 

 Elvira, Missouri, Riesling, Noah and Taylor. 



II. Category: suffering somewhat, hut not serioufily^ in exceptionally 



unfavorable seasons^and localities. Cunningham, Hermann, Ne- 



