I'livroMYc i 



J 53 



was at first probably more or less confined to the Mississippi 

 Valley and states to the eastward. It lias been known for a 

 long time as a pest in the Middle Atlantic State's, extending 

 westward to the Mississippi, but in the states farther to the 



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KAi'K I,K\K WITH F. \KI.V STACK IK I)O\VNV MII.DKW 

 (Photograph by II. II. Whet/el) 



northeast, while equally common, it has been less disastrous in 

 its effects. This is to be accounted for in part by the vigorous 

 growth of the vine under more constant rainfall ; but the greater 

 injury farther west has been attributed particularly to the fact 

 that the fungus appears earlier in the season. The disease was 



