THE PHYLLOXERA. 



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the curculio screen. Hand-picking, which has been resorted to 

 by some growers, is too expensive except upon very choice vari- 



Fig. BS. 



eties. It L claimed by the Buhacli company that their prepar- 

 ation of pyrethrum will kill this pest. Should this prove to be 

 the case, the screen will not be needed. 



Phylloxera or Grape Vine Louse {Phylloxera vastatrix). This is 

 the insect that is so destructive to vines of European vineyards, 

 and has destroyed thousands and thousands of acres of vines 

 there. It is a native of this country and by some means was 

 transported across the Atlantic and has propagated and developed 

 with great rapidity upon the more tender European Grapes. It 

 is generally found in two forms, the leaf and root form. The 

 former is very small, not over one thirty-second of an inch in 

 length, of a light yellow color, and sucks the juices of the leaves 

 and tender branches, causing small warts or galls upon them. 

 The leaf forms of the Phylloxera is shown at Fig. 65: . front 

 view of the young louse; b, back view; of the louse; c, the egg; 

 d, a section of one of the galls ; e, a swollen tendril ; f, g, h, 

 mature egg-bearing gall-louse, lateral, dorsal (or back), and ventral 

 (or belly) views; i, the antenna; /, the two-jointed tarsns. 



The root form (Fig. 66) is of about the same size and causes 

 similar swellings upon the fibrous roots. Fig. 66, illustrates the 

 root phylloxera: a, the roots of a Clinton vine, showing the 

 swellings; I,, young louse in the hibernating stage; c, d, antennse 



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