258 CULTURE OF THE GRAPE. 



the vines are taken up in the spring, the canes should 

 be cleaned, and all the crevices thoroughly washed with a 

 solution of one pound of potash to two gallons of water. 

 A brine made of one quart of salt and two gallons of 

 water is also effectual. 



Other species of bark-lice are found to some extent. 

 The Coccus Adonidum, or mealy bug, is a bark-louse, cov- 

 ered with a dow^ny, white scale, which is frequently seen 

 in graperies, especially where other plants are kept. It 

 draws from the sap of the vine, lodging in the axil of the 

 leaves and in crevices, or in the bunches of fruit ; and 

 proves very injurious, disgusting, and difficult to reach. 



The same application of potash as in the previous case, 

 if thorough, will be found effectual. . . . Still another 

 species of lice is mentioned by Dr. Harris, as follows : 



"Many years ago, when on a visit from home, I ob- 

 served, on a fine native grape-vine that was trained 

 against the side of a house, great numbers of reddish- 

 brown bark-lice, of a globular form, and about half as 

 large as a small pea, arranged in lines on the stems. An 

 opportunity for further examination of this species did 

 not occur till the summer of 1839, when I was led to the 

 discovery of a few of these lice on my Isabella grape- 

 vines '"by seeing the ants ascending and descending the 



