Injurious Insects. 27 



Grape, continued. 



GRAPE-SLUG or SAW-FLY (Selandria vitis, Harris). Larva, 

 about one-half inch long^ yellowish-green with black 

 points, feeding upon the leaves two broods. 



Remedies. Arsenites. Hellebore. 



GRAPE-VINE FIDIA (Fidia viticida]. Beetle, resembles the 

 Rose-bug, somewhat shorter and broader. It appears 

 during June and July, riddling the leaves. 



Remedies. Jarring the trees ; the least jar is sufficient. 

 Poultry. 



GRAPE-VINE FLEA-BEETLE (Graptodera chalybea Illig.). 

 Beetle, about one-fourth inch long, feeding upon the buds 

 and tender shoots in early spring. 



Remedies. Arsenites. The beetle can be caught by jar- 

 ring on cold mornings. 



GRAPE-VINE ROOT-BORER (sEgeria polistiformis, Harris). 

 Larva, one and one-half inch or less long, working in the 

 roots. 



Preventive. Mounding as for the peach-tree borer. 



Remedy. Dig out the borers. Apply scalding water to 

 the roots. 



GRAPE-VINE SPHINX (Darapsa myron, Cramer). A large 

 larva, two inches long when mature, green with yellow 

 spots and stripes, bearing a horn at the posterior extremity, 

 feeding upon the leaves, and nipping off the young clus- 

 ters of grapes ; two broods. 



Remedy. Hand picking. 



There are other large Sphinx caterpillars which feed 

 upon the foliage of the vine and which are readily kept in 

 check by hand picking. 



PHYLLOXERA (Phylloxera vestatrix, Planchon). A minute 

 insect preying upon the roots, and in one form causing 

 galls upon the leaves. 



Preventive. As a rule, this insect is not destructive to 

 American species of vines. Grafting upon resistant stocks 

 is the most reliable method of dealing with the insect yet 

 known. This precaution is undertaken to a large extent 



