498 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



Although the vines arc not killed, they are so enfeebled that they 

 make but little growth and the crop is much curtailed. All 

 varieties are affected in West Virginia, including the wild fox 

 grape, Vitis labrusca. It is stated that in the South the Scupper- 

 nong, or southern wild fox grape, is immune from attack. The 



FIG. 357. The grapevine root-borer (Memythrus polistiformis Harris): male 

 and female moths on wild lettuce leaf under grapevine natural size. 

 (From Brooks.) 



species has been observed from Minnesota and Missouri, eastward 

 through Ohio and Kentucky to West Virginia and North Carolina. 

 The parents of the borers are clear- winged moths nearly 

 related to the peach-tree borer, currant-borer, and raspberry- 

 borer. The females are seven-eighths inch long with wings expand- 

 ing 1^ inches. They are a dark lustrous brown color, th^ fore- 



