INSECTS INJURIOUS TO THE GRAPE 



503 



of western Xew York, Pennsylvania, and northern Ohio, but the 

 species occurs generally throughout the Mississippi Valley and 

 the Eastern States, and has been reported from California. " The 

 insect thrives best in vineyards which are neglected, and in the 

 absence of cultivation and timely spraying it is likely to become 



FIG. 361. J The life cycle of the grape root-worm- 

 ( After Slingerland.) 



enlarged and natural size- 



a serious pest in any vineyard throughout its range of distribu- 

 tion. This is especially the case in light, sandy soils and in regions 

 where grape growing is a considerable industry." A nearly 

 related species,* has been known to seriously injure the foliage 

 in Texas, but it is not known whether it affects the roots. In 



* Fidia cana. 



