Till-: (riJAi'i.; Root- Worm. 



29 



hardly escape tlie eye of any viiieyardi.st on the loukinir, lor this 

 pest. On varieties of grape having a velvety nnder-snrface to the 

 leaves the l)eetles eat only to the lower skin, on others entirely 

 through the leaf. Some leaves may he riddled l)y them, as shown 

 in the picture on the title-page. Look foi" the work of the heetles 

 from the latter part of June until the leaves dro[) in autumn. 

 Young vines may l)e seriously injured 

 in this wav hv the heetles. 



I. €/' 



Usually, however, far nn)ie injurv is 

 done hv the insect in its a'l'uh or ^arva 

 stage than by the heetles. Ihit as the 

 grubs are small and work on the roots 

 underground, the vineyardist unfamil- 

 iar with the insect and its work would 

 not suspect their presence, even though 

 his vines began to decline and linally 

 died. A large majority of the grubs 

 are to be found near or directly beneath 

 the point wdiere the larj>:e roots leave 

 the trunk, and " it 

 would a ]) p e a r 

 that the v e r y 

 young grub, after 

 it has fed for a 

 short time on the 

 small 11 b 1" o u s 

 roots, turns its 

 attention to 

 the larger and 

 tougher portions, 

 eating off the 

 bark, and following the smaller roots outward. Where the grubs 

 are numerous and as many as 68 have been taken from about a single 

 vine, the injured roots simply rest on a bed of the castings of the 

 grubs." 



Figure 9 shows a portion of the larger roots and trunk of one of 



9.- 



Portions oflm^ge roots and trunk of grape-mne killed 

 by the grub. Note that viost of the fibrous roots 

 have been eaten off by the grub. 



