BULLETIN 195. CALIFORNIA GRAPE ROOT- WORM. 25 



and slightly outward with wire netting or canvas, to get those that may 

 be on the outer parts of the vine. Handles may be attached to this, 

 so that it can be manipulated without stooping. Such a cage can go 

 over four or five acres a day, and there is little outlay save the time of 

 the men doing the work. Since the beetles, if taken in time, are dis- 

 tributed over a comparatively small portion of the vineyard, it means 

 but a day's work or two. This, then, can be repeated three or four 

 times, if necessary, without much expense, and the vines saved from 

 any further ravages of the pest. 



SUMMARY. 



This insect has been a destructive enemy of the vine in Europe 

 for many years, and for several years past it has been doing considerable 

 damage to the grape in California. A related native species is an 

 important pest of the vines in the East. 



It attacks both the roots and the growing parts of the vine above 

 ground. From June to May the insect is in its larval and pupal stages 

 underground. During May and June it works on the parts of the 

 vine above ground as a beetle. 



Many of the pupa? may be destroyed by deep cultivation for a radius 

 of two or three feet about the base of the vine. 



The beetles may be killed by a strong arsenical spray, or by jarring 

 into crude oil, or otherwise captured as they are shaken from the vine. 



