BULLETIN 195. 



CALIFORNIA GRAPE ROOT- WORM. 



13 



dered about looking for a suitable place for entering the earth three 

 or four hours before they actually disappeared. By the following 

 morning they had gone about halfway down the tube, or three inches, 



FIG. 8. Root of a vine with bark eaten off by root-worm. 



and before the end of the same day they had burrowed through the six 

 inches of soil in the tube. 



As soon as the larvae reach the roots of the vine they begin feed- 

 ing, and it is generally the smaller rootlets that are first attacked, 



FIG. 9. Stem leaf and fruit eaten by root beetle. 



although we have found young larvae around roots of considerable size. 

 These smaller roots may be eaten off entirely. The larger roots are 

 injured by the larvae gouging out long strips of the bark, which some- 

 times take almost any direction, but on the roots of medium size these 



