INSECTS INJURIOUS TO THE GRAPE 



443 



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

 California, the imported grape root-worm * is sometimes destruc- 

 tive, has practically identical habits, and is controlled by the 

 same methods. 



The adult beetle is about one-quarter inch long, brownish in 

 color, and covered with grayish-white hairs, with a stout body 

 and long legs, as shown in Fig. 369. The full-grown larva is 

 about five-eighths inch long, whitish in color, and usually rests 

 in a curved position as shown in Fig. 370. The head is slightly 



FIG. 372. Portions of three grape roots denuded of their bark and fibrous 

 roots by grape root-worms, and part of a similar root taken from a 

 thrifty vine, showing its normal bark and rootlets. Reduced in size. 

 (After Slingerland.) 



narrower than the body and yellowish-brown, as are the well- 

 marked spiracles on the side of each segment. 



Life History. The adult beetles appear about the close of the 

 blooming period, or in late June and early July in the latitude 

 of New York, and live for a month or more. They emerge earlier 

 on warm, light sandy soils, and later on heavier soils. In a few 



* Adoxus vitis Fourcroy. A small, shining, brown or black beetle, one- 

 fifth inch long. See Quayle, I.e. 



