INJURIOUS INSECTS 



327 



Quince. ROUND-HEADED BORER. See under Apple. 



Raspberry. CANE BORER. See under Blackberry. 



ROOT BORER. See under Grape. 



ROOTGALL-FLY. (Rliodites radlcum Sacken ; order 

 Diptera. ) The larva produces galls on the roots of the 

 raspberry, blackberry, seriously affecting the health of 

 the plant. These swellings must not be confounded with 

 the true root-galls found on raspberry, blackberry, apple, 

 and peach. This root-gall is a fungous disease, espe- 

 cially noticeable in nursery stock. 



Remedy. The best remedy thus far seems to be the 

 destruction of all infested plants. 



SNOWY TREE CRICKET. See under Blackberry. 



RED SPIDER. (Tetranychus telarius Linn.) A small 

 red mite, found on plants both in greenhouse and out- 

 doors. 



Remedy. Strong streams of water from a hose, 

 kerosene emulsion. 



Rose. -ROOTGALL FLY. See under Raspberry. 



MEALY-BUG. See under M. 



ROSE SLUG. (Selandria rosce Ilarr. ; order Hymen- 

 optera.) A slug-like worm, soft greenish or yellowish, 

 about one-half an inch long. It eats large patches in 

 the upper surface of rose leaves. The leaves appear 

 scorched, and drop off. Feeding is done by night, and 

 the slugs rest on the under side of the leaves during 

 the day. 



Remedy. - Forcible stream from a hose will wash off 

 many. Spray with arsenites. 



SAN JOSE SCALE. (Aspldinhix pernidosus fWnst. ; 



