44 HORTICULTURIST'S RULE-BOOK. 



LEAF-ROLLER (Phoxopteris comptana, Frol.). Larva, less 

 than one-half inch long, feeding on the leaves, and rolling 

 them up in threads of silk ; two broods. 



Remedies. In first stage of attack apply hellebore or 

 arsenites if the attack is very early, or if it is after the 

 fruit is off. Burn the leaf-cases. 



ROOT-BORER (Anarsia lineatella, Zeller). Larva, about one- 

 half inch long, whitish, boring into the crown of the plant 

 late in the season and remaining in it over winter. 

 Remedy. Burn the plant. 



ROOT-LOUSE (Aphis Forbesii, Weed). From July to the 

 close of the season the lice appear in great numbers on 

 the crowns and in the roots of the plants. 



Remedies. Rotation in planting. Disinfect plants com- 

 ing from infested patches by dipping the crowns and roots 

 in kerosene emulsion. 



SAW-FLY (Emphytus maculatus, Norton). Larva, nearly 

 three-fourths inch long, greenish, feeding upon the leaves ; 

 two broods. 

 Remedies. Hellebore. Arsenites for second brood. 



WEEVIL (Anthonomus signatus, Say). Beetle, one-tenth 

 inch long, reddish, feeding on flower-buds, particularly those 

 of the polleniferous varieties. 



Preventive. Covering the plants with newspapers or 

 cloth is said to be the only effective means of checking the 



Remedies. Plaster and crude carbolic acid mixture. 

 Sumac. APPLE-TREE BORER. See under APPLE. 

 JUMPING SUMAC-BEETLE (Blepharida Rhois, Forst.). Larva, 

 half-inch long, dull-greenish yellow, feeding on leaves ; two 

 broods. 



Remedy. Arsenites. 



Sweet-Potato. SAW-FLY (Schizocerus ebenus, Norton). 

 Small larva about one-fourth inch long, working upon the 

 leaves. The fly is about the size of a house-fly. 



Remedies. Hellebore and pyrethrum are to be recom- 

 mended ; also arsenites. 



