CARRO T CHR YSANTHEMUM 313 



Cauliflower. CAULIFLOWER or CABBAGE-WORM. See under CABBAGE. 



MAGGOT. See under CABBAGE, p. 311. 



Celery. CARROT RUST-FLY (Psila rosce). Minute whitish yellow 

 maggots infesting the roots and stunting the plants. 



Preventive. Late sowing and rotation of crops. Celery or 

 carrots should not follow each other. 



CELERY CATERPILLAR (Papilio polyxenes}. A large green caterpillar, 

 ringed with black and spotted with yellow, which feeds on 

 the leaves. 



Treatment. Hand-picking as soon as observed. 

 CELERY LEAF-TYER (Phlyccenia ferrugalis). A greenish cater- 

 pillar, feeding on the under side of the leaves. 



Treatment. Spray with arsenicals while the larvae are still young. 

 LITTLE NEGRO-BUG (Corimelcena pulicaria). Glossy black bugs 

 one-eighth inch in length, which collect in clusters in the axils of 

 the leaflets and cause the plants to wilt. 



Treatment. Kerosene emulsion or tobacco extract. 

 Cherry. CANKER-WORM. See under APPLE, p. 306. 

 PLUM-CURCULIO. See under PLUM, p. 329. 

 ROSE BEETLE. See under APPLE and GRAPE, pp. 308, 322. 

 SLUG (Eriocampoides limacina). Larva; one-half inch long, black- 

 ish and slimy, feeding upon the leaves ; two broods. 



Treatment. Arsenicals, hellebore, tobacco extract. 

 APHIS (Myzus cerasi). Blackish plant lice infesting the leaves 

 and tips of new growth. 



Treatment. Spray as soon as the first lice appear with whale- 

 oil soap or tobacco extract. 



Chestnut. WEEVIL (Balaninus proboscideus and B. rectus). A grub 

 working in chestnuts, making them wormy. 

 The weevil is a curculio-like insect. 



Preventives. Destroy wild trees where the insects breed. 

 Plant the most immune varieties. Gather and destroy the in- 

 fested nuts immediately after they fall. 



Chrysanthemum. CABBAGE-LOOPER. See under LETTUCE, p. 322. 

 CHRYSANTHEMUM LEAF-MINER (Oscinis sp.). Works on the leaves 

 of the chrysanthemum. 



Remedy. Hand-picking. 

 Clover. FLOWER-MIDGE (Dasyneura leguminicola) . An orange-red 



