INJURIOUS INSECTS. 23 



Harlequin Cabbage-Bug (JIurgantia histrionica, Hahn), — 

 Bug about a half-inch long, gaudily colored with orange 

 dots and stripes over a blue-black ground, feeding upon 

 cabbage ; two to six broods. 



Remedies. — Hand-picking. Place blocks about the patch 

 and the bugs will collect under them. In the fall make 

 small piles of the rubbish in the patch and burn them at 

 the approach of winter. 

 Lice. — Kerosene emulsion. See Aphides. 

 Maggot {Pliorhia Brassicce, Bouche). — A minute white mag- 

 got, the larva of a small fly, eating into the crown and roots 

 of young cabbage and cauliflower, radish, and turnip plants. 

 Bemedies. — Carbolic acid emulsion applied the day fol- 

 lowing the transplanting of the cabbage plants, and repeated 

 once a week for several applications. Remove a little earth 

 from about the plants and spray on the emulsion forcibly. 

 Bisulphide of carbon is generally preferable on cabbages 

 and cauliflowers, however. Use about one teaspoonful to 

 the plant, inserting it in a hole in the soil just underneath, 

 but not in contact with, the root. Press the hole together 

 immediately to prevent the escape of the vapor. All in- 

 fested plants should be burned. 



The "club-root" of cabbage is not due to the maggot, 

 but to a fungus, which see (page 55). 

 Carnation. Twitter. — A peculiar curling and tying-up of 

 the leaves and flower-buds on the tips of the stems. Proba- 

 bly due to various species of insects, one of them a plant- 

 louse. 

 Bemedy. — Cut off and burn the affected part. 

 Carrot. Parsley-Worm. — See under Parsley. 

 Cauliflower. Cauliflower or Cabbage-Worm. — See under 

 Cabbage. 

 Maggot. — See under Cabbage. 

 Celery. Green Lettuce- Worm. — See under Lettuce. 



Parsley-Worm. — See under Parsley. 

 Cherry. Canker- Worm. — See under Apple. 

 Plum-Curculio. — See under Plum. 



