White-grub or muck-worm:—When lawns are infested the sod must be taken up, the grubs destroyed and new sward made. When the roots of single plants are attacked, dig out, destroy the grubs and, if the plant is not too much injured, reset.
The remedies given in the table above are prepared as follows:
MECHANICAL REMEDIES
1.—Covered boxes:—These are usually made of half-inch stuff, about eight inches high and covered with mosquito netting, wire or "protecting cloth"—the latter having the extra advantage of holding warmth over night.
2.—Collars are made of old cans with the bottoms removed, cardboard or tarred paper, large enough to go over the plant and an inch or so into the ground.
3.—Cards are cut and fitted close around the stem and for an inch or so upon the ground around it, to prevent maggots going down the stem to the root. Not much used.
DESTRUCTIVE REMEDIES
4.—Hand-picking is usually very effective, and if performed as follows, not very disagreeable: Fasten a small tin can securely to a wooden handle and fill one-third full of water and kerosene; make a small wooden paddle, with one straight edge and a rather sharp point; by using this in the right hand and the pan in the left, the bugs may be quickly knocked off. Be sure to destroy all eggs when hand-picking is used.
5.—Kerosene emulsion is used in varying strengths; for method of preparing, see Chapter XVII.
6 and 7.—For use of whale-oil soap and miscible oils, see Chapter XVII.