Wasps destroy a good deal of fruit, but every pair of wasps killed in spring saves the trouble and annoyance of a swarm in autumn.
287. Cure for Sting of Wasp or Bee
A little ammonia applied to the puncture will speedily relieve the pain, and so will the juice of an onion obtained by cutting an onion in half and rubbing the cut part over the part affected. It is necessary, however, to be very careful in any attempt upon a wasp, for its sting, like that of the bee, causes much pain and frequently induces considerable swelling. In case of being stung, get the blue-bag from the laundry, and rub it well into the wound as soon as possible. Later in the season, it is customary to hang vessels of beer, or water and sugar, in the fruit-trees, to entice them to drown themselves. A wasp in a window may be killed almost instantaneously by the application of a little sweet oil on the tip of a feather.
288. To protect Dahlias from Earwigs
Dip a piece of wool or cotton in oil, and slightly tie it round the stalk, about a foot from the earth. The stakes which you will put into the ground to support your plants must also be surrounded by the oiled cotton or wool, or the insects will climb up them to the blossoms and tender tops of the stems. Insects may be prevented from climbing up stakes, trees, &c., by encircling them with a broad ring of tar, which may be renewed as often as may be necessary. Small pots inverted and placed on the top of stakes form a useful trap for slugs, snails, earwigs, &c., which crawl into them for shelter in the early morning, and may thus be caught and destroyed. When it is sought to take earwigs by this means, the bottom of each pot should be filled with a wisp of hay or dried grass, or a little cotton wool.
289. To free Plants from Leaf-Lice
The following is recommended as a cheap and easy mode of getting rid of this pest:—Mix one ounce of flowers of sulphur with one bushel of sawdust; scatter this over the plants infected with these insects: they will soon be freed, though a second application may possibly be necessary.