Ants in Gardens

Contrary to general belief, ants do more goodthan harm to a garden; but as they are unsightly on flowers, it is
advisable to tie a little wool round the stems of standard roses and
other things upon which they congregate. They will not crawl over the
wool. A little sulphur sprinkled over a plant will keep them from it;
while wall-fruit, etc., may be kept free from them by surrounding it
with a broad band of chalk. Should they become troublesome on account
of their numbers a strong decoction of elder leaves poured into the
nest will destroy them; or a more expeditious method of getting rid of
them is to put gunpowder in their nests and fire it with a piece of
touch-paper tied on to a long stick.