136 HOT-HOUSE. [January. 
OP INSECTS, THEIR DESTRUCTION, ETC. 
In this department, insects begin to increase by hundreds, 
and too frequently their ravages are very obvious before their 
progress is arrested. We will treat of those which are most 
common, under their respective heads, with their nature and 
cure, as far as has come under our observation. 
Aphis rosw, of the natural order of Hemiptera, or what 
is commonly known by Green Fly, Green Lice, &c, infect 
plants in general, and are particularly destructive in the 
hot-house to Hibiscus 7-dsa-si>iensis, Asclepi(ts, Crdssulu toc- 
cinea, Lantdna, &c, and many other plants of a free-growing 
nature. They attack the young and tender shoots at the 
point, leaving a dark filthy appearance on the foliage. 
Many remedies for their destruction have been offered to 
the public by various writers, each equally secure in his own 
opinion. Extensive practice alone can show the most easy 
and effectual cure. Fumigating with tobacco is decidedly 
the most efficacious, and in the power of any to perform. 
Take a small circular furnace, made of sheet iron, diameter 
at top twelve inches, and at bottom eight; depth one foot, 
having a grating in it to reach within three inches of the 
bottom, which will leave space for the air to pass, and where 
the ashes will fall and be kept in safety, having a handle 
like a pail to carry it with. This, or anything similar, being 
ready, put in it a few embers of charcoal, ignited to redness; 
take it into the centre of the house, and put therein a quan- 
tity of moist tobacco. If it attempts to burn or flame, 
sprinkle a little water thereon ; and, as it consumes, continue 
to add tobacco until the house is entirely full of smoke, 
observing always to do it in still, cloudy weather, or in the 
evening. If it is windy, the smoke is carried off without 
having half the effect, and requires more tobacco. The 
house must be closely shut up. There are several plants 
whose foliage is of a soft downy nature, such as lMitrojiiiims, 
Callacdipus, Salvias, and many of the Lantdiias, Vincas, 
with several others that cannot stand strong fumigation 
without danger. These should be put down in the house, 
or under the stage. These fumigations will have to be 
repeated frequently, the time for which will easily be per- 
ceived; and, when required, ought not to be delayed. 
