S'. dk,i\i\ell Sl ^or\^’ Gjuide. 
CANNELL’S mode of destroying the Green Fly without injury to 
by the means of 
FUMIGATION. 
PLANTS are of a good vigorous growth all leaves will be perfect, and if any of them begin to 
■SM yellow when in their young state sure enough there is sometliing wrong, and often 
it is said it is only a few green flies, whereas that few means thousands, and every day they are 
allowed to go on feeding so much, your plants are being eaten up alive, therefore to grow plants to 
l)erfection always have sufficient fumigating material in readiness, and apply it on their very first 
,apj)eaiancc. 
Perhaps there is no operation in the garden to be performed more bewildering to the amateur 
than the process of fumigating his greenhouse to rid the plants of the green-fly or aphis, yet few 
things are more easy to be accomplished. Our houses are 100 feet long, 12 feet wide, and 8 feet 
high, one of them requires 4 lbs. of our sjMScially prepared tobacco rag or paper, and if you can 
by these dimensions calculate the space of your own house you can send for or use the exact 
quantity required ; now comes the secret, and the .art or .skill of can’ying it out, that is to kill 
all the insects without injury to the plants, and to do this it requires every attention just at the 
particular time. Close and cover up all apevtures, for so much that escapes is so much money 
wasted ; the material should be moderately dry, that is to say, not quite dry or wet, but by no means 
water it, lay it on the bricks or other uninflammable floor, procure a red hot cinder and wrap it round 
with a piece of the cloth or paper, to be repeated at di.stances of 10 feet in length of house, by this 
time the house will be partially full add other pieces, as there is a just proportion of saltpetre to causi; 
it to consume itself, lay the remaining material along the pathway in a longitudinal form, so that they 
may touch, and one will ignite the other, so keep up a gentle fume for a long time (be sure and not let 
it flare), no plants like smoke, and the le.ss they are subject to it the better, but when it becomes 
necessary it must be done without causing them the least injury, and when plants have made quick 
tender growth from being kept close in heat and moisture are the things most difficult, and liable to 
injury, and a longer time must be taken, but when plenty of air has -been given, exposure to 
sun and wind, &c., so can a stronger and quicker dose be given. Ferns, Tropwolums, Verbenas, 
and Heliotropes are all very susceptible to injury early in the .season, and even the pure tobacco will 
injure them if applied in too great a quantity at once, the density of the smoke must be only to admit 
of 3 to 5 feet to be seen in the greenhouse through the glass, 8 feet for tender plants ; a very mild 
quantity of fumes will kill the young fly, tlie difficulty is to kill the old ones, and so long as they 
have strength to move so sure they will recover and multiply by thousands, .and nowhere does the old 
adage illustrate itself more plainly than in fumigating — “ What is worth doing is worth doing well.” 
We therefore always make it a point to commence in the evening and give another dose early in tin? 
morning, and it is surprising what a saving it is to give them the double dose, even the third. Kee|i 
the house firmly closed as long as it is convenient, then syringe, if we.ather permits, with clear rain 
water, standing two or three cans of well water in the house, as that has a wonderful quick effect in 
dispelling any objectionable odour ; if all this is cairied out as directed, green fly would become scarce, 
and our valuable plants much more beautiful, and of course satisfactory. When the process is going 
on, be particular that the fumes are not ascending in too great a volume, if so, when it rebounds from 
the glass, it will be sure to injure the foliage. AVhat is wanted, is a regular house full of mild smoke^ 
and this kept up from two to four hours, choosing dull still weather ; should the sun shine, a shading 
must be applied. 
Is. 2d. per lb. ; 6 lbs. 5s. 6d. ; 10 lbs. 10s. ; 28 lbs. 26s. 
AH Trade Orders must be accompanied with a Remittance. 
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