206 FUMIGATION METHODS 
the tree. The trees were treated in the hottest part of 
the day. ‘This, added to the overcharge of cyanide, 
caused many of the leaves to fall; yet it had little or 
no effect on the fruit, and all the scales were killed, 
Two-thirds of the dose would have been quite sufficient 
to have cleaned the trees. 
Lemons and mandarins stand the fumigation much 
better than the orange. ‘Taking two trees of equal 
size and treating them with the same charge, while 
the mandarin would not show any ill effect, the orange 
tree would lose a few of its leaves. Mr. Allen, there- 
fore, recommends always treating the latter at night 
or on cool and dull days. The night treatment appears 
to be the best, as a charge which would in the day- 
time remove leaves, and, perhaps, burn the tender 
parts of the twigs, would have no detrimental effect 
where the work was performed at night. He thinks 
that lemons and mandarins can be treated with very 
good results during the daytime, except on very hot 
days. 
When Mr. Allen first commenced his fumigating 
experiments in New South Wales the price of tents 
was so high as to make it appear to growers that this 
method of treating trees was quite out of the reach of 
the average fruit-grower; but several large growers, 
rather than pay a high price for material, bought 
strong calico and sail-cloth, and made tents from these 
materials, and these, after a fair trial, have stood the 
test quite as well as the more expensive duck tents, 
and cost only about one-quarter as much. 
The cost of material for tents made of sail-cloth 6 
feet wide, estimated by Mr. Allen, is as follows for the 
