254 FUMIGATION METHODS 
finely, and thus causing the gas to generate very quickly, 
seemed to tend to defoliation as much as anything. 
However, a very strong, new growth started, and the 
trees soon assumed a splendid appearance. Curiously 
enough, lemon and mandarin trees, though treated in 
the very hottest days, lost no leaves at all. Fumiga- 
tion, no doubt, is the only royal road to clean trees— 
it absolutely blots the red scale out, and if done before 
the fruit is too large, a clean crop is assured, as the 
expansion of the fruit causes the scale to drop off. 
Brown olive scale is decimated, but not always alto- 
gether destroyed, though it looks as if, of the two, it 
would be easier to kill. So far I have treated 1,800 
trees of various sizes, and I am sure growers will be 
pleased to know that the average cost per tree, includ- 
ing labor, price of tents, chemicals, etc., only amounts 
to 74d. ‘Thus for 7d you get a healthy tree and clean 
fruit. How much more is this worth than a sickly 
tree and unmarketable fruit? To show how fumiga- 
tion is regarded on Emu Plains, I can inform those who 
are in doubt that since my neighbor growers witnessed 
the effect of the treatment here some have already com- 
menced, and others contemplate doing so.’’ 
M. Brown, of Messrs. Rodgers & Co., Galston, 
writes Mr. Allen as follows: ‘‘ We have fumigated 
this year some 1,800 trees, and are entirely satisfied 
with the result. Westarted fumigating the first week 
in May, and a live scale cannot be found on any of the 
trees done. Fully 50 per cent. of the scale have been 
cleaned off the trees, and I hope to see the greater part 
of the remainder cleared off before the bulk of the 
fruit is marketed. Of course, you will understand 
