Fumigating For Black Scale
I would like to know the best method of eradicating the black scale from
my orange trees, whether by spraying or fumigation?
Spraying has been given up as a suitable method for controlling the
black scale on citrus trees, and the only recognized method of merit
where the scale is bad is by fumigation with hydrocyanic acid gas. You
should communicate with your county horticultural commissioner, who,
through inspectors, will see that you have a good job done, at the right
time and at as moderate price as is compatible with good work. It is
impossible to 'eradicate' the black scale, but there is a great
difference in the amount that can be killed, and it pays to have a job
done as near perfectly as possible. Similar methods of attacking other
scale insects on citrus trees are used.
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