{Or EMERALD-GREEN) 
Its Uses, and Methods for its Application, 
AS A MEANS OF DESTRUCTION OF 
ORCHARD MOTH CATERPILLARS. 
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The object in view in bringing forward the use of spraying 
with Paris-green is the pressing need which has long been felt 
of having some kind of application at hand which is cheap 
and sure in its action, and which can be brought to bear at 
once when required on any, or all sorts of, moth caterpillars 
together (whatever their various natures or previous histories 
may have been), and will kill the whole collection of ravaging 
hordes at once, without damaging the leafage. 
For some years back trials have been made, in many isolated 
cases, of various kinds of treatment which it was hoped might 
be of use in lessening this yearly amount of loss; but as these 
experiments were seldom carefully recorded as to details or 
results, they have been of little public benefit. 
Therefore, about the end of February in last year, 1890, at 
a conference of fruit growers held at Evesham, a Committee 
of Experiment was formed, of gentlemen personally interested 
in the subject (and also qualified practically, as well as scienti¬ 
fically, to superintend experiments in orchard treatment, and 
report results), in order to try the effect of any kind of sprays, 
washes, or other applications which they might judge likely to 
be effective in destroying the caterpillars on orchard trees 
without injuring the leafage; and to meet at various different 
centres from time to time, so that the whole Committee could 
judge of results of various treatments, and consultation and 
detailed reports of the method of treatment respectively take 
place, or be given by the members. 
Paris-green was one of the applications especially selected 
for experiment, as having been known for many years to act 
trustworthily as an insecticide in the United States and 
Canada, and also because, from the Government reports of both 
