REPORT OF THE STATE ENTOMOLOGIST 1902 127 
11, 1901. The day was an ideal one, there being very little or 
no wind most of the time and the temperature ranging from 
about 30° in the shade to 68° in the sun. The trees were dry, 
and, despite the fact that there had been considerable cold 
weather and much snow the previous week, the trunks of the 
trees, even to the very base, were well exposed; consequently 
the insecticide could be applied to the greatest advantage. Most 
of this experimental work was limited to an exceedingly badly 
infested orchard of young appletrees near Albany. A number of 
these were dying and a considerable proportion of them were in 
extremely bad condition, owing to the work of this scale insect. 
20% mechanical crude petroleum emulsion. This mixture was ap- 
plied to 23 appletrees in the above mentioned orchard. The oil 
was obtained of the Derrick Oil Co. of Titusville Pa., and, after 
being drawn from the barrel, tested 41.1° on the Beaumé oil scale. 
The spraying was carefully done,,and, under the exceptional 
weather conditions noted above, practically every portion of 
each tree was covered with the mixture. The sprayed trees 
were numbered 344-66, and their condition at the time of spray- 
ing was as follows: nos. 344-347, 349, 350, 353, 355, 355a, 
357, 361-863 were all very, very badly infested with the 
scale, a large proportion of the bark being literally covered by 
the pest. Trees 348, 352 and 359 were dead. Tree 351 was very 
badly infested, and trees 354, 358 and 364 were rather badly 
infested. A few scales were to be seen on tree 360, 865 was badly 
infested, and only a stump remained of tree 356. 
In addition to the appletrees named above a number of other 
kinds of fruit trees on adjoining premises were sprayed with 
the crude petroleum. Most of these trees were in a fairly vigor- 
ous condition, though a few were somewhat badly infested by 
the scale. . 
An examination of the appletrees in midwinter raised consider- 
able apprehension and it was feared that the insecticide had 
caused serious injury, but investigation Mar. 10 showed that 
the crude petroleum had not damaged the trees so much as was 
feared. The tips of some branches were dead, and a number of 
trees had died during the winter; but, as most of them were in 
very bad condition on account of scale infestation, it is hardly 
fair to attribute all the damage to the insecticide applied. In 
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