218 
Calculating the number of borers per hundred plants and. bring- 
ing the comparable rows together, it appears that 
Row 1, treated with coal tar, had 19.3 borers ; while 
Row 8, had 78.1 borers. 
Also, that 
Row 2, treated with coal tar had but 6.6 borers per hundred plants; 
while 
Rows 4, 5 and 6, not treated, had 61.5 + fr ‘f 
From this it appears that row 8 had about four times as many 
borers as row 1, in spite of the fact that it received two applications 
of Paris green and water; and that rows 4, 5 and 6 had on the aver- 
age more than nine times as many borers as row 2. 
The result of this experiment in the use of coal tar, taken in con- 
nection with that of last season, would seem to make it safe to say 
that this substance, probably through its offensive odor, acts very 
beneficially in preventing injury from the squash vine borer. It has 
the advantages of being very cheap, of ready application and of be- 
ing quite lasting in its effects. In seasons when the moths are very 
numerous, and the attack unusually severe, it is possible that much 
injury would result in spite of this preventive. It is also possible 
that in case its use should become general over a large extent of 
country that it would not prove permanently beneficial. At the 
present time, however, we know of nothing so likely to save the 
squash crop from its most dreaded enemy, as coal tar used among the 
plants in some way that is favorable to the constant giving off of its 
powerful odor. 
Paris Green for the Codling Moth. 
Spraying trees with Paris green and water has been often recom- 
mended as a preventive against injury from the codling moth (Car- 
pocapsa pomonella, l.). In order to learn to what extent the harm 
wrought by this destructive insect may be thus avoided, we sprayed 
a few of the trees of the station orchard the past season, and on a 
portion of the trees made careful notes, intended to show as nearly as 
possible how much benefit resulted from theapplication. The trees 
selected for the experiment were eleven in number, of which nine 
were of the Fall Pippin variety, and the remaining two Rhode 
Island Greening. On June 3d we sprayed five of the Fall Pippin 
trees, and one of the Rhode Island Greenings with Paris green and 
water at the rate of a teaspoonful to ten gallons. At this time the 
fruits were about the size of a cranberry. Alternate trees were left 
unsprayed for comparison. 
The liquid was applied to the trees by means of a garden engine 
and the ‘cyclone nozzle.” The nozzle attached to a hose was tied 
to the end of a light pole, about ten feet long, by means of which it 
could be raised and lowered at will, for spraying different parts of 
the tree. 
We found this method of application quite laborious. The 
amount of water that the nozzle would allow to pass through it was 
so small,that from a fourth to half an hour was necessary to thorough- 
ly wet the foliage of a large tree. We tried attaching two nozzles to 
sh end of the hose, which performed the work considerably faster 
than one. 
