



1 
which it may be used with safety to the foliage, and de- 
struction to the insects is so slight that it must be regarded 
as impracticable. Tests of solutions of corrosive sublimate 
and carbolic acid were found to injure foliage without being 
fatal to the insects. — 
It is possible that had a thorough application of the kero- 
sene emulsion, or a solution of whale oil soap been made at 
the first appearance of the leaves, the damage might have 
been largely prevented. The advantage of treating the in- 
sects at this time is two fold. The leaves are small and 
upright, so that the liquid can be applied to both surfaces 
more readily, and the aphides are then few and the number 
that survive will be but a mere fraction of those that escape 
after the trees are in full leaf. 
Various lady-bug beetles (Coccinellidae) are known to 
destroy great numbers of aphides. During the latter part 
of the season these insects appeared in unusually large 
numbers, the vast swarms of aphides probably furnishing 
favorable conditions for their multiplication. This sug- 
gests the question: May not some artificial food be found 
for these beetles, that can be applied to fruit trees in the 
form of a wash, and thus favor their multiplication in all 
seasons ? | 
PARIS GREEN FOR THE CIRCULIO. 
It has frequently been stated that Paris green and water 
applied to the foliage of plum trees will prevent injury by 
the circulio. As an experiment, one-half of aseedling plum 
tree was sprayed with this mixture at the rate of one ounce 
to ten gallons. This was the only bearing plum tree at 
hand except those in the poultry yard, which are rarely at- 
tacked by thecurculio. The first application was made May 
10, a second May 17, and a third later, date not noted. 
Unfortunately the doses proved too severe for the foliage, 
though the effect was not immediately noticeable. About 
midsummer the leaves on the sprayed side of the tree began 
to drop and continued to do so until more than half of them 
had fallen. The fruit did not mature naturally, and mostly 
dropped early, hence it could not be determined how far, if 
at all, the injury was due to the curculio. 
HYPOSULPHITE OF SODA AS A PREVENTIVE OF SCAB ON THE 
APPLE AND PEAR. 
In our report for 1885, p. 231, the result of an experiment. 
is noted in the use of a solution of hyposulphite of soda for 
the apple scab, Fusicladium dendriticum (Fckl.) from 
which it appears that the fungus was somewhat lessened 
