368 
tained both in the field and insectary have been very grati- 
fying and plainly indicate that, if proper methods are fol- 
lowed, several of the most destructive pests of this crop may 
be readily controlled. 
During this month I made two visits to Wahiawa for the 
purpose of getting additional notes on cabbage pests. ]\Ir. 
A. W. Eames, of that place, is much interested in the work 
I have undertaken. At our suggestion he has purchased a 
good spraying outfit, and during the coming season, he 
will endeavor to carry out, on a comparatively large scale, 
the methods which my experiments on cabbage insects have 
indicated as being profitable. 
I may state that I have commenced my demonstrations 
with the first start of the crop ; namely, in the seed beds, and 
I have found that unless the seedlings are protected by a 
gauze covering or by repeated spraying there is apt to be a 
loss varying from 5 per cent, to 50 per cent., according to 
locality. 
The experiments which I conducted in September, with 
the cooperation of Mr. F. G. Krauss, on Aphis maidis on 
broom corn, at the U. S. Experiment Station, proved imprac- 
ticable, as was anticipated. However, some valuable data 
was obtained, and the time devoted to these experiments was 
by no means wasted. 
IMessrs. E. O. Hall & Son have received a supply of 
“Black Leaf 40,” and it is now offered for sale in Honolulu. 
This material, when used in combination with whale-oil soap, 
has proved very effective as a spray against plant lice and 
some species of mealy-bugs. 
Respectfully, 
H. O. IMarsh, 
Assistant Entomologist. 
