Evening bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1895-1912, 1910-09-16
PEST Fight
TOLD IN REPORT

u. o. Marsh. assistant entomologist, .
in reporting on work done to Il. NJ. ,
Ehrhorn superintendent of this divi- .
sion, tells OF interesting experiments ,
carried on in lighting pests of vcge- !
tables and flowers and tells of the CO. |
operation he has received from Chin !.
ese gardeners upon whose places he F,
has been experimenting and some of
whom are ready TO use all the med |
icinc" lac recommends.
Mr.. Marsh says:
ION receipt oil your cablegrmn an
nouncing my Appointment as Assistant
Entomologist to the Territorial Board
of Agriculture and Forestry ! resigned
from the United States Department Of
Agriculture, bureau Of Entomology.
and proceeded to Hawaii. | reached
Honolulu July rs, 1910 and com
menccd work AT once.
During the past few years haze
Teen working almost exclusively IN
insects which affect sugar-baets and
gn.Hen vegetables ami after looking
about little concluded that study
u( truck crCn insects offered excellent
/ opportunities IN these islands.
Accordingly, during the six weeks
that | have been employed by the
! Board. | have devoted my time to
special study of the melon fly and the
! japanese beetle. Careful life history
studies have been commenced with
both OF these species and n rather eX-
tcnsiye series Of field experiments
have been undertaken.
! "rhc experiments with the melon
fly have thus far been confined to the
use of poisoned bats but the tests
have not been continued long enough
to permit definite conclusions to be
drawn. Further experiments will be
made against this pest with repellents
and possibly also with trap crops as
soon "a time and equipment will al
low.
Several experiments have been
made against the Japanese beetle by
spraying with arsenicals. Thus far
arsenatc of lead has not proved eff
fcctivc but fairly satisfactory results
have been obtained with Paris green.
THE melon fly and Japanese beetle
are exceedingly difficult species TO
successfully combat A more COM
pletc knowledge. of their life history
ls necessary and II is probable that
: one or two years oi patient study will
be required before effective control
measures can he devised
|, I'm addition to the two species al.
ready mentioned | am also making Q
study of the life history Of llymenII
fascialis, Pontia rapae. lIellula I'M
p dalis and other insects, destructive .,
=, the cabbage and beet These insect,
( once under control will cause the nov
5 discouraged grower to again try hi,
< luck in cabbage growing.
' Another species which ! have Civ
en- considerable study Is MacrOsiphun
sanborni. reddish plant louise, which
4 at times. is serious pest on chrys
h anthemums. made n series Of min,
q spraying experiments with an OF
n emulsion, whale-Oil soap and two mic
g Otine preparations against this louise
;. One Of the nicotine preparations
$ known as BLACK Leaf 10" proved al
effective and cheap remedy when use,
n In combination with whale-oil soap.
Il shall soon submit detailed report o
a these experiments for publication II
!, the Forester
a I'm all, during the past six weeks
!, have made nineteen experiments
:, Some of them have been repeate,
Il from two TO six times and nltOgethe
q Il considerable amount of spraying
has been done. With all of these OK
periments have personally prepare,
: and applied the mixtures or solution
. and noted the results. The expert
> mcnts have been conducted In garden
u controlled by Chinese. These peopl
9 were at first suspicious hut are grad
. ually becoming Interested and on
. owner has become so impressed witt
i the good results obtained with tn
9 medicines ! have applied to hi
plants that he has purchased n spray
u Ing outfit and Will continue TO ngh
y the various pests which infest hi
i crops along the lines which | hoy