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

II. o. Marsh, assistant entomologist,
in reporting on work done to H. NJ.
Ehrhorn, superintendent Of this divi-
sion, tells of interesting experiments
carried on in fighting pests Of ycge-
tables and flowers and tells Of the CO.
operation ho has received from Chin
csc gardeners upon whose places he
has been experimenting and some of
whom are ready TO use AL the med
icine" he recommends.
Mr. Marsh says
"On receipt of your Cablcgrun an
nouncing my Appointment as Assistant
Entomoiogist 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 Is, 1910 and COM
! menccd work Mt once.
During the past few years ! have
lccn working almost exclusively on
insects which affect sugar-beets and
In?1en vegetables ami after locking
! about a little concluded that - study
OF truck crCu insects offered excellent
opportunities IN these islands.
Accordingly, during the six weeks
that have been employed by the
Board, | have devoted my time to a
special study of the melon fly and the
japanese beetle. Careful life history
studies have been commenced with
both of these species and a rather eX-
tensive series OF field experiments
have been undertaken.
"The 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 rcpellcnts
and possibly also with trap crops rs
soon as time and equipment viii al
low
Several experiments have been
made against the Japanese beetle by
spraying with arsenicals. Thus far
arscnate of lead has not proved Of.
fectiye but fairly satisfactory results
have been obtained with Paris green
The melon fly and Japanese beet,
are exceedingly difficult species tt
successfully combat A more com.
plete knowledge lof their life history
is necessary and it is probable that
one or two years of patient study will
be required before effective contro
measures can be devised. ..s.s..sstt,
, In addition to the two species al
ready mentioned am also making
!. study OF the life history of Hymeni,
fascialis, Pontia rapae, Hellula I'm
dalis and other insects, destructive L
: the cabbage and beet. These insect
: once under control will cause the nov
discouraged grower to again try hi
luck In cabbage growing.
y Another species which | have Civ
+ en- considerable study Is Macrosiphun
sanborni, a reddish plant louise. whici
b anthemums. made series OF min
= spraying experiments with an oil
n emulsion, whale-oil soap and two mic
6 otine preparations against this lousC
One Of the nicotine preparation
= known as BLACK Leaf 40" proved a
effective and cheap remedy when use
n in combination with whale-oil soap.
4 shall soon submit detailed report q
q these experiments Tor publication 4
=, the Forester
a In all, during the past six week,
+ ] have made nineteen experiments
:, Some Of them have been repeate
4 from two to six times aud altogethc
q n considerable amount of sprayin
has been done. With all of these eS
perimcnts have personally prepare
: and applied the mixtures or solution
and noted the results The expert
: ments have been conducted in garden
y controlled by Chinese. These peopl
7 were A. first suspicious but are grad
ually becoming Interested and on
owner has become so impressed wit
: the good results obtained with IN
medicines ! have applied to hi
!, plants that he has purchased spray
u Ing outfit and will continue to figh
: the various pests which infest nj
l. CrDDS nlDnp tho lInau uhi,h 4 ~,