The Hawaiian gazette., 1916-12-08

pf1nci pol area. bot the An0moln Deetle
!, ~ eehlAea - yet 70 the Plantations Of
, Ithe Honelnlu Plantation Company and
4 the Oahu Sugar Company uneluding
4 the Waipio substhtioh), Additional
ilAentfys q infeEtafipn ara 10 ~ expect
lied, Mr. eWekef Informs iis, - etlIile
: Ildft9ntlbh 90 cane ffaibs and the like a
J IlambIe )n(atn ~ which adult htstlei
rlhmty ~ f1ospSltfd from phe position
llof = IIhi|laiip1 20 hnpllleh 2 He soasid-
itfR t14Af. flIot tlI8 chances Of such
an button ~ tnIll iiidted cohptred
LYNN fklNtf6fit y own power a. light
Is11Rkt they hfkt not btsN}lb kuiablished
fhuit IN zane area1 Of 0phf, he
thitksl eat ~ atfribntGd kions 10 the
n thk fsmnlks deposit their eggs
\ itfofe stpefeihe from the tbil FOR
~ eRtxSS fspoHs that 70 his
IIafe|f hlitihtiiah hffasl once badly In
fttIf1, have not remained 70, and that
Ile0nd tfopa Of cane ghge ff6wiig in
Intlgf where previously much 81 the
id,ilrt wa filIsd BY the gfpbs, the
lIs1ol3 m6ef heavily infested one ye6f do
i 1of ileefsthti nv tbihtide, with the worst
lsbolh ofiths Pt'eyidas year. q
4 / il,lfsiIf tIls wet Eeetbsf * last
| iIfiht1f Ia Nfathf ~ kinm fhngns was
an active agent in, reducing the multi
plieatioh OF the gfubs. II was also oh,
served that the grubs sought the dtieT
ridges when the fields were wet from
the heavy rains, thus relieving the
dampge Immediately upon the cane
Itstools In the furfow. ."i - -.
Il sit Is today an open question
whether the retention Of cane trash on
4 ia field win be beneficial or otherwise In
eontendiag With the Anomala beetle,
Acsordfng to Mr. Swezey, from the
Eredt abundance Of grubs beneath the
1 layers Of trash in fields where trash has
been left II looks as though this or.
n GAME matter would offer an attraction
that would keep them from the cane
stooh On the other hand, IL may fur
hish 70 favorable a breeding ground as
q Ito result IN such a vast Increase in the
l, total number Of beetles that in the end
the damage to the cane might be great.
Ter than II the trash had been burned.
This point win be studied with
great fnteresf, ae we feel that the prac
Use ofStefaining trash may have an i'm.
portant begripg ONE way or the other.
Enemies Of Ahpmala 2 "
Work along this, subject has re,
a solved itself into Introducing and es
i tablishinR q humber of natural enemies
!, and parasites which have been found
through Mr.. Muir's efforts in the ORR
eDt Outing, the past three years.
~" A. number Of white grub parasites
! were located IN the Philippines, and
much Of the past year has, been devoted
, TO efforts to successfully transport
these to- Honolulu. Much material
was lost before successful ways of han,
ding the insects wee found. The
length Of the yoyagr, infrequeney OF
. ships, and irregular sailing, schedule,
have contributed to the disappoint
lments which are TO be recognized as a
lpart of the routine Of this work. A
lquaNtity of material was brought in by
Mr. Muir when he returned in March
q Mr. osbprn, who has assisted in the
work in the Philippines, from Novem
Der, 1915, brought, more when he re.
turned in July, OF this year. At the
present writing Mr., Muir is ON his way
to Japan with colonies of parasites
where he will be met by Mr.. Osborn
who will return to Honolulu with the
material, There is great advantage IN
making conEgnments in this manner
under expert attention.
+ 5The more important of the para.
sites now under Consideration are the
wasps. Scotia maniac, Tiphia com,
. pressa, Tiphia sp,; and the flies; Pro
sena sp: and Dexia So. Mr.. Swezey
supplies information on Scotia manilae
as ,follpys;
",Tbis 10 q small wasp that digs IN
ha' !
paralyzes it; then Rffixes an egg in al
Sprjoht position On the middle Of the
: yentfal surface Of the grub. The egg
matches IN Q few days, a cocoon Is spur
in which further development to thu
adult takes place In three or fonl
weeks, according to the season. Thii
parasite breeds on gtpbs Of both AnO
= mails, and Adoretps Japanese rose
beetie) and, apparently. produces sue
| eessiSe generations throughout thu
%"Mr. Osborn was very successful IL
breeding Scotia at, Los, Bapps, p. /.
and sent consecutive shipments. of thu
: cocOops, for several months. In al
; twelve 'eonti gnpents, 4totalling abou
!. 1000 were received between Januar,
Iahd May So few adults emerge
: from, These eoeoons that il was decided
!. IA introduce colonies Of adults and t.
this end, Mr., Osborn brought a.cage o
: then, in July. Fifty survived thu
) Journey Some were, liberated in in
!, Tested araas others retained for breed
N There IL now definite evidence tina
) these Scotia wasps are becoming
q established, They have recently beef
q observed in numbers in field IL of tn
! Oahu Sugar Co, where the first liberia
4 tioa was. made in March, 1916,
Z Other cane Disease -
,tInferfiohss top rot is reported b,
!; Dr.. Lyon rs having appeared on oah
md Mani during the year. Durint
!, 1.-THE previous eight years this disea.s
= has been recognized on Kauai only
2 | In saclf instance the malady was frs
!. observed in one or two stools nea
y bthe edge Ofea field and from these
spread rather rapidly TO adjoining cant
ny cutting and burning all afecte
q eInes, the spread Of the disease wa
|, srrested. According to DR.. Lyon thi
|. disease has great personalities TO
y harm. Our knowledge Of il is yet i'm