The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1893-09-12

4 A tree can be sprayed with the hes
+ known compound, and every veStig,
% the blight DESTROYED. and in les
rhan ten days the blight viii be seer
SSalu, neeeSSitating y re-spraying o
-Ee tree. Many plans have been tries
% Neep the blight from ascending tht
/ trunks q trees, but without avail. Or
trees thar have had their trunks paint
81 with sticky substance. the blight
has been found adhering 10 the wind.
ward side, proving that the blight
moves with and BY the wind.
The next in order is the well-knowr
Z coffee blight, ,Dactyiopj,sSl. Il green.
+ i>h insect, that also spins = eottony
T cell IN which 20 lay its eggs. This
Z blight / Troublesome pest to the cot
Z lee grower, and is readily distinguished
from the Rtlrindria which, on being
( crushed, gives 3 dark red chocolate
I color, while the DGctglOpins gives 8
I grseuiSh yellow color. The young OF
I this blight are not unlike the young
! OF the PulrinGrid, except in color;
( like them they are almost too small TO
. la seen by the uusided eve. They also
attack the leaves and bark of many
trees and plants, and the mature in
SecCS with their cottOny cells full of
eggs, are often seen hanging in great
clusters from the bark and leaves of
the trees they effect. By spraying
they can be kept under TO some extent
anu IN private gardens where there
are but comparatively few trees, il is
not difficult matter 10 keep the trees
clear OF this blight, but on 3 coffee
plantation, where there are thousands
OF trees, il is i difficult matter to keep
the trees clean and make the enter
prise profitable. II the trees are not
kept clean, then diminished crop is
the result, and permanent damage
done 10 the trees. On the other hand,
the cost Of spraying is large and will
nearly eat up the entire profits. Some
planters who have set out plantations
Of young coffee trees on Hawaii, state
that IS yet no blight has made its ap-
pearsnee on their trees. I sincerely
hope it may never get there, but it is
almost certain that il will reach every
district where coffee is grown if
means are not found to entirely
eradicate it. The existence of
this blight on the islands OF
0shu, Molokai, Maui, Hawaii and
Kauai, TO say nothing Of the proba-
bility Of the P5tlriHdri0 which con-
slider Z much worse blight, spreading
TO all the islands will act as a strong
deterrent against enterprise in the
starting Of new coffee plantations,
and may possibly render Improbable
those plantations already established.
The next, though not by any means
least, i the cane bOrer-SphaeHO-
phOrUS O6scurUS. Probably there is
greater loss in one year by the ravages
Of this insect than by all other pests
in ten years, but fortunately the borer
does not take it all. He leaves some
thing foe the poor planter. The de-
structiOn OF this insect would mean
great deal for the sugar industry OF
these islands 1t is not only the guam
tity Of cane destroyed each year by
the bOrer, which in itself amounts to !
a large sum, but il is imperative on
the planter, in order 10 keep the ravs-
yes Of the bOrers within bounds, to 1
burn of the trash as soon as possible 4
after the cane Is cut, in order to de-
strOy the great quantity of bOrers
that are left in the tops and dead cane. |
This method no doubt destroys great 4
numbers Of the bOrer, both in the 1
beetle and Larvae stage, but at the
same time it destroys an enormous
quantity Of vegetable matter, that by
light should be plOwed into the land,
Ind it would be, if it were not for the
lorer. Our sugar lands are surely
osIng much Of their fertility, necessf-
sting the employment each year Of
Increasing quantities Of costly fertil-
Zers. Much Of this could be avoided
( it were not for the bOrer. The bene-
its Of blowing in the trash are not
,verrated; it has been tried, and the
esult has been very satisfactory as
egards the growth Of cane, but not so
q regard to the bOrer, as the cane on
ueh fields suffered more than other
ields that had been burnt of. THIS
insect also attacks the cocOanut aud
many other palms; it also infests the
ansna.
There are several other kinds OF
ests affecting the trees on this island.
| red scale i found on the irOnwoOd I
nd other trees. This scale-is long,
arrow scale that adherss closely to (
be young stems Of the trees, but as
ct does not seem to affect them Sc &,
iOusly. / have had specimens of this
eaIe sent 10 me from MapGlehu, Mo
lkai, where it is found on several
iuds OF trees, and Is said to have
cen taken there from Honolulu !
bout two years since. 4 different
ind Of scale-red when young, and
ITning black when mature-has been {
,und in several gardens in Honolulu. !
be young insects that form these {
.aies are very small, aud after emery f
Y from under the parent scale,
here they are Matched, wander over q
le leaf until they find a suitable spot :
hen they insert their beak and alb c
lTb the sap. In few days a hard, |
-otecting scale or armOr Is formed
yer the back Of the insect, under i
hich, IN the case Of the female in '
CT, the eggs are laid and Matched. :
These scales are difficult to kill by :
lrayIng unless il is repeated every n
y or 80 for a week or ten days. The i
ard shell Of the scale adheres so :
0sely 10 the bark that it is difficult +
7 the wash TO get underneath and |,
III the insect The young, before the :
ale : formed, are easily killed by a j
sill TFash.OF kerosene emulsion, and :.
on after all the young are Matched, r
2 old scales die and fall of. .
These scales are no doubt the same b