Los Angeles daily herald., 1888-02-12

10
rerles on t,ee, which is in very good
rurnnn6ENrs WITH RESIN COMPOUND.
he strongest application OF this
v'ag made on pear and plum, infested
1ifh a. rapax, August 9th; three
noate Of the compound to four OF
Vater. Experiment 1867, September
7th. all traces of waste had disap-
reared, not ipjuring the foliage OF
plum. The leaves Of the pear were
very brittle for the first few days, ana
some tips Of older leaves turned
bIack. but none came of, and other
Vise no injury was done. An oc-
casional living scale was found oc-
tober 9TH.
One part of the compound to two OF
water. Applied on February 2Sth,
On A. rapax on pear, Experiment
1907. Rain fell for two days follow
ing, and as the result perhaps was
not Is good as it would otherwise
have been. A careful examination on
March 9Th showed that a large part
o. the eggs had been destroyed, also
all the Young and many of the older
scales. On this tree they did not IN
crease. and on November zlst'
hardly any living scales could pc
found. Other experiments were maue
Of the same strength, on Aspi iiotus
Sd. on currant and A. rapax on pear
August 9th. Experiment 17o).
An but few gravid females we're
DESTROYED on pear, and very few re-
mained on such places where they
had been in thick layers on currant'
October 7th. few young scales we're
found or both plants; but hardly any
were living November 22d. The wash
disappeared in ten days, leaving the
trees in good condition; no leaves
fell.
Three parts of compound to eight oi
water were applied on orange, thickly
infested with lecanium hesperidun,
Sept mber 2. Experiment 184.) In
Eve days after application no living
scales could be found, and on none on
November %. The tree was not at all
affected by the wash.
One part of compound to four OF
water, sapplied on pear. with A.
rapax. February % experiment 1897.
DESTROYED all the smaller and part of
the older scales, but soon after the
scales were increasing again. The
same strength was also applied on
Diaspis rosae on rose, March s Tex
pertinent 1922. This effectively
cleared the plant of scales. And,
again. on L. hesperidum on orange.
September 2 experiment 1887. All
scsles were dead on September 9TH !:
and none living could be found
November 22d.
One part OF compound to eight of
water, on L. hesperidum on orange,
Sc ptember 2 (experiment 1927, de-
stroyed nearly all scales, hut many
living Young were found under mother
scales, September 7th; only very few
living scales were found in trees.
September 18th and October 7th but
on November 22d the tree was covered
with scales again.
Other experiments of this strength
were .slain and may be worthy of
IDention On L. oleac on orange.
and s.. several peach trees in full
blossom. infested ~.'h the Lecanium
bred from oak "a. agrifolia), aere
also many OF the scales survived; the
trees in consequence were loaded
with fruit, as we'll as those not treated.
EXPERIMENTS ON APHIDAE WITH RESIN
COMPOUND.
The Wooly Aphis (Schizonoura
lanigera), the Cabbage Aphis (Aphis
brassicae). the Plum Aphis (Aphis
pruni), and Aphis on rose (Siphono-
phora rosae). Two experiments were
made at Berkeley on the Woolv Aphis.
in conjunction with Messrs. Klee and
McLennan. One and three parts
of the compound were used to eight
of water. Owing to imperfect spray
ing, only the last did effective work.
The leaves of the trees were falling
the time of spraying, and the
effect of the solution, especially
ON trees where three to eight parts Of
wash were applied was very notice
able, as the first tree lost about half,
while the second lost nearly all it's
leaves. On my visit to the place a
nSrth late. however, there was little
difference in the trees treated and
Others infested with woody Aphis, for
those also begun to lose their leaves
about two weeks after, as / was in
formed by Mr.. McLennan the gard
ener, who is very careful observer.
Mr.. Klee recommends this wash in
the proportion Of one and one-halt
pints compound to one gallon OF
water.
have made numerous other ex.
periments and always had complete
success in killing this insect with
one part compound to eight parts oi
water. With this proportion also,
those on roots which were reached,
we're killed. | would recon mend the
sam, viz, one part Of the compound
to six parts Of water, on Woody Aphis.
On the other hand, the Plum Aphis,
Cabbage Aphis, etc., are much cas-
ier to kill, only one part of compound
to eigh t of water was used in expert
ments at Berkeley, august 1O,) on
Plum Aphis, and none were living
on examination, August 18th. AT
this strength the Aphis will die in
stantly and will not be able to move
. leg il once wet. I have killed them
successfully even with wash as low
as one part of the compound to six
teen parts OF water, and would recon-
mend one part of the compound to
twelve parts Of water; for Plum Aphis,
Aphis on rore, etc. At this strength
it may be safely used on any garden
and even on the most tender hot
heuse plants, without the slightest
injury to the plants themselves. 1t
should be used somewhat stronger on
the Cabbage Aphis. One part Of the
compound to eight parts of water
will be found effectual At this
strength it was found that
the larYaa of Svrnhna A;as