The Delta independent., 1902-05-30
H.~ :. r,.A. III. c.a,,.r Hen.
By Prof. C. P. Gillette.

pies. The writer knows of an orchard
near the Experiment Station that was
sprayed with an arsspical mixture three
times last summer asd in which fully
80 per cent Of the fruit was wormy st
the time OF picking in September. Aa
Other orchard 10 the same neighborhood
was sprayed twice and b I'd less than =
per cent OF woruy fruit at picking time.
What made tho difference? Why i Il
that one man sprays his orchard and
has very little wormy fruit and biz
neighbor. who also sprays. has nearly
all OF bis apples wormy? This is ques-
tion often asked and frequently dimcult
to answer satisfactorily. That . rsasos
exists for the different results there can
be no doubt. Tho object OF this paI o.
is to give the best directions that -,
can at present for the successful treat
ment OF this insect. Perhaps It will sx
plain to some why they have not met,
with better success in the past
No date can be fixed upon. yet spray
ing must be done at the right time II
the best results are to be obtained. The
right time 10 Immediately after the
blossoms fall and before the cslyess oe
the forming apples close. II there are
belated blossoms on the trees after the
great mass OF bloom has fallen. do not
wait for them il some OF the cslyces are
closing. II the trees do not all bloom
nearly together, spray the early bloom
ing trees fret and then 10 . few days
spray the others. Repeat the applica
tion in one week, or, at the latest, ten
days. Spray again about July 10Th.
Be thorough with the work. II viii
take more time and material. but u
spraying for this insect will pay at all it
will pay best to do the work we'll. Uss
q nozzle that throws a medium dns
spray. not mist. and direct It SO that
the liquid will be thrown into every
blossom or calyx. A misty spray will
no! carry as well into tho blossoms. To
make . thorough application it will b
necessary to direct the spray from at
least two sides of the tree. and il The
tree is large it will be slmost necessary
TO apply from all four sidss. 10 many
orchards the trees arc 90 closely set, 90
large, aud poorly psuned. that it is im-
possible 10 make a thoroughly good
treatment for the destruction Of cod!ing
moth larva.
The one who directs the nozzle for the
spraying will nud it a great sdvantag,
to be elerated as high as the bed OF
wagon box at least. II the trees are
large it will be we'll to use n step ladder
or dry goods box in the wagon to ele
vate him still u ore.
OShardists differ widely in opinion
a. TO the number OF applications that
should be made. Some. noticing that
the worms are most abundant late in
the summer think that spraying should
be continued throughout the season Of
growth and report excellent results from
spraying five or six or more times. How.
ever. 1t is the opinion OF those who have
tested the matter most thoroughly at
the various experiment stations of the
country that it does not pay TO spray
more than twice, II tho two applications
are properly made at the boat time.
Probably paris green is as effeclual as
any il we'll applied and il the liquid is
kept thoroughly agitated duriug the
spraying. Schesls's green would prob.
ably be a. sGectual as paris green, is
cheaper. and remains in suspension in
water better. London purple and ar
senate Of limo are readily kept In sus.
pension 10 water but are slower in their
action than the above mentioned pois-
ons, and probably lees cffectual in their
death dealing power. They have the
advantage Of being very cheap. Arson
ate Of lead 10 kept iu suspension without
difficulty aud 10 remarkable for its ad-
hssive quality aud its entire harmless
ness to foliage unless used in great eI.
cess. 1t kills slowly and its value for
the destruction Of the codling moth has
not been very definitely determined.
Paris green. Schsele's green, aud Lon.
don purple may be used in the proper
tion Of pound to l6O gallons OF water.
II 10 best to mix the poison in a small
amount Of water first aud thea in the
full amount for which It was prepared.
Fur each pound OF poison used, add to
the water ono or two pou nds OF freshly
slaksd lime. This will lessen the liabil-
ity OF the poison to burn the foliage.
Arsenats Of lime, by the Kedzie for.
mula 10 prepared ~ follows: boil two
pounds OF white arsehic and eight
pounds Of sslsoda Tor fifteen minutes in
two gallons OF good water. put into .
jug and label poison When ready to
spray, slake two pounds OF lime aud stir
it into 40 gsllous OF water. adding pint
Of mixture from the jug"