The record-union., 1897-04-15
TO GUARD AGAINST PESTS.
Some Valuable Advice to Growers Of De,
CiduOuS Fruita.
Secretary Lelong of the State Board
of Horticulture on Tree
Spraying.

| Secretary of the State Board of Horti-
culture B. M Lelong has prepared a
bulletin for the instruction and guidance
of horticulturists throughout the State,
relative to the use of spray for fruit
trees. Past experience has proven that
much of the Paris green used in spray
ing was SO adulterated as to be worth
less. and those interested will do we'll to
follow the advice given in the bulletin,
which is printed herewith:
THE GOBLIN MOTH.
AT. the State Fruit Growers Conven-
ton in November, 1895, says Mr.. Le-
long, many complained of being no
longer successful in using Paris green
for the destruction of the Goblin moth
larva. Many reported serious loss; 9TH
ers the loss of their entire apple and
| pear crops, although they had sprayed
with what they supposed was Paris
green. Most of them had secured eX-
cellent results heretofore and We're at a
loss to understand the reason of the fail
ure, and had thus become preiudiced
against its use. We at once instituted
an investigation of the various sub
stances sold as Paris green. OF nineteen
I
10 per cent. of arsenious acid. Several
samples, although of nearly the same
shade of color as the pure Paris green,
contained no -arsenious acid
The results of this investigation were
published February 30, 1896 and the
growers We're requested to demand from
the dealers written guarantee that
the articles contained at least so per
cent. arsenious acid. Evidently the
dealers became alarmed at the great
fraud they had perpetrated upon the
growers for most all the cheap stuffs
| We're withdrawn from sale and soon
after they advertised Paris green of
from 30 to 5S per cent arsenious acid,
and guarantee to this effect accom-
| panied each order. The consequence
was that last year there was better and
! less Wormy fruit than for years past,
and IN many instances where large ship
ments of apples We're made from or
| chards that were formery badly in
fected not single larva was found.
| Now that the season for spraying is at
hand, the growers are again warned
against purchasing adulterated Paris
green, or cheap stuffs sold as such, for
ticed. During the past week several
samples were received for examination,
which We're found to be grossly adulter-
ated.
TIME TO SPRAY.
| Spraying for the Goblin moth to in
sure the best results must be done at
| the proper time, and if not thoroughly
| done is a waste of time and material.
| Those that spray at the proper time
and with the greatest thoroughness are
the ones whose fruit commands the best
prices and is much sought after. Spray
ing should commence as soon as the
petals of the blossom fall, to be followed
by second application about two weeks
after the first. Growers must watch
matters closely, and, if necessary, spray
third time, three weeks after the sec
ond application, but this may not be
required, depending largely upon the
season. Above all, do not forget to
spray with Paris green of the best
quality, using one pound to 200 gallons
of water, without any additions.
GOBLIN MOTH AND APPLE OR
PEAR SCAB.
Where the presence of apple or pear
scab is observed the following fungicide
should be added to the Paris green
Sulphate of copper, % pounds; fresh
| lime, 20 pounds. Dissolve the sulphate
of copper in 20 gallons of water; slack
the lime, and add to the copper solution
| and strain into the spray tank with
| the Paris green.
ARSENATE OF LEAD.
| +l,;- :, 49,
were made last year with very salts
factory results, and the experiments of
this year will establish it's merits fully
The arsenate of lead is prepared by
dissolving II ounces of acetate of lead
and four ounces of arsenade of soda in
100 gallons of water. This is the
strength used in Massachusetts for the
destruction of the gypsy moth cater
pillars, and a milder solution may be
| equally efficacious for the destruction
of the larya of the Goblin moth
Professor Forbush says: This is
arsenate of lead, a poison slower in it's
action than the other, but which has
| three distinct advantages % 1t can
be used at any desired strength without
serious injury to the foliage; CD it is
visible wherever used as it forms
whitish coating on the leaves; CD it has
adhesive qualities, given it probably by
the acetate of lead, and therefore re-
mains on the leaves for a much longer
period than Paris green. When suffi-
cient glucose was added to strong
mixture of arsenate of lead, it withstood
transforms and remained on the foliage
during the entire season."
The fact that the poison can be used
three or four times stronger, or more,
than necessary without injuring the
foliage is strong point in it's favor,
and the cost of the material is quite low.