Pocahontas star herald., 1914-08-28
Cotton Leaf Worm

Prof. Geo G. Becker, State En-
tomologist at Fayetteville;
Fayetteville, Ark, Aug, ss, 1914.
John II. Kizer, Special Agent, Po'
cahontas, Ark.
Dear Mr.. Kizer:
Yours of the I9th inst, has been
forwarded on TO me at Little Rock.
| would not advise using Paris
Green for the cotton when il is
possible TO get Arsenate Of Lead.
And l would be especially careful
about applying 1t IN the form of
spray. Paris Green contains what
we call soluable arsenic. Arsenic
which desolyes in water aud which
when applied on the cotton plants
will cause the foliage to burn. II
1t is applied IN the form Of a spray,
one should take a pound of qnIok
lime for every pound OF Paris Green
that is used, slack it aud add the
slack lime to the solution con tain
ing the Paris Green before apply
ing. Paris Green when used IN The
form Of a spray will be applied
plenty strong when used at the rate
one pound to $50 gallons Of water.
One should, Of course, be sure to
have some sort Of a agItator on the
spraying machinery to keep the
Paris Green from settling at the
bottom.
Arsenate of Lead is superior to
Paris Green in many respects. In
the first place, it contains such a
low percent of soluable arsenic that
il Is practically impossible to Durn
the most delicate kind Of foliage.
1t also sticks to tho foliage much
better. When applied to the cot
ton in the form of a spray use it at
the rate of two pounds of the paste,
or il you use arsenate Of powder at
the rate OF one pound to every fifty
pounds of water. You will see
from this that il must be used
stronger than Paris Green. No
lime need be used with it. Per.
hips the most practical way 10 ap-
ply the poison Is to dust 1t on. In
this case it Is preferable to use
arsenic of lead powder, undiluted,
at the rate of three pounds to each
acre of cotton. IfParlsGreen is used
it is used at the rate OF one pound of
Paris Green to the acre. The Paris
Green Is first diluted with twice It's
weight Of air slack lime or cheap
flour. Paris Green when used in
this way is especially apt to burn
the foliage when the dew is on the
plants or when there are a number
of heavy dews or showers after 1t Is
applied. With arsenic of lead there
Is no danger in this connection.
The most convenient way to dust
cotton is by means of the pole and
bag method described in circular
which | sent out from this Office
about SIX weeks ago at which time
| predicted this outbreak of the
cotton leaf worn. The pole and
bag method consists of one by three
board cut twelve to fifteen inches
longer than the distance between
the cotton rows and with a hole
bored about five inches from each
end. Cloth sackIng is attached
around the end in the edges of the
board making in effect two sacks
on the ends of board as indicated
in the sketch. When ready for
dustlng put in the poison through
the hole, weigh the outfit, dust a
given area to find out at what rate
you are applying it, and then
weigh again. The rate of applica
tion can soon be learned by regula
ting the tapping Of the pole. Re
garding cloth for sacks one running
about four yards to the pound will |
answer the purpose. Now one
man takes his apparatus goes down
between two rows of cotton aud by |
jarng the pole dusts two rows at a
time. One can 60 down between |