The dispatch-news. [volume] (Lexington, S.C.) 1919-2001, 1922-07-26

ficiently profitable to, justify it. With
reference to atmospheric conditions,
the government says: "A calm ,atmos-
Dhere is the most important thing to
be considered whehn applying calcium
arsenate to cotton to control the boil
weevil-more important than dew or
other moisture on the cotton plants.
Success depends in getting. all or the
plant surface thoroughly covered with
the fine particles OF poison dust. The
dust comes out of the! machine in.
cloud and hangs in, theh air Tor some
time before settling. If the wind
blows during this time, much of it
never settles where 1t is wanted but
drifts beyond the cotton to other
crops or is dissipatcd blythe wind.
It is not always possible, of course,
TO get a perfectly calm atmosphere
at the time the dusting must be done.
Neverthel it is urged that applica-
ton be made when the atmosphere is
stillest.'' -.
We feel justified in again warning
our readers that calcium arsenate is
the only known successful boil
weevil poison, that the only method of
using calcium arsenate that can be
fecoEnmended is in the dust form; and
thatthe only way to apply this dust is
with one of the specially built calcium
arsenate busters. These can bes had
from So :on> UP :: Apparently the one
horse auster is becoming increasing
~ popular. 1t is a machine that will
handle two rows at time with very
satisfactory results and can be had for
around 500. Mr.. Coad in one Of
his most recent statements said that
the number of other wintereds boil
wcevfls in many districts where ac-
curate counts have been, made were
as plentiful on June 10 as a month
later under. former conditions. With
anything like normal conditions,' he
sets forth, this is going to mean rapid
increase in weevil damage ands will
have Pr important bearingSon the pro-
gam of calcium arsenate. :.
: It should be recalled that poison
ing should be started when from 10
70 Is per cent. of the squares have
been punctured. Many fields have al
ready been found where there. are
sufficient weevils to desrtoy practi-
eally- all squares as they are, formed.
Under such conditions - cotton vii;
never, bloom. unless the weevis are
controlled. For these reasons the au-
thorities say it will be necessary to
poison earlier this year than ever be-
fore. Under heavy early infestation
applications Of poison Should be made
as soon as the: cotton starts sqparing
freely, or about the time four or five
squares are found to the stalk. The
regular poisoning schedule should be
started at4that time and .sontiued
along the lines Of usual fecoraanenda-- S
ton. - =
When infesta ton reaches a: point
where practically all squares are
punctured the weevil begins to yearn
for new worlds to conquer and begins
his search. Up to the present time
this movement has occurred from late
in july to the last of August, depend
ing on locality. Migration will prob
ably start several weeks, earlier than
that this year. Therefore, poisoning
will not only be required at an earlier
date than usual but later than usual
on account of weevils from neigh
boring fields that have NOT been poss-
oned. ALI of this, as summarized by
the government experiment alton,
means:
Successful weevil control this year
IS going to require more effort and
more poison pei: acre than has eyer
been the case in the past. On the
other hand, wherever the land is suf-
.~.eiently fertile. to justify. such an-.ef-
Tort, there is mueh more assurance
Il profit from the operation than is
Usually the case. The increase in
the cost per acre brought about by
* Increased number. or applications
-etessary will be far more than COM
.:'snsated. Cor: by the fact that the
"eevil damage without poisoning will
.:e far greater than normal, and thus
ne, margin Of profit on; the operation
IS tremendously increased. In other
wordss,Sa heavy weevif infestation such
as we have this year means a. greater