The Madison journal. (Tallulah, Madison Parish, La.) 1888-current, 1919-08-23

termed the percentage of infesta
tion." The usual method of determin
ing this is to 60 to the four corner
and the center Of the cotton fielc
and examine 200 squares at each O,
the points, noting the percentage tina,
has been weevil punctured. Gener.
ally speaking, 1t Il advisable to start
poisoning when this percentage reach.
IS about 10 per cent, and to continue
often enough to keep the percentage
below rs or 80 per cent until late in
the season, when It may be allowed
to run much higher without injury TO
the crop. The whole problem Is simply
to keep the weevi1s below the degree
OF abundance, which would result IN
injury to the cotton plants. Eradi-
cation can not be accomplished and
should not be expected. After fnfes.
tatlon becomes complete, the task of
poisoning is very difficult and Door
risk.
If 1t is not possible to make definite
counts for percentage of weevil in |
jury, the best plan is to watch the
field as closely as possible for fallen :
squares. 1t is time to start poisoning
as soon as the yellow fiared squares
begin to show up in considerable unm-
'ers on the plants, and infested fallen
squares are numerous on the ground
Apply Poison Once a Week
When the field is Of any consider.
,ble size is frequently happens that
ne weevils emerging in the spring
oncentrate, more or less, on the cot.
on adjoining the woods and ditch
anks where they hibernated during
ne preceding winter. 1t is often DOS
Iole to confine the first one or two
pphcations to this more heavily in
ested area along the edge Of the
eld, and to skip the portions of the
ED more distant from the sources
in1estation. Later in the season
the weevils increase, it may be ne
'ssary to cover the entire field. In
'ail fields 1t is undoubtedly best to
ison the entire area without anv :
tempt to economic by treating
nited portion of it.
The interval between application,
Il depend on many conditions, but
is usually best to treat about once
week. Even more frequent treat
nts may be advisable in extreme
es. Where effective control has
IN secured early. interval. Of hon,. =
than a week may be all right. IT.. eat
son persists on the plants for a in,
Ok or more, but it will usually be w
no that so much new growth ia
duced every week, affordine IN. 'ei
'oned tissue for the weevils, as 70 COT
re is best to repeat the appliea. to
s at weekly intervals regardless mu
weather conditions. The effect 4
rain is of minor Importance. In stiff
; an occasional rain may greatly far,
ease the efficacy Of the treat ar
Is. II the treatment has been an. GRE,
under satisfactory conditions for,
stands "a hours without a heavy arse
e. no' require repeating I'm poss
than the usual interval. II /. sr..
y drenching rain falls within "a cher
$ after treatment. It is advisable on
'peat Immediately. farm
'lcium arsenate is effective mot a ..
against the boil weevi, but is He
as satisfactory against the
ear worm as Paris green or anv sena
chemical which has been used deve
lar against that insect. Who'll
.ro'set Men and Horses dang
unh arsehate Is not as danger lime
$ Paris green o. the men ind tn
lis working in poisoned fields of ae
should be remembered that . mixtr
n amount Of danger is aah-,a. senst
pon '.e use Of mattel
'asonsble preca saw I
to protect bot -
lssociSted n;<1u