The Hood River glacier. (Hood River, Or.) 1889-1933, 1922-07-06

complete unity of action as to the dis
position of plantations and rotation of
crops will be almost impossible to
bring about. In such a case barrier
which the weevils cannot cross would
be invaluable and solve the difficulty.
, At Gordon Head two types of barrier
, have heen tried and both have given
excellent results.
The crude oil barrier.-The first bar
rier of this type was designed by the
. owner of the farm, G. Vantreight, up
on which our experiments were con-
Quoted and in principle it is simply a
continuous. narrow, wooden trough
filed with crude oil. This barrier is
only suitable for situations that are
] level or with slight slope. Those that
we are now using are constructed as
. follows:
] The fence consists of suitable lengths
of Pinch by 10-inch lumber set on edge
and supported at the joints by posts of
Pinch by 6-inch lumber 18 inches long
to which the boards are bolted. The
upper edge of the boards has a groove
cut in it three-quarters of an inch wide
and II inches deep. The ends of each
section of trough are blocked by small
pieces of wood exactly fitting the
groove:
1.-The barrier is set two or three inches
in the ground on level land or deeper if
necessary where the land is sloping.
The groove is filled with crude oil and
the short space where the lengths are
| Joined together is smeared with little
tangle-foot to keep the weevils from
crossing.
The first step in constructing this
barrier is to plough a shallow furrow
in which to set it. Holes are then dug
to receive the posts and the ends of
each section are brought together and
bolted TO the posts. Bolts are superior
to nails for this purpose as the tend |
ency OF the lumber to draw away from |
the supports when warping occurs is
largely overcome. The bolts should be
square headed to facilitate removal
and the threads should be we'll creased
to prevent rusting. The lumber used
should be dry, as free from knots as
possible, and should receive a good
coat of tar applied hot. barrier
erected in this way will last a number
of years and may be taken apart and
re-erected around another plantation.
In 1921, the cost of such protection per
acre was as follows:
Materials and cost for one acre.
l, 583 feet of lumber 2 inches by 10
inches by inches selected common fir
grooved to order at $25 per M, $685.
IT'S feet 2 inches by inches by foot
6 inches posts, sized. at $32, S2.75
haulage, $500; 40 bolts at SC, sx41,
$500; 8 gallons tar, $5.50;2 lbs. tan ,
glefoot at 38c, SIG; 45 gallons crude i
oil, $500. Total. .S66. 81.
The construction of such barrier I
presents no difficulties on level or +
nearly level land and two handy men 3
should be able TO erect it in a couple of h
days. If properly erected and cared +
for it should last several years and so n
the cost chargeable against the indi- G
yidual crop of berries will not be at all
high. 1t needs no attention beyond =;
seeing that the oil level is maintained y
and that the tToughs do not leak. 1t is -
impossible for weevils to gain access :,
10 a plantation with barrier of this -
description around it and even though -
Veevils may crawl through the oil ~
hey never survive. On land that has ~
much slope, however, this barrier is n'
hfficult to construct owing to the "
Imount of work entalled by having to "
ut the sections in very short lengths ..
o keep them level and in such situa ~ ~
ions the tanglefoot barrier is to be "a "a
recommended. cl
The tanglefoot barrier. This is al Al
ormed of l-inch by 12-inch boards i rn
astened end to end, by nails or bolts, ~ ~
o 2-inch by 6-inch posts in a similar a. z.
way to the oil barrier. The boards are ~
unk about three inches below the soil
urface. The lumber used should be m,
ressed on one side and should be drv ~
efore being used. The parts in con Vi VI
act with the ground should receive a u u
eating of tar applied hot, and the N INe'
cards will be greatly improved by a CIV
oat OF paint which will not only help
o preserve them but will prevent alb sp
orption of tanglefoot by the wood A III lh
and of tanglefoOt is spread along the pc
pper outside edge about two inches
'ide and from one eighth to a quarter al
an inch thick. AS the surface tends eli
} dry out and lose its sickness it so
nould be scTaped occasionally with a
ire brush or paddle of wood to break DO
p and renew the surface. About once tn
fortnight will be sufficient, or as
ften as 1t is found that the tanglefoot
as been damaged by dust settling orr
pom 1T. Also in the course of the sea- on
m 1t will be necessary to entirely re- 40
owe the first band and spread a new
at in its place. Care must be taken oo
Iat all cracks in the barrier are filled, ~,
I'd we have found that the old used of
nglefoOt or a mixture of tanglefoot Az,
I'd dry earthIis an admirable material 60,
r this purpose. in
Materials and costs of tanpIefoot 90 90
IrTier in 1921. i 900 it,, inch by u -,
ehes selected common fir, S3l. so; $50
posts, 2 inches by inches by foot bo,
inches sized, at S22, $5. so; 8 gal. tar, ;to
so go bolts, I by 3, $l.40; nails, inc
90; haulage. S4.00; so ID. tangle- II
OF, duty and freight paid, S29.6O. roc
tai, S78. so. a.
The time taken to erect this barrier cor
II be much the same as for the gai
ler. Its efficiency entirely depends e
on the care taken to keep the sticky mo
nd IN good condition. Provided this cor
done IL is entirely effective in keep to
. the weevils out of a plantation. inc
e weevils are only repelled and are ma
caught on the sticky surface and fra
have found that large numbers of ass
evils can be destroyed by sinking n
ps, formed of any fiat sided tin can ,ha
It is handy, level with the surface t;o,
the soil and touching the barrier. ;tv' v.
e traps are filed with water and onr y
j oil and as the weevils have ten Tbs
ICY to follow the barrier along on mn
soil surface. large numbers fall in 10 !
are destroyed.
lime to erect Careymost be neg
en- to erect the barriers sufficiently -
ly in the spring before the weevils ira;
ne out of winter quarters. In the Vie,
mich district on Vancouver Island.
G., they may commence to appear =,
N March Is to 20, therefore a bar a
should be in place not later than ~ :
rch IS. Len
oth tomas ~ b.--;s. h.,,., 49,, :; Riv