Al2 - Sunday, May 15, 1983 - North Shore News

GROWING DESTRUCTION. Life cycle of the gypsy
moth is shown from egg mass stage in first picture.
Caterpillars, likely to be hatching at this time, are the
threat to trees and wood products, feeding at a
voracious pace. They can be identified by the double
row of dots along thelr backs — five pairs of blue and
six pairs of red. Pictures on A1l3 start with the female
gypsy moth, who is prevented from flying by the weight
of her wings. The male of the species, on the far right,
ts what Agriculture Canada inspectors will be trapping.

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THIS SUMMER’s count

of gypsy

moths in North Vancouver shows spray-
ing is necessary, the most likely choice of
chemical by Agriculture Canada would be

carbaryl.

Manufactured under the
brand name Sevin, carbary!
is used in flea powders on
dogs and humans. It has
been linked with birth
mutations and with cancer
and is suspected of
aggravating hypertension
and diabetes.

Program manager John
Gold is sensitive about the
issue of chemicals even
being raised at this point.
The last thing he wants is a
repeat of the community
confrontation experienced
in the Kitsilano spraying of
1979 — especially before the

need for spraying has
even yet been determined.
All Agnculture Canada

knows at this point is that
last summer's survey of the
moth produced four positive
traps in North Vancouver.

And in one trap alone, in
the 3000 block Capilano
Road there were three male
moths. Program manager
John Gold says a single trap
with three moths is) com
parable to the Kitsilano
outbreak.

By CHRIS LLOYD

The Kits furore’ ended
with the government only
spraying the properties of
owners who consented.
Gold stresses this would also
be the case in North Van and
that any decision to spray at
all would be made in consul-
tation with the municipality.

But he says the fact that
the moth was beaten in Kits
amounted to the department
“lucking out" and apparently
zeroing in on the core area
of the infestation and
managing to wipe it out by
spraying properties where
they had permission to do
so.

The question of spraying
on the North Shore might be
even tougher to make —
with more at stake

For one thing, its a
heavier treed area. For
another, gypsy moths don't
just confine their destruction
to trees but can attack wood
inall forms As such. if wood
tmporang countnes learned
there was an outbreak of
gypsy moth in North Van it

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might well have major
ramifications on wood
exporting terminals such as
Lynnterm.

Gold predicts lumber
importing countnes would
impose conditions such as
thorough inspections which
would be costly for the
entire lumber industry.

Meanwhile, North Shore
residents have it within their
power to minimize the threat
of an outbreak.

Agriculture Canada has
been distributing leaflets to

homes in and near the
suspect areas, asking
residents to scour their

properties for signs of gypsy
moth egg masses.

Presence of the moth can
be detected from a matenal
which covers the egg masses
— which looks like a small.
irregularly shaped piece of
chamois leather. They may

be glued to trees, walls,
garden furniture. camping
equipment or even roof
gutters

Agticulture Canada

workers will be conducting
their own search program
around the end of June
when the first gypsy moths
emerge from thei cocoons
The government workers
will be locating thea traps in
one mile square grids

3 —
Photos submitted

centred in the areas where
they came up with positive
traps last year.

Heaviest concentration
will be around 3000 Capilano
Road, where 2,000 traps will
be set up. Other key areas
will be the 2700 block Mount
Seymour Parkway, the 1100
block Dollarton Highway
and 2200 block Panorama
Avenue.

The traps are baited with a
sex attractant scent, similar
to that put out by females of
the species, to lure male
moths. The numbers of
males trapped will be used as
the basis for determining the
extent of the moths’
presence.

By that time it will be too
late to start any eradication
program for this year.

The period of destruction
is during the caterpillar
stage. By the time they have
metamorphosized into
moths the feeding is over.
During the moth's seven-day
lifespan its only function 1s
to reproduce, with females
laying about 200 eggs each

Decision time would be
next year. when those eggs
hatch

Gypsy moths mulaply in
such numbers that they are
beyond eradication by their
natural predators, such as

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