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Dr
Research Update
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careful use of insecticides in the
vineyard.
nitrogen and irrigation levels on
leafhopper numbers.
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flowering plants and winter host plants
It would also be helpful to provide
for Anagrus parasitoids and other
nymph numbers can be reduced as
As well, initial tests suggest leafhopper
much as 90 per cent with the use of
By Judie Steeves
A
beneficial insects, he noted. certain surfactants and fungicides.
healthy plant provided with
balanced nutrition is the first line
ongoing study into the use of
This research is included as part of the
groundcover vegetation to control
antifeedants and repellants is planned
A further investigation of such
according to Tom Lowery, an
of defense against leafhoppers,
cutworm damage to grapes.
with Usher, said Lowery.
entomologist at the Pacific Agri-food
Research Centre in Summerland.
vine cordon in spring is very effective
Yellow sticky tape applied below the leafhoppers, strive for a healthy plant,
In summary, in controlling
against leafhoppers, but it is costly and
use appropriate physical and cultural
research into the management of
Lowery was updating growers on his
difficult to apply.
controls, monitor and maintain records
and apply the most suitable insecticides
leafhoppers, such as the western grape
leafhopper,
which also reduces bunch rot, is around
Early season removal of basal leaves, only when and where required.
which was first discovered in the
Erythroneura elegantula,
70 per cent effective in controlling
Okanagan in 1998 and is more resistant
leafhoppers.
repellants and Anagrus host
Research will continue into leafhopper
relationships; and new reduced-risk
to most insecticides than the common
Virginia creeper leafhopper,
Kevin Usher and Gerry Neilsen at PARC
A collaborative study with Pat Bowen, insecticides that fit better into an
Erythroneura ziczac.
is under way to investigate the effect of
integrated pest management program
side of the valley from Penticton to the
At first, it was restricted to the east
border, however it has now been
For All Your Fencing Requirements
will be evaluated.
reported farther north and on the west
side of the valley in Kaleden, so a new
survey is needed, he said.
normally controlled by the egg
Fortunately, this leafhopper is
parasitoid
which winters in the eggs of other
Anagrus erythroneurae,
leafhoppers on roses, plums, apple and
blackberry, and in spring it uses eggs of
the mint leafhopper on garden plants
such as sage, lavender and catmint, said
Lowery.
a71DEER FENCES a71TRELLIS POST POUNDING
a71SPLIT CEDAR RAIL a71RANCH-STYLE POLE GATES
Virginia creeper leafhopper, as it has few
Anagrus daanei is not effective for the
other winter or spring hosts. There is the
a71AUTOMATIC GATE OPENERS
possibility, he said, of importing a third
species, from Washington State or from
We’ll Keep You Posted!
eastern Canada.
parasitizes eggs of both species.
Anagrus tretiakovae
Call ... FRAZER BLACKMORE
Phone: (250) 542-6082 Fax: (250) 542-0851
9050 Kalamalka Road, Vernon, BC V1B 3C3
10
on parasites that there is only very
However, it’s important when relying
British Columbia FRUIT GROWER • Fall 2009
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