A 005 - Bertha Armyworm (11-0... - Agri

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Bertha Armyworm
Bertha armyworm, Mamestra
configurata, is one of the most
important pests of canola and
flax. This cutworm belongs to a
group of insects called
“climbing cutworms”. Bertha
armyworm larvae feed on
leaves, defoliating the plants.
If leaves fall before the larvae
reach maturity, larvae will
feed on seed pods and eat
the developing seeds.
Failure to detect
infestations early in the
season may result in severe
damage and significant
financial losses for growers.
P h e r o Te c h ’ s b e r t h a
armyworm pheromone* lure
used with our high-capacity
Unitrap** is the preferred trap
for monitoring programs.
Trap catches of adult male
moths give an indication of
the risk of larval infestations.
Monitoring should be
implemented each year due
to fluctuations in bertha
armyworm populations.
Advantages of Pheromone Trapping
Interpreting Results
! Detecting the build-up of pests well before economic
damage can occur.
! Pinpointing locations of infestations.
! Ensuring correct decisions on whether control measures are
necessary.
! Selecting the most appropriate control measures.
! Optimising the timing of spraying.
! Assessing the effectiveness of direct control measures.
! If you catch 1,500 moths per trap over 6 weeks, the area is at
high risk for an outbreak.
! If you find 100 to 1,500 moths per trap, over the trapping
period, let producers in the area know and encourage them
to scout fields for larvae.
! If you have high moth catches, all producers in the area
should scout individual fields.
! Consult local extension personnel for additional information
about using pheromone traps, interpreting trap counts and
taking appropriate control measures.
Trap and Lure Installation
e
Wear disposable gloves to handle the lure as oils from your
Helpful Hints
skin lessen the effectiveness of the lure. Put one lure in the lure
holder situated under the top section of the trap. Place a strip of
Vaportape on the bottom of the trap. This tape will kill any
captured moth. The pheromone lure has a 4-6 week field life
(temperature dependent). The Vaportape will last through the
trapping season. Store unused lures in a sealed plastic bag in
the freezer until use. Keep record of when the traps were
deployed and the date and number of moths captured.
In addition to monitoring with traps, growers should check their
crops regularly for bertha armyworm larvae. This will help early
detection and minimize crop losses. Small larvae chew small
holes on the underside of the leaves. Mature larvae will
defoliate plants. Begin checking for larvae about two weeks
after peak trap catches. Check each field as larval densities
may vary from field to field.
Trap Placement and Density
Make sure you can identify target species, both larva and adult.
If uncertain, consult your local experts.
Place 2 traps per location at least
100 m (300 feet) apart just inside
the edge of the canola field.
Make sure that traps are at least
400 m (1/4 mile) away from any
light source to avoid competition
with trap attraction. Mount traps
about 1 m (3 feet) high above the
ground. If trapping in an area that
has had an outbreak in the past,
the trapping should be near a field
(within 800 m or ½ mile) where
bertha armyworm has been a
problem.
12” spike
fastened to
plywood and
inserted in 1/2”
galvanized pipe
galvanized pipe
5 ft. long
UNITRAP**
3/4” plywood
fastened to
bottom of trap
(1.5” by 4.5”)
Bertha armyworm overwinters as pupae in the soil burrowing
down about 5 to 15 cm (2 to 6 inches). Tilling fields in the fall
may help expose the pupae to winter conditions thus reducing
the overwintering success.
*Pheromones are naturally occurring chemicals that insects and other
organisms use to communicate with members of their own species.
**Is a registered trademark.
Insert pipe into soil to trap rests 1 ft. above
the canopy
Trap Maintenance
Traps should be emptied once a week. Visit the traps on the
same day each week. Replace pheromone lures every 4-6
weeks. Do not discard old lures and disposable gloves on the
ground.
When To Hang Traps
Bertha armyworm adults generally emerge between early June
and the end of July. Traps should be deployed in the field before
adult emergence. For the most accurate time to put out traps
consult your local experts.
Phero Tech Inc. certifies that this product meets and conforms to the description on the
information sheet. No expressed or implied warranty is made. Phero Tech Inc. will not
be liable for incidental, consequential or special damages resulting from the handling,
storage, or use of this product.
Come to us for:
, Trapping Products: Card Traps,Delta Traps ,Wasp Trap ,Wing Traps I & II.
, Glues
, Pheromone Lures: Codling Moth, Leafrollers, Mullein Bug, Peach Twig
Borer,Oriental Fruit Moth and more.
, Honey Bee Pheromones: For enhanced pollination and shipping queenless
worker packages.
Phero Tech Inc.
Printed in Canada
A 005 (11/21/03)
Toll Free: 800-665-0076
Sales Fax: 604-940-9402
sales@pherotech.com
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