Corn: Western Bean Cutworm
(Striacosta albicosta)
Pub 812: Field Crop
Protection Guide > Chapter
1: Corn > Western Bean Cutworm
Field Crop Protection Guide 2011-2012, Order
2011-2012 publication
Table of Contents
- Integrated Pest Management Options
- Transgenic Corn
- Agrisure Viptera 3110, Agrisure Viptera 3111, Genuity
SmartStax, Herculex I, Herculex XTRA, SmartStax
- Foliar Treatment
- cyhalothrin-lambda - Matador 120 E
- deltamethrin - Decis 5.0 EC
- Related links...
Integrated Pest Management Options
Transgenic Corn
Plant the appropriate refuge for the Bt corn trait used and follow
all insect resistance management strategies mandated by the Canadian
Food Inspection Agency.
For more information regarding Bt corn and/or refuge options, see
the Canadian Corn Pest Coalition website, found at www.cornpest.ca
| Active ingredient |
|
| Trade name |
Agrisure Viptera 3110, Agrisure Viptera 3111,
Genuity SmartStax, Herculex I, Herculex XTRA, SmartStax |
| Rate (product) |
See Table 9-4, Transgenic Crops Expressing
Insecticidal or Fungicidal Traits, on page 119, for Bt corn
options. |
| Comments |
Bt corn hybrids containing Vip3A provide full
control. Bt corn hybrids containing Cry1F provide some control.
Some ear feeding may still occur and could result in ear rot
(mycotoxin) development. YieldGard Bt corn varieties (Cry 1Ab)
do not control westerm bean cutworm. |
Foliar Treatment
Use pheromone traps to monitor for pest presence and peak flight.
Focus scouting efforts on the top three-to-four leaves of the plant.
Look for egg masses and young larvae. Eggs hatch one or two days
after turning purple. Spray is warranted if 5% of the plants have
eggs or small larvae. Spray is only effective on small larvae, prior
to them entering the ear. Additional impact on quality can be expected
from ear rots and secondary pests that may enter and feed on the
damaged ears.
Additional information on pest status and management recommendations
is provided at the Ontario WBC Trap Network:
www.cornpest.ca/default/index.cfm/wbc-trap-network/
| Active ingredient |
cyhalothrin-lambda |
| Trade name |
Matador 120 E |
| Rate per hectare (product) |
83-187 mL per ha |
| Rate per acre (product) |
34-76 mL per ac |
| PHI* |
14 (silage) 21(field and seed) |
| Comments |
Ground and aerial application. For best results, apply in
early morning, before temperatures rise, or during the evening.
Use 100-200 L water/ha for ground application, 10-40 L water/ha
are aerial application. Spray no later than 10 days after egg
hatch. Maximum 3 applications/yr. Do not apply more than 2 applications
of 83 mL/ha by air. 24-hr re-entry period. |
| Active ingredient |
deltamethrin |
| Trade name |
Decis 5.0 EC |
| Rate per hectare (product) |
250-300 mL per ha |
| Rate per acre (product) |
100-120 mL per ac |
| PHI* |
1 |
| Comments |
Ground application only. Apply when egg masses begin to hatch.
Use at least 240 L water/ha. Maximum 3 applications/yr. Do not
feed silage or stubble to dairy cattle. 12-hr re-entry period. |
Related links...
