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Used to Interpret Bertha Armyworm Forecast Maps | |
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| | Potential damage from bertha armyworm may be more or less severe than suggested by the moth count data depending on weather and crop conditions. The objective of the network is to heighten the awareness of canola producers to the damage potential of bertha armyworm and not to replace field scouting.
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Cumulative # Moths |
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From |
To Larval Infestation Risk Level |
0 |
300 Low - Infestations are unlikely to be widespread, but fields should be inspected for signs of insects or damage. |
300 |
900 Uncertain - Infestations may not be widespread, but fields that were particularly attractive to egg-laying females could be infested. Check your fields. |
900 |
1200 Moderate - Canola fields should be sampled regularly for larvae and for evidence of damage. |
1200 |
1500+ High - Canola fields should be sampled frequently for larvae and for evidence of damage. |
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For more information about the content of this document, contact Scott Meers.
This document is maintained by Shelley Barkley.
This information published to the web on June 17, 2005.
Last Reviewed/Revised on September 14, 2007.
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