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.
