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  How to Manage Pests>Canola>

 

Insect Thresholds of Canola

Pest Threshold Reference
  flea beetle 25% of the cotyledons show severe pitting or tissue loss UI CIS 982 (1993)
cabbageseedpodweevil.jpg (2226 bytes) cabbage seedpod weevils after full bloom when 10-20% of blooms remain and 2 to 3 weevils per plant UI CIS 982 (1993)
diamondbackmoth.jpg (2997 bytes) diamondback moth 28 per square foot or 10 per plant, and the plants are under drought or other stress UI CIS 982 (1993)
redbackcutworm.jpg (4008 bytes) cutworms 3 larvae per square yard UI CIS 982 (1993)

Thresholds are not available for these pests: aphids; cabbage flea beetle; lygus bugs; loopers; armyworms.

References:  UI CIS 982 Insect pests of spring-planted canola.

Revised: August 12, 2008

 
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