Cabbage seedpod weevil: When to spray

Canola Council of Canada
June 16, 2016
By Canola Council of Canada
Cabbage seedpod weevils are working away on early canola crops, but bud spraying is not recommended.
Cabbage seedpod weevils are working away on early canola crops, but bud spraying is not recommended. S.J. Barkley, AAF.

June 16, 2016 - Cabbage seedpod weevils are attracted to the buds on early canola plants. While they will feed on these buds and destroy some of them, spraying is rarely recommended before 10 per cent bloom.

The goal with a spray is to stop adults from laying eggs in newly formed pods. These eggs hatch into larvae that feed on the seeds, causing the yield loss.

 

Cabbage seedpod weevils don't lay eggs until pods are at least 3/4 inches long — so aim to spray just before first pods reach that stage. This will be around 10 per cent to 20 per cent bloom.

READ MORE on spray timing. READ MORE on pea leaf weevils versus cabbage seedpod weevils.

 

 

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