Brassica Vegetables Insects Pest Management Specialty Root Vegetables

Assail 70 WP Insecticide For Control of Swede Midge on Rutabagas

J. Chaput, OMAFRA, Minor Use Coordinator, Guelph


The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion for ASSAIL 70 WP insecticide (acetamiprid) for control of swede midge on rutabagas in Canada. ASSAIL 70 WP (acetamiprid) was already labeled for management of a variety of insect pests on a range of crops in Canada.

This minor use submission was sponsored in 2006 by the Agriculture & Agri-Food Canada, Pest Management Centre (AAFC-PMC) in response to minor use priorities identified by rutabaga producers and extension personnel in Canada.


Swede midge has been a devastating new pest of Brassica crops in Canada in recent years. Management of this insect pest has been a high priority for Brassica vegetable producers and the registration of Assail insecticide will provide rutabaga producers with an effective and useful insect management and resistance management tool.


The following is provided as a general outline only. Users should consult the complete label before using Assail 70 WP insecticide.

For control of swede midge on rutabaga, apply 86 g per hectare of Assail in a minimum finished spray volume of 200 L water per ha. Begin applications when insect populations reach economic threshold levels and apply at 7 day intervals. Do not use more than 5 applications per season and do not apply less than 7 days before harvest of rutabagas.

Assail insecticide should be used in an integrated pest management program and in rotation with other management strategies. Follow all other precautions and directions for use on the Assail insecticide label.

We wish to acknowledge the personnel of Nippon Soda Co. Ltd. and DuPont Canada Inc. for their support of this registration and the personnel of the Pest Management Regulatory Agency for evaluating and approving this important pest management tool.


For copies of the new supplemental label contact Marion Paibomesai, OMAFRA, Guelph (519) 826-4963, Jim Chaput, OMAFRA, Guelph (519) 826-3539 or visit the DuPont Canada website at

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