Alliums Weed Management

Minor Use Label Expansion Granted for Frontier Max Herbicide for Management of Weeds on Green Onions

J. Chaput, OMAFRA, Minor Use Coordinator,Guelph

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion for Frontier Max herbicide for the reduced competition of redroot pigweed and suppression of yellow nutsedge on green onions grown in muck soils and for control of pigweed and black nightshade on green onions grown in mineral soils in Canada. Frontier Max was already labeled for management of weeds on corn, soybeans, dry beans, peanuts, dry bulb onions, cabbage and grapes in Canada.

This minor use project sponsored by Agriculture & Agri-Food Canada, Pest Management Centre (AAFC-PMC) was submitted in 2007 (muck soil) and 2009 (mineral soil) in response to minor use priorities identified by producers and extension personnel in Canada.

This new registration will provide green onion growers with a much needed weed management tool to control one of their most challenging problems.

The following is provided as a general outline only. Users should consult the complete label before using Frontier Max herbicide.

Frontier Max herbicide can be applied as a single application to green onions at the loop stage and before weed emergence. Apply at a rate of 963 mL product per ha on mineral soil and at a rate of 1.29 L product per ha on muck soil. Applications made prior to the loop stage of green onion may result in significant injury. Do not apply within 30 days of harvest of green onions.

Frontier Max herbicide should be used in an integrated weed management program and in rotation with other management strategies. Follow all other precautions and directions for use on the Frontier Max herbicide label.

We wish to acknowledge the personnel of BASF 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 Kristen Callow, OMAFRA, Ridgetown (519) 674-1335, Jim Chaput, OMAFRA, Guelph (519) 826-3539 or visit the BASF Canada website

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