Herbicides Post-Harvest Weed Management

Rutabaga Producers Receive Minor Use Registration for MUSTER Herbicide for control of wild mustard

J. Chaput, OMAFRA, Minor Use Coordinator, Guelph

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use registration for MUSTER® Toss-n-Go (ethametsulfuron-methyl) Herbicide for control of wild mustard on Laurentian rutabaga in Canada. MUSTER® was already labeled in Canada for control of weeds on canola, mustard and sunflowers.

Until now this was the oldest, active minor use label expansion project in Canada. Originally submitted by Dr. Peter Sikkema, Ridgetown College in 1995, OMAFRA, SWORGA and the University of Guelph undertook the completion of both residue and metabolism studies and submitted these to PMRA. Data deficiencies were identified in 2002 and despite a concerted effort to address them with surrogate canola data the project stalled. The project was then re-prioritized at the national level and taken on by the AAFC-PMC minor use program in 2005. It has taken another 7 years to secure this registration; the patience and perseverance of all stakeholders is acknowledged and appreciated.

The following is provided as an abbreviated, general outline only. Users should consult the complete label before using Muster® herbicide.

MUSTER® herbicide can be used for control of wild mustard on Laurentian rutabagas at a rate of 15 grams product per hectare in combination with a non-ionic surfactant (i.e. Ag-Surf, Agral 90, Citowett) at a rate of 2 L per 1000 L of spray volume or with a recommended adjuvant (i.e. Sure-Mix) at 5 L per 1000 L of spray volume.

MUSTER® herbicide can be applied post-emergent to Laurentian rutabaga and from the cotyledon to 6-leaf stage of wild mustard. Use MUSTER® in a minimum of 100 L water per hectare with a 45 day pre-harvest interval. Do not apply more than 1 application per year.

Follow all other precautions and directions for use on the MUSTER® Herbicide label carefully.

MUSTER® Herbicide should be used in an integrated weed management program and in rotation with other management strategies to adequately manage resistance.

We wish to acknowledge the personnel E. I. du Pont Canada Co. 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 minor use label contact Marion Paibomesai, OMAFRA Vegetable Specialist, Guelph (519) 826-4963, Kristen Callow, OMAFRA, Harrow (519) 738-1232 or visit the DuPont website.

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