By Jim Chaput, Minor Use Coordinator, OMAFRA

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use registration for ASSURE® II (quizalofop-p-ethyl) Herbicide for control of labeled weeds on crop group 9, cucurbit vegetables in Canada. Crop group 9, cucurbit vegetables includes cucumbers, melons, squash, pumpkins and gourds. ASSURE® was already labeled for use on a wide range of Canadian major, specialty and minor crops.

This minor use submission was originally sponsored in early 2001 by Dr. Darren Robinson in response to minor use priorities identified by producers and extension personnel. Data deficiencies were identified in late 2001 and the project was re-prioritized and taken on by Agriculture & Agri-Food Canada, Pest Management Centre in 2003.

Weed management has been a priority for producers of field cucurbits and the registration of Assure® II herbicide will provide producers with an effective and useful weed management tool.

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

ASSURE® II herbicide can be used for control of labeled grassy weeds on cucurbits at a rate of 0.38 – 0.75 L product per hectare in combination with a recommended surfactant (i.e. Merge or Sure-Mix) at a rate of 5 L per 1000 L of spray volume (0.5% v/v). Make one application per year when the crop is at the 2 – 6 leaf stage. Use ASSURE® in a minimum of 100 L water per hectare with a 30 day pre-harvest interval.

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

ASSURE® II 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 Jim Chaput, OMAFRA, Guelph (519) 826-3539, Kristen Callow, OMAFRA, Harrow (519) 738-1232 or visit http://www2.dupont.com/Agriculture/en_CA

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