ISSUE 15    August 11, 2005


The Department has received several calls recently from canola growers expressing concern that the wet conditions in some parts of the state will prevent them from entering their fields with swathers. To address these concerns the ND Department of Ag has issued a Section 18 crisis declaration allowing use of Reglone Desiccant (EPA Reg. No. 100-1061, active ingredient diquat) on canola as a preharvest desiccant and harvest aid. A press release from the Department has been issued.

Users are reminded that they are bound by all directions, restrictions, and precautions in both the exemption use directions and the full Reglone Desiccant product label. Users must also have a copy of the exemption use directions in their possession during application. The crisis exemption use directions have been posted on both the Department of Agriculture Section 18 page and the NDSU Extension Pesticide Program page. 

The exemption allows Reglone Desiccant to be applied at 24 to 30 fl oz/A (0.38 to 0.47 lb ai/A) by ground or air. The product must be applied in a minimum spray volume of 20 gal./A by ground and 5 gal./A by air. A 7-day preharvest interval (PHI) must be observed. Use is restricted to when canola is at the 60-75% seed turn (green to brown) stage. Use is also restricted to Argentine varieties of canola.

To minimize seed loss and to maintain seed quality, users are urged to commence harvest as soon as seed moisture reaches the level for normal harvest. The use directions also contain a recommendation that growers combine no later than 14 days after application of diquat in order to avoid excess pod shattering and seed loss.

Please note that we are limited to 15 days of use under a Section 18 crisis exemption unless we submit a specific exemption request. Therefore, this exemption expires on August 19, 2005. Brian Jenks and Kent McKay from the NDSU Minot Experiment Station are working to finalize a specific exemption request document. Once the specific exemption request to EPA is submitted the new exemption use directions will be submitted extending the expiration date.

Richard Zollinger
NDSU Extension Weed Specialist

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