Soil Fumigants and Licensing for Application

Soil fumigants are pesticides that form a gas when applied to soil. Due to the toxicity of soil fumigants and the potential for gases to move from the soil to the air, soil fumigants are classified as restricted use pesticides.

Requirements for the use of soil fumigants include:
  • Soil fumigation license
  • A Fumigation Management Plan (FMP) for all soil fumigation applications
  • Mandatory Good Agricultural Practices (GAPs)
  • Notification of Application
  • Restrictions for workers re-entering treated areas
  • Buffer zones

Steps to obtaining a soil fumigation licence:

  1. Complete the Application for Pesticide Certification
  2. Write the exam
  3. Obtain general liability and pesticide drift insurance
  4. Apply for a licence

For more information on soil fumigation certification and licensing see http://www.gov.mb.ca/agriculture/crops/seasonal-reports/current-crop-topics.html#horticulture and/or contact:

Anne Kirk, Pesticide Minor Use and Regulatory, Manitoba Agriculture
Phone: (204) 745-5663 , Email: [email protected]


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Reduce Desiccant Drift to Prevent Injury to Sensitive Crops

Prepared by Vikram Bisht, MAFRI MAFRI Plant Pathologist – Horticultural Crops

Wheat and other crops are now being desiccated with glyphosate. It is important to watch out for the neighbouring crops, especially seed crops. Drift of glyphosate can affect seed performance in the next spring.

 Potatoes, for example, are very sensitive to glyphosate drift.  Field demonstration plots in Portage and Winkler sites, the drift on to potatoes early in the season showed symptoms on the leaves of young plants; but late in the season the potatoes plants are so large, that they do not show much sign of injury.  However, in the next season the seed emergence is significantly reduced or slowed.  There are reports from US and Canada, of expensive lawsuits due to injury to seed potatoes.

 Use of low drift nozzles, larger droplet size by reducing sprayer pressure, use of drift reducing adjuvants, keeping in mind the wind speed and direction at time of spray – could help reduce the injury to neighbouring non-target crops.

CROP CHATTER-Prevent Herbicide Drift Injury

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