J. Chaput, OMAFRA, Minor Use Coordinator, Guelph
The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Prowl® H2O Herbicide for control of labeled weeds on garlic and dry bulb shallots in Canada and on transplanted leeks grown on muck soil in eastern Canada and British Columbia. Prowl® H2O Herbicide was already labeled for use on a number of crops in Canada for control of several weeds.
These minor use projects were submitted by Agriculture & Agri-Food Canada (AAFC-PMC) as a result of minor use priorities established by growers and extension personnel.
The following is provided as an abbreviated, general outline only. Users should be making weed management decisions within a robust integrated weed management program and should consult the complete label before using Prowl® H2O Herbicide.
| Crop(s) | Target | Rate (L/ha) | Application Information | PHI (days) |
| Shallots and garlic, mineral soil, EASTERN Canada | Labeled weeds | 2.2-3.3 | Maximum of 2 applications per year for shallots. For shallots, the interval between the two applications must be at least 2-6 true-leaf stage. Maximum 1 application per year for garlic. For garlic, apply after the crop has emerged, up to the 4 true-leaf stage. | 45 |
| Shallots and garlic, mineral soil, WESTERN Canada | Labeled weeds | 2.42 | One application per year for shallots and garlic. For shallots, apply at the loop to 2 true-leaf stage. For garlic, apply after the crop has emerged, up to the 4 true-leaf stage. | 45 |
| Shallots and garlic, MUCK soil | Labeled weeds | 6.6 | Apply at the loop and 2-true-leaf stage of shallots. For garlic, apply after the crop has emerged, up to the 4-true-leaf stage. Maximum of two applications per year (minimum 3 weeks interval between applications) | 45 |
| Transplanted leeks on muck soil EASTERN Canada and BC | Labeled weeds | 6.6 | Apply one application after transplanting leeks. | 30 |
Prowl® H2O Herbicide is toxic to aquatic organisms and non-target terrestrial plants. Do not apply this product or allow drift to other crops or non-target areas. Do not contaminate off-target areas or aquatic habitats when spraying or when cleaning and rinsing spray equipment or containers. Do not apply Prowl® H2O Herbicide more than once in two consecutive years.
Follow all other precautions, restrictions and directions for use on the Prowl® H2O Herbicide label carefully.
For a copy of the new minor use label contact your local crop specialist, regional supply outlet or visit the PMRA label site: https://www.canada.ca/en/health-canada/services/consumer-product-safety/pesticides-pest-management/registrants-applicants/tools/pesticide-label-search.html
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