There are a few changes to pest control products registered on hops in Ontario – both additions and losses. Changes are outlined in this article, and have also been summarized in a new and expanded Hops Pest Control Product List for 2021, available for download below.
Orondis Ultra now registered
The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for ORONDIS® Ultra Fungicide (oxathiapiprolin + mandipropamid) for control of downy mildew on hops in Canada. The active ingredient mandipropamid was already registered on hops in the products Revus, however oxathiapipriolin is a new active and fungicide group (49) for downy mildew control on hops. This minor use proposal was submitted by Agriculture & Agri-Food Canada, Pest Management Centre (AAFC-PMC) as a result of minor use priorities established by growers and extension personnel. ORONDIS® Ultra Fungicide is toxic to aquatic organisms. 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. Oxathiapiprolin is persistent and may carryover. It is recommended that any products containing oxathiapiprolin not be used in areas treated with this product during the previous season. For rates and other information, refer to the 2021 Pest Control Products for Ontario Hops, below.
Quintec phase out – June 30 2021
Hop growers are reminded that, as indicated in the 2020 Hops Pest Control products list, the use of the fungicide Quintec (active ingredient quinoxyfen) is being phased out on horticultural crops in Canada, including hops, as the result of a re-evaluation decision by Health Canada’s Pest Management Regulatory Agency. Quintec was registered for control of hop powdery mildew. The last date of use for Quintec on hops is June 30, 2021. Early powdery mildew infections are appearing in some Ontario hopyards. Growers who had planned to use Quintec for powdery mildew control this year have only a few days left, otherwise they will have to select from the remaining products registered in Ontario.
Admire re-evaluation complete
The Pest Management Regulatory Agency released their final re-evaluation decision on imidacloprid insecticides (Admire) in May 2021. While use of this product on several crops is being cancelled, the registration on hops has been determined to be acceptable and will be retained. Hop growers will continue to be able to use Admire for control of aphids.
New Ontario Pest Control Products List for Hops available
A new 2021 pest control products list for hops has been updated to reflect the changes described above. In addition to product updates, new features have been added for 2021, including:
- efficacy of insecticides and miticides on major hops pests
- main characteristics of miticides registered on hops
- efficacy of fungicides against hop downy mildew
- impact of insecticides, miticides and fungicides on beneficial insects
- calculating banded applications of herbicides
Note that pesticide registrations are always changing – as we become aware of changes in the status of existing or new crops, we will try to update that information on this blog. However, as always, this list does not replace the need for growers to thoroughly read product labels prior to application. For full labels, growers can visit the Pest Management Regulatory Agency’s label databaseThe full list can be found by clicking on the link below.