Category Archives: Pest Management

Fungicide Efficacy Summary Tables for Management of Diseases in Field Tomatoes

By: Cheryl Trueman, Ridgetown Campus – University of Guelph

About these tables:

  • These tables were created using results from replicated processing tomato field trials at the Ridgetown Campus, University of Guelph. Please contact the author for more information on research methods and copies of full reports. The tables are for information only and do not guarantee successful results with the use of any product.
  • Always check the most recent version of the product label before applying any product.
  • Only products labelled for ‘control’ of the specific disease are included in each table except where noted.

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University of Guelph Cucumber Downy Mildew Results

Cheryl Trueman, Ridgetown Campus, University of Guelph
Rachel Riddle, Simcoe Research Station, Dept. of Plant Agriculture, University of Guelph
Elaine Roddy, OMAFRA

This article is an updated version of ‘2016 University of Guelph Cucumber Downy Mildew Results’ by Elaine Roddy, which first appeared May 1, 2017.

Comparison of fungicide programs
In 2016 and 2017, Cheryl Trueman compared several different cucumber downy mildew control programs in plots at the University of Guelph Ridgetown Campus.

Different product rotations included:

  • Bravo-only applied 6 times.
  • a high input strategy that focused on optimal control and resistance management: Orondis Ultra A+B; Torrent; Zampro; Orondis Ultra A+B; Torrent; Zampro.
  • a low-input strategy that focused on early control and resistance management, switching to lower-cost fungicides in the final weeks of harvest: Orondis Ultra A + B (plus Bravo); Torrent; Zampro; Bravo; Bravo; Bravo.
  • a single application of Orondis Ultra, applied early followed by the other targeted downy mildew  fungicides (Orondis Ultra A + B; Torrent ; Zampro; Torrent; Zampro; Torrent).
  • Control – no fungicides applied.

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Re-cropping after Callisto or Command?

Kristen Obeid, OMAFRA Weed Specialist – Horticulture

Callisto and Command are relatively new herbicides to various horticulture crops in Ontario.  They both cause bleaching symptoms even though Callisto is a Group 27 herbicide and Command is a Group 13.  Group 27 and Group 13 herbicides are categorized as carotenoid biosynthesis inhibitors.  Group 27 herbicides are also frequently referred to as HPPD inhibitors.  This refers to the inhibition of p-hydroxyphenyl pyruvate dioxygenase (HPPD).  The  inhibition of HPPD gives rise to bleaching symptoms on new growth.

Command
Command injury on tomato due to drift.

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OMAFRA IPM SCOUT TRAINING WORKSHOPS FOR 2018

These workshops are available for those who will be scouting horticultural crops this year.

To register, please contact OMAFRA’s Agricultural Information Contact Centre at 1-877-424-1300. Continue reading OMAFRA IPM SCOUT TRAINING WORKSHOPS FOR 2018

Notice of minor use label expansion registration – Prowl H2O herbicide for cabbage, broccoli and cauliflower

Jim Chaput, Minor Use Coordinator

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 direct seeded or transplanted cabbage, cauliflower and broccoli grown on mineral soil in Canada. Prowl® Herbicide was already labeled for use on a number of crops in Canada for control of several weeds.
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67th Annual Muck Vegetable Growers Conference

The 67th Annual Muck Vegetable Growers Conference will be held March 28-29 at the Bradford and District Memorial Community located at 125 Simcoe St., Bradford, ON. The conference is free and registration starts at 8:30. No pre-registration is required. For more details please see:  http://www.uoguelph.ca/muckcrop/muckconference.html

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Reason® 500SC Fungicide label expanded for management of downy mildew on basil and Brassica crops

Jim Chaput, Minor Use Coordinator

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Reason® 500SC Fungicide for control of downy mildew on basil and an amendment to update the label to include management of downy mildew on the new Brassica vegetable crop groups 5-13 and 4-13B in Canada. The head and stem Brassica vegetable group includes cabbage, napa cabbage, Brussels sprouts, cauliflower and broccoli and the new Brassica leafy greens crop group includes arugula, Chinese broccoli, Chinese cabbage, bok choy, collards, cress, kale, mizuna, mustard greens, etc.  Reason® Fungicide was already labeled for use on a number of crops in Canada for control of several diseases.
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