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.
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).
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.
There will be a pepper weevil workshop for field producers April 16th at the University of Guelph Ridgetown Campus. Program starts at 1:00 PM and admission is free. For more information please contact Amanda Tracey at firstname.lastname@example.org or 519-738-1258.
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
Where NutrientSmart and FarmSmart in January dealt with the theory of soil management and nutrient use and management of inorganic nutrient sources, NutrientSmart 2.0 will explore the integration of organic amendments such as manures, biosolids, compost, green bin compost, and other sources into a systems approach to nutrient management planning for production in relation to soils. It will explore for both crop and livestock farmers and advisors how to source, apply, match and gain economic and environmental advantage from the use of these important and valuable sources of nutrients.
From Jenny Huynh, Stakeholder Communications and Marketing Officer, OMAFRA:
Are you interested in developing a strong business and growing your success? Sign up for free agri-food online courses and — for a limited time — free in-person workshops.
Take advantage of the courses to sharpen your competitive edge by gaining skills and knowledge in farm business practices, food safety and traceability. These courses will provide you with foundational information to:
reduce risks to your business and customers;
improve efficiencies; and
access new markets.
You can explore the options that best suit your schedule and learning style.