Understanding the Impact and Measures Needed to Address Bt Resistant Rootworm

Why be concerned about the Bt resistant rootworm populations showing up in Ontario? Dr. Jocelyn Smith, University of Guelph Ridgetown Campus stands in a field that has cross resistant rootworm.  The grower experienced more than 50% yield loss in this 2nd year silage corn field planted with a pyramid hybrid in 2020.  Jocelyn discusses the […]

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2020 Ontario Grain Corn Ear Mould and Deoxynivalenol (DON) Mycotoxin Survey

Co-authored with Albert Tenuta, Field Crop Pathologist, OMAFRA OMAFRA field crop specialists in collaboration with Grain Farmers of Ontario (GFO) and members of the Ontario Agri-Business Association (OABA) have completed the annual Ontario corn ear mould and DON mycotoxin survey. Corn ear moulds such as Gibberella and their corresponding mycotoxins occur every year in Ontario. […]

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Non-corn options for livestock producers to manage Bt-resistant corn rootworm

In fields where Bt rootworm corn hybrids have been used for more than three consecutive years, resistance among corn rootworm populations is suspected. Growers can no longer rely solely on Bt hybrids for protection against rootworm injury. The best management practice to reduce the resistant rootworm population is to rotate out of corn for at […]

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Mitigation Measures for Bt Resistant Corn Rootworm

Extensive injury by corn rootworm (CRW) to pyramid Bt rootworm (Bt-RW) hybrids was observed in several Ontario counties in 2020, suggesting that CRW populations have developed resistance to multiple Bt-RW proteins. The Canadian Corn Pest Coalition (CCPC) and OMAFRA have developed mitigation recommendations for continuous corn producers, in hopes of knocking back the resistant corn […]

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Revised October 2020 – Canadian Bt Corn Trait Tables with Events and Resistance Status

We have revised the Canadian Bt Corn Trait Tables to reflect the current potential cross resistance of corn rootworm in Ontario to all Bt-RW proteins.  Here are the latest versions: English:  Bt Corn Trait Table (October 2020) with Events and Resistance Status  French:  Tableau des caractères Bt (Octobre 2020-Français) – Évènements transgéniques et résistances For information on […]

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September 2020 Forage Report

sorghum-sudangrass after a frost

Photo: It is impossible to tell by looking at frost-damaged sorghum-sudangrass what the prussic acid levels may be. Silage Corn In fields where rootworm Bt hybrids have been used for three or more consecutive years, resistance among corn rootworm populations is suspected. Producers can no longer rely solely on Bt rootworm hybrids for protection against […]

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Getting to Know Your Knolls Part 1: Understanding and Managing High pH Knolls

Jake Munroe, Soil Management Specialist – Field Crops, OMAFRA We’ve all seen them. Hilltops. Whitecaps. High spots where the crop struggles year after year. Eroded knolls are common to Ontario agriculture and cost farmers in lost productivity each season. However, not all eroded knolls are alike. In this two-part series, we will explore knolls: how […]

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Unraveling the Mystery of Soil: Manure’s Contribution

Christine Brown, Sustainability Specialist – Field Crops, OMAFRA “A radical new way of thinking about soil has partially solved the mystery of why adding manure improves resilience, climate control, and crop yields.” – Dr. Andy Neal, Rothamsted Research. Have you ever wondered why forests can establish and thrive without being fertilized? Or, why grasslands, pastures, […]

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Managing Jointing and Non-Jointing Grasses

Christine O’Reilly, Forage and Grazing Specialist, OMAFRA Grass doesn’t just happen and not all species grow the same way. Understanding how different grass species grow enables producers to make good management decisions that maximize forage production in their hay fields and pastures. Jointing and non-jointing grasses respond differently to cutting, which directly affects productivity and […]

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AgriSuite Field Management Calculator

AgriSuite is an interactive online collection of management tools and calculators, developed by OMAFRA that you can access from your desktop or mobile device. AgriSuite assists you with key crop fertilization management decisions and how they relate to optimizing crop production and protecting the environment. AgriSuite: The Field Management Calculator helps with nutrient balancing to […]

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