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Photographs can be a valuable diagnostic tool, but they have to be in focus, taken from various angles and come with details on field conditions and location…
Photography tips for agronomy
June 6, 2018
Insects
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Flea beetles: Why are some fields so bad in 2018?
May 30, 2018
Early-seeded and slow-growing canola crops (usually due to dry conditions) have faced more flea beetle pressure this year, particularly in Manitoba and central Alberta. Flea beetle emergence tended to occur before most canola crops had emerged, so flea beetles concentrated on the earliest fields. And because topsoil moisture levels were fairly low, these canola plants were growing very slowly. Concentrated…
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Tank mixes of herbicides and insecticides or fungicides
May 30, 2018
Combining pest control operations to save trips over the field may seem like good economic sense, but consider the following when making this decision:…
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What’s the Buff? Don’t spray sensitive areas
May 30, 2018
Buffer zones or strips come in all shapes and sizes, and are designed to protect sensitive areas. Sensitive areas include permanent vegetation to maintain good water quality (riparian areas around rivers, lakes and ponds), control erosion (shelterbelts) or provide wildlife habitat. These areas are also typically habitat for pollinators and other beneficial insects…
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Timely cutworm scouting and spray decisions
May 30, 2018
See bare patches like this? Could be cutworms. Include cutworms on the scouting checklist for the first one to three weeks after emergence. Any later and management becomes more difficult because (i) spraying a registered insecticide is useless because the cutworms have developed beyond the feeding stage, and/or (ii) reseeding options are starting to be limited…
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Canola Watch quiz – Cutworm
May 24, 2018
Test your cutworm knowledge with these four questions, including a "dry soils" angle…
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Map of the Week – wind trajectories
May 24, 2018
Of particular interest are those trajectories that, prior to their arrival in Canada, originated over northwestern and southern USA and Mexico – anywhere diamondback moth populations overwinter and adults are actively migrating…
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Quick note on spraying flea beetles in hot weather
May 24, 2018
Synthetic pyrethroids (Decis, Matador/Silencer, for examples) benefit from late-day spraying because they should be applied when temperatures are below 25°C…
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Canola Watch quiz – Flea beetle theme
May 16, 2018
Test your flea beetle knowledge with these five questions…