If a field has regular rains or high humidity or both from two weeks before flowering and through flowering, then infection will likely occur.
canolaPALOOZA in Lacombe this week had many great features, including a canola-themed edition of Family Feud.
Lygus is one insect you may find in canola this week, but spraying lygus before pod stages rarely provides an economic benefit. Lygus do most of their damage at the pod stages.
Growers have lots of $5-per-acre treatment options that may or may not provide an economic return in their area or in combination with their own best practices. As growers attempt to expand their knowledge and experience about a certain product, look to share results with other growers trying the same product or ask the broader farm community through social media such as Twitter.
Keys to the spray decision are scouting and timing. The economic threshold is 20 CSPW per 10 sweeps generally across the field. If weevils are at thresholds, the time to spray is at 10-20% bloom, just as first pods reach 3/4” long.
Heat, drought, off-label herbicide applications, male sterility, insects, sulphur deficiency, boron deficiency.
Growers can use strip trials on their own farms to test how a particular practice or product performs in a local environment.
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