Canola Watch – June 30, 2016

June 30, 2016

SCLEROTINIA: RISK FACTORS AND SPRAY TIMING

At risk: A moist canopy and good yield potential.

If a field has regular rains or high humidity or both from two weeks before flowering and through flowering, then infection will likely occur.

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HIGHLIGHTS FROM CANOLAPALOOZA IN LACOMBE

Another view of 'Palooza Feud.

canolaPALOOZA in Lacombe this week had many great features, including a canola-themed edition of Family Feud.

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INSECT SCOUTING: WHAT MAY YOU FIND?

Lygus bugs make an appearance at canolaPALOOZA.

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.

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TRYING A NEW PRODUCT?

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.

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EARLY FLOWER IS WEEVIL TIME

Cabbage seedpod weevil. Credit: S.J.Barkley, Alberta Agriculture and Forestry

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.

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7 CAUSES FOR MISSING PODS

Missing pods due to heat blast on flowers. Photo credit: Keith Gabert

Heat, drought, off-label herbicide applications, male sterility, insects, sulphur deficiency, boron deficiency.

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ON-FARM STRIP TRIALS — TIPS

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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Canola Watch is a free, unbiased, timely and research focused weekly newsletter from the Canola Council of Canada Crop Production Team

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