Canola Watch – July 27, 2016

July 28, 2016

CHECK SUSPICIOUS WEEDS FOR HERBICIDE RESISTANCE

Kochia stands above the canola canopy. You might want to check them for glyphosate resistance. Source: Ian Epp

Surviving weeds are growing strong and some of them — like kochia and wild oats — start to look really obvious by this time of year.

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SCOUTING THOSE SICKLY PATCHES

Patches that seem to be maturing early while the rest of the crop is still green do warrant closer inspection. With all the rainfall in some areas, die-off due to excess moisture could be the prime suspect — but check anyway. It could be disease.

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STRONG GROWTH PLUS WIND AND POUNDING RAIN = LODGING

Lodged canola. This could still spring back up by harvest time. Credit: Warren Ward

If it does not straighten up, the result can be higher levels of sclerotinia stem rot and harvest challenges.

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HARVEST PLANNING: SWATH TIMING AND STRAIGHT CUTTING

Seeds in this pod would be counted as colour changed.

Some of the earliest canola fields will show seed colour change over the next two weeks. For those growers, we provide this short primer on swath timing and straight combining.

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WHY SO FEW INSECTS THIS YEAR?

Pod-eating insects — including bertha armyworm, lygus and diamondback moth larvae — are at low levels in general in 2016. The biggest factors regulating insect populations are (1) weather, (2) natural enemies and (3) competing food sources. Each is working in favour of lower insect pest pressure this year.

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CURLED PODS ARE USUALLY THRIPS DAMAGE

Western flower thrips. Credit: Olds College

Three thrips species will feed on canola in Canada and only one — western flower thrips, (Frankliniella occidentalis) — causes pod curling.

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7 CAUSES FOR MISSING PODS

As canola starts to move from flowering and into pod formation, growers will often notice blanks up the raceme where pods did not form. Here are 7 possible reasons: Heat. Hot days (28-30°C and up) and warm nights (16°C and up) from bud to mid-flowering stages can have a significant effect on canola yield. Cool […]

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SCLEROTINIA: LATE OR SECOND APPLICATIONS

Fungicide applied late in the window can provide valuable protection from sclerotinia stem rot if flowering is extended or if conditions become more conducive to disease.

Heavy rains can increase the sclerotinia stem rot risk but they also make fields too wet for ground sprayers. This can delay timely applications, especially because demand for aerial applicators can make for long wait times. Here are scenarios that may help you work through this situation….

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CROP TOURS AND OTHER COMING EVENTS

Upcoming canola events and tours…

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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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Upcoming Events

Canola Council webinar: What growers should know about trade with China

Please join us this Thursday for a webinar presentation from Jim Everson, Canola Council president, that will provide information to growers on trade with China and address questions and concerns.
Apr 18

canolaPALOOZA

The agronomy event of the summer!
Jun 26
Lacombe, Alberta

Alberta Combine College

Optimize harvest and boost your farm’s profitability!
Jul 10
Lethbridge, Alberta
SRED Tax Credits Alberta Canola
  • Know Your Grade for Canola

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