Canola Watch #23

August 26, 2015

RESIDUE MANAGEMENT STARTS IN THE FALL

Adjust vane angles to make a big improvement in spread pattern.

Good residue management in the fall will help enhance drill performance, allowing for increased seed survival and an overall better field uniformity in the spring. Changing the angle of vanes on the back of the chopper will help with the width and uniformity of residue spread.

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BIN PREP: STORAGE INSECTS AND CANOLA

Canola rarely has an issue with storage insects. Primary stored product insects such as rusty grain beetle, red flour beetle and saw-toothed grain beetle can occasionally be found in stored canola if cereal grain or weed seeds are mixed in with the canola. Mites can carry mold spores that can build up in warm and moist canola, contributing to heating risk. Canola that goes into a clean bin will not usually encounter a problem with stored grain insects.

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TOP 10 SITUATIONS THAT INCREASE STRAIGHT CUT RISK

Many growers who have tried straight combining canola often see no clear advantage or disadvantage when it comes to yield. The value of eliminating the swathing step is enough for many, even if it means an added step to apply a harvest aid such as glyphosate, Heat or Reglone. This article looks at situations where swathing may still have an advantage over straight combining.

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WEED ESCAPES AND FALL WEED MANAGEMENT

While swathing or straight combining, keep an eye out for weed escapes. Unless they are an obvious sprayer miss or are weeds not well controlled under the herbicides used on the field, they could be herbicide resistant weed patches.

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FLEA BEETLES: STRIPED DOWN IN THE CANOPY

Some growers are reporting high numbers of adult flea beetles. Adults emerge from pupae in late July and August and overwinter to feed on young canola seedlings the following spring. These same adults do feed now, but Julie Soroka and Larry Grenkow (Can. J. Plant Sci. 2012: 97-107) found that flea beetle feeding on canola in late-summer is rarely an economic concern.

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FROST: TAKE PATIENT APPROACH TO SWATHING

Moderate frost damage can cause white speckling on pods, but pods remain intact and pliable and seed remains green and turgid. Watch closely but the best move may be to let this crop mature further before swathing.

Usually the best response to a light frost is to leave the crop standing to mature fully and continue to clear green.

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REGISTER FOR CANOLA DISCOVERY FORUM

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On behalf of Curtis Rempel, Canola Council of Canada vice president crop production and innovation, please join us for the 2015 Canola Discovery Forum October 27-29 in Canmore Alberta.

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SWATH TIMING FOR HIGHER YIELD

The optimal swath timing for canola yield and quality is when 60% of seeds on the main stem are showing some colour change. Seed colour change (SCC) is considered any amount of yellow or brown on the seed. Thisbecause side branches have longer to fill and average seed size for the whole plant is larger.

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DISEASES TO LOOK FOR WHILE HARVEST SCOUTING

Pre-harvest is a good time to scout for disease severity. The photo above shows severe sclerotinia infection. This article includes sclerotinia and various other diseases to look for.

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DOES STRAIGHT CUT CANOLA REQUIRE A DRY DOWN PRODUCT?

Herbicides can be used to desiccate or dry down green weeds or crop to facilitate straight combining. Here are the choices and how to use them.

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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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