Canola Watch #16

July 2, 2015

JULY 2 QUIZ – FLOWERS

Quiz 2

What has damaged these flowers…?

READ MORE

NO CAUSE IDENTIFIED FOR MYSTERY SYMPTOMS

Mystery symptoms 6. Credit: Gregory Sekulic

Under various conditions the past decade, some canola fields have exhibited stunting and strange deformities in bud clusters — as demonstrated in the photo gallery in this article. The cause remains a mystery.

READ MORE

INSECT UPDATE: GRASSHOPPERS, LYGUS, CABBAGE SEEDPOD WEEVIL

grasshopper feeding small

Grasshoppers may be above thresholds in some fields. The nominal threshold for grasshoppers in canola is 8-12 per square metre, although the higher end of that range may be more appropriate in a typical canola crop. Grasshoppers are often at higher numbers at field margins, making a targeted spray possible. Scout to see where that line is.

READ MORE

HEAT AND DROUGHT CAN CAUSE FLOWER ABORTION

All parts of the Prairies had at least one day with a high of at least 28°C over the past week. Some areas were much hotter for days in a row.

Hot days (28-30°C and up) and warm nights (16°C and up) from bud to mid-flowering stages can have a devastating effect on canola yield.

READ MORE

SPRAYING A MULTI-STAGED CROP

Many canola crops have plants at multiple stages of growth. This field was reseeded due to frost, but some of the originals survived.

Crop staging comes into play for herbicide, insecticide and fungicide timing. So crops with plants at various stages — some at flowering, some barely at the bud stage, for example — present a challenge when deciding when to spray.

READ MORE

SCLEROTINIA RISK: HOW LOW IS IT?

This shows general sclerotinia stem rot incidence across Saskatchewan along with a general description of the moisture situation. There can still be pockets of higher incidence in years when most of the province is dry. Source: Saskatchewan Ministry of Agriculture

Moisture is the key risk factor for sclerotinia stem rot. Without moisture before, during and after flowering, disease severity and the return on investment from fungicide will be lower than if moisture is present all through these periods. Moisture can come as rain, dew and/or humidity above 80%.

READ MORE

10%, 20% AND 50% FLOWER

Canola at 20% flower. Source: NDSU

Sclerotinia stem rot and cabbage seedpod weevil control timing depends on flowering stage. This article will help you estimate 10%, 20% and 50% flower.

READ MORE

CANOLA RESEARCH HUB — VIDEO TUTORIAL

A for the is up and running. The video gives a quick introduction to the site and how to use it. Research is continually being added to the hub. Take some time and check out its features.

READ MORE

COMING EVENTS

International Rapeseed Congress – July 5-9, Saskatoon, SK
Crop diagnostic school — July 7-9 and 14-17, Carman, MB
Making the grade — July 28, Olds, AB
Crop diagnostic school — July 28-30, Outlook, SK
Canola Discovery Forum — October 27-28, Canmore, AB

Read more for registration links

READ MORE

HAIL AT FLOWERING

Canola is quite resilient to light hail at up to 20% flower. The crop can flower longer to compensate, and may recover with only minimal to moderate yield loss. Canola has also shown remarkable recovery from more intense hail at 20% flower. However, a crop flattened by hail is unlikely to recover. If regrowth occurs, which is possible, plants are set back so far that maturity becomes a major factor.

READ MORE


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

You can subscribe to Canola Watch and search all the articles on the Canola Watch website

contact a Canola Council of Canada agronomy specialist

Tags: , , , , , ,

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

Join our mailing list to receive important news and event updates!

Subscribe to our newsletters