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  • Archives

    •  2019 (225 articles)
      •  Dec (10 articles)
        • December 4, 2019 - Issue 30
      •  Oct (20 articles)
        • October 30, 2019 - Issue 29
        • October 9, 2019 - Issue 28
        • October 2, 2019 – Issue 27
      •  Sep (35 articles)
        • September 25, 2019 – Issue 26
        • September 18, 2019 – Issue 25
        • September 11, 2019 - Issue 24
        • September 5, 2019 - Issue 23
      •  Aug (31 articles)
        • August 28, 2019 – Issue 22
        • August 21, 2019 – Issue 21
        • August 14, 2019 – Issue 20
        • August 8, 2019 - Issue 19
      •  Jul (34 articles)
        • July 31, 2019 - Issue 18
        • August 8, 2019 - Issue 19
        • July 25, 2019 – Issue 17
        • July 17, 2019 - Issue 16
        • July 10, 2019 - Issue 15
        • July 4, 2019 – Issue 14
      •  Jun (26 articles)
        • June 27, 2019 – Issue 13
        • July 17, 2019 - Issue 16
        • July 4, 2019 – Issue 14
        • June 19, 2019 - Issue 12
        • June 13, 2019 - Issue 11
        • June 5, 2019 - Issue 10
        • Uncategorized
      •  May (33 articles)
        • July 4, 2019 – Issue 14
        • May 29, 2019 - Issue 9
        • May 22, 2019 - Issue 8
        • June 13, 2019 - Issue 11
        • June 19, 2019 - Issue 12
        • June 5, 2019 - Issue 10
        • May 15, 2019 - Issue 7
        • May 1, 2019 – Issue 5
        • December 4, 2019 - Issue 30
        • May 8, 2019 - Issue 6
      •  Apr (6 articles)
        • April 4, 2019 - Issue 4
      •  Mar (8 articles)
        • April 4, 2019 - Issue 4
        • March 1, 2019 – Issue 3
      •  Feb (12 articles)
        • April 4, 2019 - Issue 4
        • February 8, 2019 – Issue 2
        • March 1, 2019 – Issue 3
      •  Jan (10 articles)
        • January 10, 2019 - Issue 1
        • February 8, 2019 – Issue 2
    •  2018 (304 articles)
      •  Dec (7 articles)
        • December 6, 2018 – Issue 29
      •  Nov (10 articles)
        • November 7, 2018 – Issue 28
      •  Oct (11 articles)
        • November 7, 2018 – Issue 28
        • October 11, 2018 – Issue 27
        • September 26, 2018 – Issue 26
      •  Sep (46 articles)
        • September 26, 2018 – Issue 26
        • September 19, 2018 - Issue 25
        • September 12, 2018 – Issue 24
        • September 6, 2018 – Issue 23
      •  Aug (52 articles)
        • August 29, 2018 - Issue 22
        • August 22, 2018 - Issue 21
        • August 15, 2018 - Issue 20
        • August 9, 2018 – Issue 19
        • August 1, 2018 – Issue 18
      •  Jul (38 articles)
        • July 26, 2018 – Issue 17
        • July 18, 2018 – Issue 16
        • July 11, 2018 - Issue 15
        • July 5, 2018 – Issue 14
      •  Jun (43 articles)
        • June 27, 2018 – Issue 13
        • July 18, 2018 – Issue 16
        • June 20, 2018 – Issue 12
        • June 13, 2018 – Issue 11
        • June 6, 2018 – Issue 10
      •  May (54 articles)
        • May 30, 2018 - Issue 9
        • May 24, 2018 – Issue 8
        • May 16, 2018 - Issue 7
        • May 9, 2018 - Issue 6
        • May 2, 2018 - Issue 5
      •  Apr (12 articles)
        • Uncategorized
        • April 4, 2018 - Issue 4
      •  Mar (10 articles)
        • March 2, 2018 - Issue 3
      •  Feb (11 articles)
        • February 7, 2018 - Issue 2
      •  Jan (10 articles)
        • March 2, 2018 - Issue 3
        • January 17, 2018 - Issue 1
    •  2017 (255 articles)
      •  Dec (2 articles)
        • December 5, 2017 - Issue 30
      •  Nov (8 articles)
        • November 8, 2017 - Issue 29
      •  Oct (10 articles)
        • October 4, 2017 - Issue 28
      •  Sep (38 articles)
        • September 27, 2017 - Issue 27
        • September 20, 2017 - Issue 26
        • September 13, 2017 - Issue 25
        • September 7, 2017 - Issue 24
        • October 4, 2017 - Issue 28
      •  Aug (41 articles)
        • August 30, 2017 - Issue 23
        • August 23, 2017 - Issue 22
        • August 16, 2017 - Issue 21
        • August 10, 2017 - Issue 20
        • August 2, 2017 - Issue 19
      •  Jul (30 articles)
        • July 26, 2017 - Issue 18
        • July 19, 2017 - Issue 17
        • July 12, 2017 - Issue 16
        • July 6, 2017 - Issue 15
      •  Jun (29 articles)
        • June 28, 2017 - Issue 14
        • June 22, 2017 - Issue 13
        • June 14, 2017 - Issue 12
        • June 7, 2017 - Issue 11
      •  May (54 articles)
        • May 31, 2017 - Issue 10
        • May 25, 2017 - Issue 9
        • June 7, 2017 - Issue 11
        • May 17, 2017 - Issue 8
        • May 10, 2017 - Issue 7
        • May 3, 2017 - Issue 6
      •  Apr (14 articles)
        • April 26, 2017 - Issue 5
        • April 5, 2017 - Issue 4
      •  Mar (10 articles)
        • March 2, 2017 - Issue 3
      •  Feb (12 articles)
        • February 8, 2017 - Issue 2
        • Canola Digest
      •  Jan (7 articles)
        • Canola Digest
        • January 2017
        • January 13, 2017 - Issue 1
    •  2016 (268 articles)
      •  Dec (6 articles)
        • December 9, 2016 - Issue 30
      •  Nov (14 articles)
        • November 9, 2016 - Issue 29
      •  Oct (10 articles)
        • October 13, 2016 - Issue 28
        • November 9, 2016 - Issue 29
      •  Sep (24 articles)
        • September 28, 2016 - Issue 27
        • September 14, 2016 - Issue 26
        • January 13, 2017 - Issue 1
        • September 8, 2016 - Issue 25
      •  Aug (45 articles)
        • August 31, 2016 - Issue 24
        • Uncategorized
        • August 24, 2016 - Issue 23
        • August 17, 2016 - Issue 22
        • August 10, 2016 - Issue 21
        • August 4, 2016 - Issue 20
      •  Jul (31 articles)
        • July 27, 2016 - Issue 19
        • July 20, 2016 - Issue 18
        • July 13, 2016 - Issue 17
        • July 6, 2016 - Issue 16
      •  Jun (48 articles)
        • June 30, 2016 - Issue 15
        • June 23, 2016 - Issue 14
        • June 15, 2016 - Issue 13
        • June 8, 2016 - Issue 12
        • June 1, 2016 - Issue 11
      •  May (36 articles)
        • May 26, 2016 - Issue 10
        • May 18, 2016 - Issue 9
        • August 24, 2016 - Issue 23
        • May 11, 2016 - Issue 8
        • May 4, 2016 - Issue 7
      •  Apr (26 articles)
        • April 27, 2016 - Issue 6
        • April 13, 2016 - Issue 5
        • April 6, 2016 - Issue 4
      •  Mar (13 articles)
        • March 17, 2016 - Issue 3
      •  Feb (6 articles)
        • March 17, 2016 - Issue 3
        • February 3, 2016 - Issue 2
        • April 6, 2016 - Issue 4
      •  Jan (9 articles)
        • January 6, 2016 - Issue 1
        • February 3, 2016 - Issue 2
    •  2015 (240 articles)
      •  Dec (14 articles)
        • December 2, 2015 - Issue 30
        • January 6, 2016 - Issue 1
      •  Nov (12 articles)
        • November 4, 2015 - Issue 29
      •  Oct (6 articles)
        • October 7, 2015 - Issue 28
      •  Sep (23 articles)
        • October 7, 2015 - Issue 28
        • September 23, 2015 - Issue 27
        • September 16, 2015 - Issue 26
        • September 10, 2015 — Issue 25
        • September 2, 2015 - Issue 24
      •  Aug (35 articles)
        • August 26, 2015 - Issue 23
        • October 7, 2015 - Issue 28
        • September 2, 2015 - Issue 24
        • Ultimate Canola Challenge - Updates
        • August 19, 2015 - Issue 22
        • August 12, 2015 - Issue 21
        • April 6, 2016 - Issue 4
        • August 6, 2015 - Issue 20
      •  Jul (33 articles)
        • July 29, 2015 - Issue 19
        • Ultimate Canola Challenge - Updates
        • July 22, 2015 - Issue 18
        • July 15, 2015 - Issue 17
        • July 2, 2015 - Issue 16
      •  Jun (32 articles)
        • June 26, 2015 - Issue 15
        • June 17, 2015 - Issue 14
        • Ultimate Canola Challenge - Updates
        • June 10, 2015 - Issue 13
        • June 3, 2015 - Issue 12
        • August 6, 2015 - Issue 20
      •  May (26 articles)
        • June 3, 2015 - Issue 12
        • May 28, 2015 - Issue 11
        • May 21, 2015 - Issue 10
        • May 6, 2015 - Issue 8
        • June 11, 2014 - Issue 10
        • May 13, 2015 - Issue 9
        • May 15, 2013 - Issue 7
        • March 11, 2015 - Issue 4
      •  Apr (28 articles)
        • April 29, 2015 - issue 7
        • April 22, 2015 - Issue 6
        • April 2, 2015 - Issue 5
        • April 6, 2016 - Issue 4
      •  Mar (10 articles)
        • March 11, 2015 - Issue 4
        • Clubroot
      •  Feb (10 articles)
        • February 4, 2015 - Issue 3
        • Clubroot
      •  Jan (11 articles)
        • January 7, 2015 - Issue 2
        • February 4, 2015 - Issue 3
        • January 6, 2015 - Issue 1
    •  2014 (274 articles)
      •  Dec (11 articles)
        • December 10, 2014 - Issue 29
        • Harvest and Storage
        • Blackleg
        • Clubroot
      •  Nov (14 articles)
        • November 28, 2014 - Alert 3
        • November 4, 2015 - Issue 29
        • November 5, 2014 - Issue 28
        • Harvest and Storage
        • December 10, 2014 - Issue 29
      •  Oct (12 articles)
        • October 8, 2014 - Issue 27
        • Harvest and Storage
        • October 7, 2015 - Issue 28
        • Clubroot
        • October 1, 2014 - Issue 26
      •  Sep (45 articles)
        • September 24, 2014 - Issue 25
        • Harvest and Storage
        • September 10, 2015 — Issue 25
        • Blackleg
        • September 17, 2014 - Issue 24
        • Clubroot
        • September 10, 2014 - Issue 23
        • September 23, 2015 - Issue 27
        • September 8, 2014 - Alert 2
        • September 4, 2014 - Issue 22
        • October 7, 2015 - Issue 28
      •  Aug (41 articles)
        • August 27, 2014 - Issue 21
        • September 14, 2016 - Issue 26
        • September 8, 2016 - Issue 25
        • Harvest and Storage
        • August 20, 2014 - Issue 20
        • Blackleg
        • Clubroot
        • August 13, 2014 - Issue 19
        • Harvest management
        • Hail
        • August 7, 2014 - Issue 18
        • August 6, 2015 - Issue 20
      •  Jul (48 articles)
        • July 30, 2014 - Issue 17
        • July 29, 2015 - Issue 19
        • August 6, 2015 - Issue 20
        • July 23, 2014 - Issue 16
        • July 16, 2014 - Issue 15
        • Plant establishment general/other
        • July 15, 2015 - Issue 17
        • July 9, 2014 - Issue 14
        • July 3, 2014 - Issue 13
        • June 26, 2015 - Issue 15
        • August 7, 2014 - Issue 18
      •  Jun (43 articles)
        • June 25, 2014 - Issue 12
        • June 26, 2015 - Issue 15
        • Hail
        • June 18, 2014 - Issue 11
        • Clubroot
        • Flea beetle
        • Harvest and Storage
        • June 10, 2015 - Issue 13
        • May 28, 2015 - Issue 11
        • June 11, 2014 - Issue 10
        • June 4, 2014 - Issue 9
      •  May (32 articles)
        • May 28, 2014 - Issue 8
        • May 22, 2014 - Issue 7
        • June 3, 2015 - Issue 12
        • May 14, 2014 - Issue 6
        • Uncategorized
        • May 7, 2014 - Issue 5
      •  Apr (9 articles)
        • April 24, 2014 - Alert 1
        • April 3, 2014 - Issue 4
      •  Mar (4 articles)
        • March 5, 2014 - Issue 3
      •  Feb (6 articles)
        • February 4, 2014 - Issue 2
        • July 29, 2015 - Issue 19
      •  Jan (9 articles)
        • January 9, 2014 - Issue 1
        • February 3, 2016 - Issue 2
    •  2013 (258 articles)
      •  Dec (13 articles)
        • December 18, 2013 - Issue 30
        • December 11, 2013 - Issue 29
        • December 11, 2013 - CCA/CCSC exam
      •  Nov (5 articles)
        • November 6, 2013 - Issue 28
        • Clubroot
      •  Oct (7 articles)
        • October 2, 2013 - Issue 27
        • October 7, 2015 - Issue 28
      •  Sep (32 articles)
        • September 25, 2013 - Issue 26
        • Clubroot
        • Harvest and Storage
        • September 18, 2013 - Issue 25
        • September 2, 2015 - Issue 24
        • Harvest
        • September 11, 2013 - Issue 24
        • September 5, 2013 - Issue 23
        • Flea beetle
      •  Aug (39 articles)
        • August 28, 2013 - Issue 22
        • Flea beetle
        • August 21, 2013 - Issue 21
        • July 29, 2015 - Issue 19
        • August 14, 2013 - Issue 20
        • August 8, 2013 - Issue 19
      •  Jul (37 articles)
        • July 31, 2013 - Issue 18
        • Flowering
        • July 24, 2013 - Issue 17
        • July 17, 2013 - Issue 16
        • July 10, 2013 - Issue 15
        • July 2, 2015 - Issue 16
        • July 4, 2013 - Issue 14
        • July 15, 2015 - Issue 17
        • July 1, 2013 - alert 2
      •  Jun (40 articles)
        • June 26, 2013 - Issue 13
        • Clubroot
        • June 19, 2013 - Issue 12
        • Hail
        • July 24, 2013 - Issue 17
        • June 12, 2013 - Issue 11
        • June 10, 2015 - Issue 13
        • June 5, 2013 - Issue 10
        • June 3, 2013 - Alert 1
      •  May (49 articles)
        • May 29, 2013 - Issue 9
        • May 23, 2013 - Issue 8
        • May 28, 2015 - Issue 11
        • May 15, 2013 - Issue 7
        • June 5, 2013 - Issue 10
        • June 26, 2013 - Issue 13
        • Uncategorized
        • Clubroot
        • May 8, 2013 - Issue 6
        • May 1, 2013 - Issue 5
      •  Apr (9 articles)
        • April 4, 2013 - Issue 4
      •  Mar (8 articles)
        • March 6, 2013 - Issue 3
      •  Feb (9 articles)
        • Uncategorized
        • February 7, 2013 - Issue 2
        • Blackleg
      •  Jan (10 articles)
        • November 7, 2018 – Issue 28
        • January 9, 2013 - Issue 1
    •  2012 (241 articles)
      •  Dec (8 articles)
        • December 19, 2012 - Issue 34
        • Uncategorized
        • December 5, 2012 - Issue 33
      •  Nov (4 articles)
        • November 7, 2012 - Issue 32
      •  Oct (6 articles)
        • October 3, 2012 - Issue 31
      •  Sep (23 articles)
        • September 28, 2012 - Media release
        • September 26, 2012 - Issue 30
        • September 12, 2012 - Issue 29
        • September 16, 2015 - Issue 26
        • September 6, 2012 - Issue 28
      •  Aug (38 articles)
        • August 29, 2012 - Issue 27
        • August 26, 2015 - Issue 23
        • Harvest
        • August 24, 2012 - Alert 3
        • August 22, 2012 - Issue 26
        • August 15, 2012 - Issue 25
        • August 9, 2012 - Issue 24
        • August 1, 2012 - Issue 23
      •  Jul (38 articles)
        • July 25, 2012 - Issue 22
        • July 18, 2012 - Issue 21
        • Flowering
        • Harvest
        • July 11, 2012 - Issue 20
        • Hail
        • Insects leafhopper
        • Blackleg
        • July 5, 2012 - Issue 19
      •  Jun (39 articles)
        • June 27, 2012 - Issue 18
        • Hail
        • June 20, 2012 - Issue 17
        • Flea beetle
        • June 13, 2012 - Issue 16
        • Blackleg
        • June 8, 2012 - Alert 2
        • June 6, 2012 - Issue 15
        • June 12, 2013 - Issue 11
      •  May (49 articles)
        • Uncategorized
        • May 31, 2012 - Issue 14
        • Flea beetle
        • May 24, 2012 - Issue 13
        • May 16, 2012 - Issue 12
        • May 14, 2012 - Alert 1
        • May 9, 2012 - Issue 11
        • May 2, 2012 - Issue 10
        • Clubroot
      •  Apr (17 articles)
        • April 25, 2012 - Issue 9
        • Flea beetle
        • April 4, 2012 - Issue 8
        • Clubroot
      •  Mar (8 articles)
        • March 9, 2012 - Issue 7
      •  Feb (9 articles)
        • Feb. 17, 2012 - Issue 6
        • Feb. 9, 2012 — Issue 5
        • March 17, 2016 - Issue 3
      •  Jan (2 articles)
        • Uncategorized
        • Jan. 27, 2012 - Issue 3
    •  2011 (284 articles)
      •  Dec (15 articles)
        • Jan. 4, 2012 - Issue 1
        • Dec.22, 2011 - Issue 30
        • Dec.13, 2011 - Issue 29
        • Dec.8, 2011 - Issue 28
      •  Nov (8 articles)
        • Nov. 2, 2011 - Issue 27
      •  Oct (10 articles)
        • Oct. 5, 2011 — Issue 26
        • Green canola
        • Harvest
      •  Sep (26 articles)
        • Uncategorized
        • Sept. 21, 2011 - Issue 25
        • Harvest
        • Green canola
        • Sept. 14, 2011 - Issue 24
        • Sept.14, 2011 - Alert 4
        • Sept. 8, 2011 - Issue 23
        • Sept. 2, 2011 - Alert 3
      •  Aug (59 articles)
        • August 31, 2011 - Issue 22
        • Harvest
        • August 24 2011 - Issue 21
        • Hail
        • Green canola
        • August 17, 2011 Issue 20
        • August 10, 2011 - Issue 19
        • Blackleg
        • Uncategorized
        • August 4, 2011 - Issue 18
        • August 26, 2015 - Issue 23
        • September 2, 2015 - Issue 24
      •  Jul (21 articles)
        • July 20, 2011 - Issue 17
        • Harvest
        • July 13, 2011 - Issue 16
        • July 6, 2011 - Issue 15
      •  Jun (49 articles)
        • June 29, 2011 - Issue 14
        • Uncategorized
        • June 22, 2011 - Issue 13
        • Flea beetle
        • June 15, 2011 - Issue 12
        • June 3, 2015 - Issue 12
        • June 8, 2011 - Issue 11
        • June 1, 2011 - Issue 10
      •  May (55 articles)
        • May 30, 2011 - Alert 1
        • May 25, 2011 - Issue 9
        • Uncategorized
        • May 18, 2011 - Issue 8
        • Flea beetle
        • May 11, 2011 - Issue 7
        • Plant establishment general/other
        • May 4, 2011 - Issue 6
        • Harvest
        • May 2, 2012 - Issue 10
        • October 8, 2014 - Issue 27
      •  Apr (12 articles)
        • Uncategorized
        • June 30, 2016 - Issue 15
        • Apr 7 2011 - Issue 5
      •  Mar (9 articles)
        • Mar 9 2011 - Issue 4
      •  Feb (9 articles)
        • Feb 17 2011 - Alert 1
        • Feb 7 2011 - Issue 3
      •  Jan (11 articles)
        • Jan 19 2011 - Issue 2
        • Uncategorized
        • Jan 5 2011 - Issue 1
    •  2010 (156 articles)
      •  Nov (7 articles)
        • 2010 – Issue 24
      •  Oct (4 articles)
        • 2010 – Issue 23
        • 2010 – Issue 22
      •  Sep (14 articles)
        • 2010 – Issue 21
        • Harvest
        • 2010 – Alert 3
        • 2010 – Alert 2
        • 2010 - Alert 1
        • 2010 - Issue 20
        • 2010 - Issue 19
      •  Aug (28 articles)
        • 2010 - Issue 18
        • Harvest
        • 2010 - Issue 17
        • 2010 - Issue 16
        • 2010 - Issue 15
      •  Jul (25 articles)
        • 2010 - Issue 14
        • Harvest
        • 2010 - Issue 13
        • 2010 - Issue 12
        • 2010 - Issue 11
      •  Jun (44 articles)
        • 2010 - Issue 10
        • 2010 - Issue 9
        • 2010 - Issue 8
        • 2010 - Issue 7
        • 2010 - Issue 6
        • 2009 - Issue 6
        • 2010 - Issue 5
        • Harvest
      •  May (34 articles)
        • 2010 - Issue 4
        • Flea beetle
        • 2010 - Issue 3
        • 2010 - Issue 2
        • 2009 - Issue 2
        • 2010 - Issue 1
        • Plant establishment general/other
    •  2009 (210 articles)
      •  Sep (32 articles)
        • 2009 – Issue 20
        • 2009 – Issue 19
        • 2009 – Issue 18
      •  Aug (40 articles)
        • 2009 – Issue 17
        • 2009 – Issue 16
        • 2009 – Issue 15
        • 2009 – Issue 14
      •  Jul (44 articles)
        • 2009 – Issue 13
        • 2009 – Issue 12
        • 2009 – Issue 11
        • 2009 - Issue 10
        • 2009 - Issue 9
      •  Jun (65 articles)
        • 2009 - Issue 8
        • 2009 - Issue 7
        • Flea beetle
        • Plant establishment general/other
        • 2009 - Issue 6
        • 2009 - Issue 5
        • 2009 - Issue 4
        • Harvest
      •  May (29 articles)
        • 2009 - Issue 3
        • 2009 - Issue 2
        • 2009 - Issue 1
  • Issues Archive

    Use the expandable navigational menu on the left hand column to find a specific issue of Canola Watch by year, month and date.


    July 30, 2014




    Four the week

    Mature bertha armyworm. Source: Roy Ellis

    Lygus schmygus. Sweep net counts approaching thresholds have been reported in many areas across the Prairies, but high counts may not require a spray if canola is growing vigorously and has good moisture conditions.

    Low bertha. Trap counts for bertha armyworm adults are fairly low across the Prairies, except for a few hotspots in central Alberta. This suggests a minimal threat of heavy worm damage overall, but don’t let your guard down completely.

    Diamond backtrack.
    Beneficials seem to be doing a good job on diamondback moth larvae. Unless you see significant pod feeding and counts exceed 20-30 per square foot at a few random sites in the field, spraying will not likely provide an economic return.

    Why the miSing podS? Six leading factors can cause blanks up the stem. Sulphur deficiency is one of them, and could be a leading contender this year.

    READ MORE







    Map of the week

    NDVI July 30
    NDVI legend

    This map from StatsCan’s Crop Condition Assessment Program uses NDVI satellite imagery to show crop growth. This map compares growth to July 21 this year with the same period last year. Yellow indicates that growth is about the same as last year. Light brown is behind. As you can see, crop growth for most of the western Prairies is around the same pace as last year while most of the eastern Prairies is behind.

    READ MORE







    July 30 Quiz

    CabbagewormWesAnderson_opt

    Test your worm ID skills with this week’s quiz.

    READ MORE







    Lygus thresholds — Economics

    lygus dan.johnson small

    Threshold tables for lygus suggest, for example, that if canola is $12 per bushel and spray costs $8 per acre, the threshold at the early pod stage is 5 lygus adults or late instar nymphs per 10 sweeps.

    Current thinking is that 5 lygus per 10 sweeps (0.5 per sweep) is too few to warrant a spray, and that the economic threshold is likely quite a bit higher.

    READ MORE







    Bertha armyworm thresholds

    Mature bertha armyworm. Source: Roy Ellis

    Bertha armyworm is one pest that can do a lot of damage in a short time. They’re large and eat a lot. Even within an area showing low risk on provincial maps, hot spots can flare up. (Photo credit: Roy Ellis)

    READ MORE







    Diamondback moth larvae — Thresholds

    Diamondback moth larvae feeding on pods.

    Thresholds are 100-150 larvae per square metre in immature to flowering plants and 200-300 larvae per square metre (20-30 per square foot) in plants with flowers and pods. While these nominal thresholds are based on dense stands of 150-200 plants per square metre, plant population is not a major factor. Fewer plants will have more branching and more pods, so the number of pods per square foot probably won’t change much regardless of plant population.

    READ MORE







    New swede midge locations

    Swede midge larvae inside floret. Source: Julie Soroka, AAFC

    A swede midge infestation has been confirmed near Meota, Saskatchewan, well outside the Nipawin-Carrot River epicentre. Higher numbers have also been reported near Hudson Bay, Saskatchewan, indicating an eastward migration as well. But while the insect seems to be spreading in distribution, overall numbers and levels of damage are down this year across the province.

    READ MORE







    Leave required time between spraying and cutting

    spraytoswathscreenshots

    Pre-harvest interval (PHI) refers to the amount of time that must lapse (in days) after a pesticide application before the crop is cut. Cutting refers to swathing or straight combining. Each crop protection product has its own PHI, and the PHI for a specific product often vary by crop.

    READ MORE







    6 causes for missing pods

    Missing or stunted pods at the top of this plant are likely due to heat stress. The plants look fine otherwise.

    Seeing stems with lots of blanks where pods should be is often cause for alarm. There are many possible factors. Here are the top 6:

    READ MORE







    Disease diagnostics

    cw2-image-diseases-blackleg-field-lodging-severe-1-hammondd

    Seeing signs of canola disease but you don’t know what it is?

    Read this article: Disease to look for while harvest scouting.
    Watch this video: CCC pre-swath disease scouting video.
    Use the Canola Diagnostic Tool

    READ MORE




    July 23, 2014




    Four the week

    Pre-swath disease scouting

    Distinguished pests. CCC agronomists launch a new video (embedded above) this week with tips and helpful images for your pre-harvest disease scouting routine.

    Who ya gonna call? More tank mixes and more time stress create all sorts of scenarios for crop-damaging mistakes. Hopefully the two parties can figure out the problem and resolve this situation amicably. If not, a consulting agrologist might help.

    Nein-1-1. A decision to apply a rescue treatment for hail or heat requires two things: (1) Realistic expectations that an economic return may not occur and (2) acceptance that sufficient independent research on boron or any other rescue treatment hasn’t been done.

    Bloomin’ long. Canola with low plant populations will flower longer. With rain or humidity and a long time at “full flower,” is a second fungicide or a late first fungicide now worthwhile? Assess the situation and the tolerance for risk.

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    Map of the week

    Temperatures above 28C
    Temp legend

    The areas in orange and red have had the most days with maximum temperatures of 28°C or above in July. These hot days can cause higher levels of flower abortion, especially if they come in combination with warm nights. Areas in light green have had 2 to 4 days with maximum temperatures of 28°C or more, and dark green areas have had fewer than 2, which would be considered good news on the heat front for those regions.

    Thanks to Trevor Hadwen at AAFC for creating this map from their data.

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    July 23 Quiz

    Mystery question

    We have three questions on insects plus a mystery question (shown in the photo above). We don’t know what this is, and we’re hoping you might.

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    Video: Begin your pre-harvest disease watch

    Pre-swath disease scouting

    Yield-robbing levels of disease will be easy to spot in canola fields now and through to harvest. This is a great time to start your pre-harvest disease scouting. The CCC has released a new pre-swath disease scouting video available on www.canolacouncil.org on proper identification including tips and close up views of typical damage from the major diseases.

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    Tank hang ups and spraying mishaps

    Spraying mishap

    When strange patterns of damage in canola fields line up perfectly with the sprayer boom width or follow typical drift patterns, phone calls and finger pointing begin.

    Explanations can be simple: The wrong product was added to the tank, or the right product was applied but on the wrong field.

    But situations are often much more complicated — and made even more so by the wide variety of products that go through sprayer tanks. Mixing order becomes a potential problem, with unforeseen consequences if new never-used-before mixes are tried or if the proper mixing order is messed up or if products are not given time to come into suspension before the next product goes in.

    READ MORE



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