Manitoba Disease & Insect Update – August 15th

A Manitoba Insect and Disease Update for the week of August 11-15, 2014 has been posted at: http://www.gov.mb.ca/agriculture/crops/seasonal-reports/insect-report-archive/insect-update-2014-08-15.html

Highlights include:

  • Grasshoppers continue to be a concern in some areas.
  • Lygus bugs should be scouted in canola in the late-flowering and early-podding stages.
  • Soybean aphid has been found in Manitoba, but only at very low levels.

Submitted by: John Gavloski, Entomologist & Vikram Bisht, Pathologist, MAFRD

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Manitoba Disease & Insect Update – August 8th

A Manitoba Insect and Disease Update for the week of August 4-8, 2014 has been posted at: http://www.gov.mb.ca/agriculture/crops/seasonal-reports/insect-report-archive/insect-update-2014-08-08.html.

Highlights Include:

  • Scouting for canola diseases has begun. Blackleg, root rots, white mold, aster yellows and alternaria pod blight will be surveyed.
  • Lygus Bugs in canola – The growth stage where canola has the most potential to have yield reduced by Lygus bugs is the early-podding stage.
  • In corn, scouting for Goss’s wilt and leaf blight disease will help growers understand the status in their crop. A few plants are showing common smut, which is not a serious disease.
  • Some have been asking about red mites seen on the wings of grasshoppers.
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Red mites on grasshoppers.

Submitted by: John Gavloski, Entomologist & Vikram Bisht, Pathologist, MAFRD

 

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Manitoba Insect & Disease Update – July 28 to August 1, 2014

A Manitoba Insect and Disease Update for the week of July 28-August 1, 2014 has been posted at: http://www.gov.mb.ca/agriculture/crops/seasonal-reports/insect-report-archive/insect-update-2014-08-01.html

Highlights include:

Pathology:

  • Fusarium head blight risk for wheat is moderate to low in different areas of Manitoba. Most of the wheat crops have finished flowering and thus at low risk. By end of the month, Fusarium head blight risk maps may not be needed.
Entomology:
  • Grasshoppers continue to be a concern in some fields.
  • Canola growers should be checking canola for Lygus bugs. Lygus can potentially be of concern when they feed on the pods of canola if levels are high, although feeding to flowering crops is not likely to be economical as canola has a very good ability to compensate for damage to flowers, especially when soil moisture is good. So far Lygus levels appear to be below economic levels in canola, with a few exceptions in the Eastern part of Manitoba.

Note: For those monitoring traps for bertha armyworm, the traps can be removed after you do your counts this week. We have enough weeks of data to know what the regional risks are. Overall trap counts in Manitoba were quite low this year. A map of the cumulative counts, as of July 28th, is posted in the update, and risk maps are also posted at the following MAFRD website (the July 28th map will be posted tomorrow): http://www.gov.mb.ca/agriculture/crops/insects/bertha-armyworm-forecast.html

Submitted by: John Gavloski, Entomologist & Vikram Bisht, Pathologist, MAFRD