Manitoba Insect & Disease Update – Week of June 16th

A Manitoba Insect and Disease Update for the week of June 16-20, 2014 has been posted at: http://www.gov.mb.ca/agriculture/crops/seasonal-reports/insect-report-archive/2014-06-17-insect-update.html

Highlights include:

  • Cutworms continue to be an issue in some areas.
  • Flea beetle populations remain a concern in some areas, although the cool weather and advance of many canola fields to stages more tolerant to feeding has resulted in decreased damage.
  • Grasshoppers are emerging, but generally still in the first and second instar stages.

Juvenile grasshopper (left) and non-economical species of leafhopper (right) (MAFRD)

  • Alfalfa weevil larvae are starting to be noticed in some alfalfa fields.
  • Brown spot (Septoria) and bacterial leaf blight have been observed in soybeans.

Early stage of bacterial blight spots and brown spot disease on unifoliate leaves of soybean (MAFRD)

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

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