AgronomyCrop ProductionEuropean Corn Borers Found in Manitoba Potato Fields

European Corn Borers Found in Manitoba Potato Fields


European corn borers were trapped in 10 out of 12 sites and soon there could be borer injury in stems, the July 17 provincial potato report from Manitoba Agriculture’s Vikram Bisht says.

Aphids, but not potato aphid or green peach aphids, were trapped in all six samples received. Blackleg and stem rot are being reported from more fields, the report notes.

Potato heat units are over 300 units and close to possible early blight infection. Early blight has been seen in Winkler and Shilo, even though Spore Trapping network did not detect any early blight spores, the report says.  No late blight or early blight spores were trapped in Spore Trapping Network, late blight risk values are nearing 18.

Total rainfall is still below normal to near normal  at 50 to 100 per cent of normal.  High temperatures of above 30 C for the third week has resulted in heat stress and heat runners in many fields, the report notes.

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