Grasshopper

  • Grasshoppers thrive in hot, dry conditions

    Grasshopper

    The nominal threshold for grasshoppers in canola is 8 to 12 per square metre. The challenge with the nominal threshold is counting the grasshoppers. As soon as you walk into an area, grasshoppers take off and do not cooperate with your attempts to count them. So entomologists have come up with more practical scouting techniques.

    READ MORE

  • Grasshoppers thrive in hot, dry conditions

    Grasshopper

    Grasshoppers can thrive in hot weather. The nominal threshold for grasshoppers in canola is 8-12 per square meter, although the higher end of that range may be more appropriate in a typical canola crop.

    READ MORE

  • Insect update: Check to be sure

    Grasshopper

    Grasshoppers stripped this canola bare in a field near Medstead, SK. But while this looks dramatic, just a few plants were damaged and spraying was not required. Photo credit: Amanda Wuchner

    Diamondback moth larvae and grasshoppers have been reported, but so far nothing of widespread significance. The photo shows what grasshoppers can do to a canola plant, but their damage is usually isolated to small patches. Bertha armyworm adult traps are coming down with very little in the way of hotspots.

    READ MORE

  • Insect update: Grasshoppers, lygus, cabbage seedpod weevil

    Grasshopper

    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

  • Insect update: Grasshopper, diamondback, lygus, CSPW

    Grasshopper

    Grasshoppers. If populations are significant and crop feeding has begun, a spray or bait application around field edges may be enough to reduce the threat. Grasshoppers are easier to manage when they’re small — less than the third instar. Except in cases where there are extremely high populations feeding on crop along the edges, ideal […]

    READ MORE

  • Grasshopper thresholds

    Grasshopper

    grasshopper feeding small

    Grasshopper numbers are at or near thresholds in some regions of the Prairies. The nominal threshold for grasshoppers in canola is 8-12 per metre square. How you go about counting them is the challenge. As soon as you walk into an area, grasshoppers take off and do not cooperate with your attempts to count them. So entomologists have come up with a more practical scouting technique. It involves three steps…

    READ MORE

  • Insect update: Cutworms, flea beetles, CSPW, grasshoppers

    Grasshopper

    Cutworms are spotty but keep scouting. Flea beetles may need to be controlled past the 4-leaf stage in some extreme cases this year. Cabbage seedpod weevil numbers are building but only spray after first flower and only if sweep net results show them at thresholds. Hold off on early grasshopper control.

    READ MORE

  • Insect update

    Grasshopper

    Flea beetle spraying continues in Manitoba where crops are advancing slowly due to excess rain and limited warmth. Redbacked cutworms are still causing severe damage in southern Alberta. Some sprayed fields need to be reseeded.

    READ MORE

Canola Watch