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As predicted by moth traps, the Peace region has fields at thresholds. Beyond there, a few field here and there across the Prairies have been sprayed but the worm is not a problem on most fields…
Diamondback moth
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The most damaging of the 'green' worms is the bertha armyworm, which can be green, brown or black… -
The three most common pod munchers are bertha armyworm, diamondback moth larvae and lygus bugs. Hot spots can sometimes be isolated to specific fields, so check each field. Before spraying, make sure insects counts are at or above economic thresholds. Applications made when insect numbers are below thresholds will not provide a positive return on investment and can do unnecessary… -
Diamondback moth larvae are at noticeable levels in many canola fields in the Eastern and southern Interlake areas of Manitoba. But levels are generally below the economic threshold… -
Insect trap counts are generally low across the Prairies, but bertha counts keep rising. Here are the latest provincial survey results…
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Of particular interest are those trajectories that, prior to their arrival in Canada, originated over northwestern and southern USA and Mexico – anywhere diamondback moth populations overwinter and adults are actively migrating… -
Test your diamondback management skills with these four questions…
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Diamondback moth larvae have been found in canola fields across the Prairies this year. Of those fields with the larvae, counts in many (perhaps most) are below and often well below thresholds. Some fields are at thresholds. Some fields seem to be well above thresholds. The key is to the check each field. Diamondback larvae can vary in number from… -
Diamondback moth larvae have been found in many fields this year. In most cases counts have been well below economic thresholds, but keep looking just in case. Some fields are at thresholds and a few have been sprayed…
