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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…
Flea beetle
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It could be a heavy year for flea beetle feeding, especially since a lot of canola will emerge right at peak activity for the insect. High winds may force flea beetles off leaf tops and down to leaf undersides and leaf stems. This could actually make the situation worse, since it takes just a few bites on a stem to… -
Flea beetles are the most chronically damaging insect pest of canola in western Canada. Direct losses to oilseed production average 8-10% of the annual crop yield, and in outbreak years flea beetles can cause hundred of millions of dollars damage.The nominal economic threshold for flea beetles in canola crops in Canada is an average defoliation level of 25% or more… -
Scouting for flea beetles at field edges works early in the season when conditions are cool. With warmer weather, flea beetles will have moved throughout canola fields…
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In warmer temperatures, flea beetles are more mobile — so the technique of scouting only at field edges no longer applies. It will be important to scout throughout fields for……
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Flea beetle spraying was reported in many locations across the Prairies. Stem feeding was also noticed in a number of areas. Stem feeding is not a concern if small pitting……
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It is crucial that fields are scouted thoroughly and often. A heavy infestation on a stressed or thin stand can do significant damage in 24 to 72 hours. Be prepared……