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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…
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Warm soil temperatures and decent soil moisture in most regions will mean rapid emergence. Seed put in the ground today could be up in seven to 10 days. (The graph below shows the connection between soil temperature and faster more even emergence.) Frost damage risk for these early crops is higher, especially if the plants……
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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 in case additional control measures are required. The economic threshold for flea beetle control is when 25% or more of the cotyledons are damaged. However,……
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