Thursday, 19 May 2016

Weekly Update (May 18, 2016; Wk 03) - Cereal leaf beetle predictions

Cereal leaf beetle (Oulema melanopus) – Based on last week’s warm weather, our bioclimate model predicted rapid development of cereal leaf beetle (CLB) populations.

As of May 15, 2016, the CLB model indicated that oviposition is well underway, though this week’s development was slower than the previous week. Model output predicted that egg populations should be peaking this week in both Alberta and Saskatchewan and next week at Swan River  MB. Larval populations are predicted to peak in mid-June in southern Alberta and Saskatchewan and one week later at Swan River MB locations.

Predicted dates of peak emergence of CLB eggs and larvae:

The following model outputs have been updated this week and reflect the predicted stages of CLB present in fields in relation to its parasitoid, Tetrastichus julis

Fact sheets for CLB are published by the province of Alberta and by the Prairie Pest Monitoring Network. Also access the Oulema melanopus page from the new "Field crop and forage pests and their natural enemies in western Canada - Identification and management field guide".