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Update on Leafy Spurge Flea Beetles Degree Days (06/21/18)

Most of North Dakota has accumulated enough degree days to start scouting for leaf spurge flea beetles for biocontrol of the noxious weed leafy spurge.

Update on Leafy Spurge Flea Beetles Degree Days

Most of North Dakota has accumulated enough degree days to start scouting for leaf spurge flea beetles for biocontrol of the noxious weed leafy spurge. Begin scouting for adult flea beetles when the sunflower AGDD approaches 1,000. Flea beetles are collected between 1,200 and 1,600 AGDD using the sunflower GDD model. Use the sunflower degree day map on NDAWN and enter“2018-03-01” for planting date and select “growing degree day” for map type.

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Janet J. Knodel

Extension Entomologist

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