Skip to main content
Entomology 2021 Main banner
Icon Legend
This session is not in your schedule.
This session is in your schedule. Click again to remove it.
Presentation Icons
In-Person
In-Person
Livestream
Livestream
On-Demand
On-Demand
Student Competition
Student Competition
Video Chat
Video Chat
Ticketed Event
Ticketed Event
Poster Icons
Student Competition
Student Competition
In-Person
In-Person
Poster
Poster
On-Demand
On-Demand
Back
Video Q&A ViewAttendees 1

Plant-Insect Ecosystems

Student Competition 10-Minute Paper

Grad P-IE: Invasive Species, Vectors, and IPM On-Demand Presentations

Insecticide resistance bioassay of insecticide seed treatments against Phyllotreta flea beetles (Coleoptera: Chrysomelidae) in canola of North Dakota

On-Demand
Student Competition On-Demand

    Presenting Author(s)

  • Lesley Lubenow

    East District Director
    North Dakota State University Extension Service
    Langdon, North Dakota

    • Co-Author(s)

  • Janet J. Knodel

    Professor & Extension Entomologist
    North Dakota State University
    Fargo, North Dakota

  • PB

    Patrick Beauzay

    Research Specialist, ND State IPM Coordinator
    North Dakota State University
    Fargo, North Dakota

  • Veronica Calles Torrez

    Post-Doctoral Research Scientist
    North Dakota State University
    Fargo, North Dakota

  • TP

    Travis Prochaska

    North Dakota State University
    Minot, North Dakota

  • RB

    Ryan Buetow

    North Dakota State University Extension
    Dickinson, North Dakota

  • DW

    Don C. Weber

    USDA-ARS
    Beltsville, Maryland

  • AK

    Ashot Khrimian

    USDA-ARS
    Beltsville, Maryland

 
North Dakota is the leading canola producing state in the United States. Neonicotinoid insecticide seed treatment have been used management of Phyllotreta flea beetles over the past 17 years by the majority of growers (95%). The overwintering generation of Phyllotreta striolata Fabricius and P. cruciferae Goeze were collected from northeast (Langdon) and P. cruciferae from the north central (Minot) and southwest (Dickinson) areas of North Dakota. Wild P. striolata were live trapped using an aggregation lure and wild P. cruciferae using a kairomone. Canola seed was treated with three insecticide treatments: thiamethoxam (400 g/100 kg seed, neonicotinoid), clothianidin (200.8 g/100 kg seed, neonicotinoid), and cyantraniliprole (1000 g/100 kg seed, diamide). In the greenhouse, 10 flea beetles were placed in a bioassay cup containing five canola plants at either 7 and 14 days after planting. Mortality and feeding injury ratings were assessed at three and seven days after initial infestation.  At Langdon, P. striolata, had significantly lower mortality and higher injury ratings than P. cruciferae for thiamethoxam, clothianidin and cyantraniliprole seed treatments. For P. cruciferae at all locations, all insecticide seed treatments had greater mortality and lower injury ratings than the untreated check. Cyantraniliprole mortality tended to equate to thiamethoxam and clothianidin by Day 7.  Due to the reliance and continuous use of neonicotinoid insecticide seed treatments, Phyllotreta flea beetles are developing increased tolerance to the neonicotinoid insecticide seed treatments tested, especially for P. striolata.