Systemic insecticide treatment against emerald ash borer ... · SYSTEMIC INSECTICIDE TREATMENT...

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SYSTEMIC INSECTICIDE TREATMENT AGAINST EMERALD ASH BORER: ASSOCIATIONAL PROTECTION 1 Dora M. Mwangola, 2 Jennifer A. Burrington, 2 Angie K. Ambourn, 2 Mark D. Abrahamson and 1 Brian H. Aukema 1 Department of Entomology, University of Minnesota, St. Paul, MN 2 Minnesota Department of Agriculture, St. Paul, MN

Transcript of Systemic insecticide treatment against emerald ash borer ... · SYSTEMIC INSECTICIDE TREATMENT...

  • SYSTEMIC INSECTICIDE TREATMENT AGAINST

    EMERALD ASH BORER: ASSOCIATIONAL PROTECTION

    1Dora M. Mwangola, 2Jennifer A. Burrington, 2Angie K. Ambourn, 2Mark D. Abrahamson

    and 1Brian H. Aukema1Department of Entomology, University of Minnesota, St. Paul, MN

    2Minnesota Department of Agriculture, St. Paul, MN

  • INTRODUCTION

    ■ Emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an invasive

    insect accidentally introduced to North America from Asia

    ■ Attacks ash trees (Fraxinus spp.)

    ©bouldercounty.org

    Larval feeding Adult feeding

    Haack et al, 2002; Herms and McCollough, 2014

  • MANAGEMENT

    Quarantine Biological control

    Removal & replacement

    InsecticidesHerms and McCollough, 2014; Duan et al. 2017

  • HYPOTHESIS: Associational protection

    Treated tree

    • Adult ash borers feed on treated ash trees surrounding the

    untreated tree

  • HYPOTHESIS: Associational protection

    Treated tree

    • Adult ash borers feed on treated ash trees surrounding the

    untreated tree

    • The ash borers die

  • HYPOTHESIS: Associational protection

    • Adult ash borers feed on treated ash trees surrounding the

    untreated tree

    • The ash borers die

    • Untreated tree survives for a longer period of time

    Treated tree

  • Research question

    Can we detect associational protection

    one year post treatment ?

  • Previous work

    Brian Aukema

    Associate Professor,

    Dept. of Entomology, UMN

    ▪ Efficacy of different insecticides

    ▪ Controls (untreated trees) did not die

    as quickly as expected

  • Previous work

    Erin Margaret O’Brien, PhD dissertation, Ohio State University, 2017

    ▪ Associational protection

    of untreated tree in low

    EAB density area

    100 m

    Treated tree

  • Previous work

    ▪ No associational

    protection of untreated

    tree in high EAB density

    area

    100 m

    Treated tree

    Erin Margaret O’Brien, PhD dissertation, Ohio State University, 2017

  • Methodology

    12 sites spanning approx. 100 miles

    ■ 8 sites : Emamectin benzoate - Tree-äge G4

    ■ 4 sites : Azadirachtin (neem) - Azasol

    Each site : approx. 100 trees (green ash)

    50% of trees treated per site along a gradient

    ©Arborjet.com

  • © Minnesota Department of Agriculture

  • Smitley et al,2008

    CROWN RATING

    10 7 5 1

  • © Aubree Kees and Bade Turgut

  • Treated

    Untreated

  • Results

  • Associational protection has not been

    detected in my study…

  • Associational protection has not been

    detected in my study…

    ….Yet ?

  • ■ Possible explanation:

    ➢ EAB densities in the

    sites are not high

    enough… Yet!

    – Untreated trees in same

    area have relatively high

    crown ratings

  • Future work

    ■ Repeat treatment as recommended & monitor tree crown health for 2 more

    years

    ■ Effect of insecticides on ash tree phenology :

    ➢ Fall 2017 : no effect on leaf abscission date and color change

    2 years Annually

  • Implications

    Assist in amending current treatment

    regimens using systemic insecticides

    ✓ reducing insecticide use

    ✓ reducing treatment costs

    EA-Beat it

  • References Duan, J.J., Van Driesche, R.G., Bauer, L.S., Reardon, R., Gould, J. and Elkinton, J.S., 2017. The role of biocontrol of emerald ash

    borer in protecting ash regeneration after invasion. FHAAST-2017-02. Morgantown, WV: US Department of Agriculture, Forest

    Service, Forest Health Assessment and Applied Sciences Team. 10 p., pp.1-10.

    O’Brien, E. M. 2017. Conserving Ash (Fraxinus) Populations and Genetic Variation in Forests Invaded by Emerald Ash Borer

    Using Large-scale Insecticide Applications. PhD dissertation, Ohio State University.

    Haack, Robert A.; Jendak, Eduard; Houping, Liu; Marchant, Keneth R.; Petrice, Toby R.; Poland, Therese M.; Ye, Hui 2002. The

    emerald ash borer: a new exotic pest in North America. Newsletter of the Michigan Entomological Society. Vol. 47, no. 3 & 4

    (2002).:p.1-5

    Herms, D.A. and McCullough, D.G., 2014. Emerald ash borer invasion of North America: history, biology, ecology, impacts, and

    management. Annual review of entomology, 59, pp.13-30.

    Herms, D.A., McCullough, D.G., Smitley, D.R., Sadof, C.S., Williamson, R.C. and Nixon, P.L., 2014. Insecticide options for

    protecting ash trees from emerald ash borer second edition. North central IPM center bulletin, 12.

  • ACKNOWLEDGEMENTS


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