Managing flatheaded borers in nursery production without insecticides

Project Type: Research and Education
Funds awarded in 2018: $284,869.00
Projected End Date: 09/30/2021
Grant Recipient: Tennessee State University
Region: Southern
State: Tennessee
Principal Investigator:
Dr. Karla Addesso
Tennessee State University
Flatheaded borers in the genus Chrysobothris are native pests of tree crops across North America. In Tennessee, they are of special concern in field grown nursery production. Females lay eggs at the base of newly transplanted trees and larvae tunnel through the cambium tissue. Larval feeding can result in culled trees due to aesthetic damage or tree death if the plant is sufficiently girdled. Current management recommendations include basal drenches of imidacloprid, which protects trees from borers for up to 3 years. This treatment program is not without concerns, both from pollinator health and consumer acceptance perspectives. Alternative management practices for borer control may include the use of cover crops and barrier products. Previous research has shown that borer management can be achieved using winter cover crops. Barrier products may also present options for borer control. Updated recommendations for Chrysobothris management and proposals for future investigations will be discussed.
Conference/Presentation Material
Karla Addesso, Tennessee State University
Jason Oliver, Tennessee State University
Axel Gonzalez, Tennessee State University
Sujan Dawadi, Tennessee State University
Paul O'Neal, Tennessee State University
Target audiences:
Educators; Researchers
Ordering info:
Karla M Addesso
Tennessee State University
Otis L. Floyd Nursery Research Center
McMinnville, TN 37110-1367
Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or SARE.