Suppression and Eradication Programs

Eradication playbook

The Insect Pest Prevention and Management Program created an Eradication Playbook​ to document the diversity of activities that have gone into creating successful eradication projects for Asian gypsy moths and Japanese beetles in Oregon. It also serves as a quick reference field guide for eradication projects.​

Japanese beetle

2018 Japanese beetle eradication treatment is complete

Primary treatment for Japanese beetle in Washington and Douglas counties, as well as Portland International Airport, has been completed for 2018. Note: Treatments for properties of residents that requested medical exemptions will occur later this summer. 

The Japanese beetle eradication project is a proposed five-year project and expected to continue through 2021, but the areas receiving treatment are likely to change. See the Japanese beetle response plan for more information.

Yard debris quarantine

To comply with the quarantine to prevent the spread of both Japanese beetle adults and larvae, all residents, landscapers, and waste managers that work in the yard debris quarantine area must follow the steps below. 

Residential yard debris including grass clippings, plants with soil, and sod must be contained and delivered to Northwest Landscape Services (NLS) (details below). Compost and transfer facilities ARE NOT ALLOWED to accept yard debris from the quarantine area in order to prevent the spread of Japanese beetle. See the online map of the quarantine boundary — the quarantine area is the area outlined in ORANGE on the map. 

If possible, keep yard debris at the property or use a standard curbside yard debris bin.
If yard debris must be removed from the property, bag and cover the load and take it directly to:
  • Northwest Landscape Services (NLS)
    1800 NW Cornelius Pass Rd, Hillsboro, OR
    (503) 486-5154. 
  • Summer Hours of Operation: Monday - Friday: 6am to 6pm; Saturday by appointment; Closed Sundays and Holidays.
  • This yard debris drop-off site is ONLY available to quarantine residents and their landscapers.
Quarantined yard debris and material includes:
  • Grass clippings
  • Plants with roots or soil attached
  • Sod or removed turfgrass
  • Growing media (potting soil from raised beds or potted plants, NOT fill dirt)
  • Compost
  • Bulbs or tubers of ornamental plants
  • Mixed loads containing the above material (avoid mixed loads containing garbage and non-plant material)
Yard debris that does not need to be taken to Northwest Landscape Services includes:  
  • Tree limbs or prunings (no roots attached)
  • Shrubs prunings or clippings (no roots attached)
  • Fill dirt
  • Lumber or fence boards with dirt attached
  • Non-plant materials such as lumber, cement, gravel, and fencing
  • Materials not on the list of quarantined debris or materials​
2018 Japanese beetle ​detections

Japanese beetle traps are currently being deployed for the 2018 adult beetle flight period. We expect to start seeing adult beetles begin activity in mid-June of 2018. 

In and around the 2017 treatment area, the total catch was an unprecedented 23,000 beetles. Roughly 97% of the beetles detected came from traps within the treatment area, including approximately 20% from a single trap. The number of beetles in 2018 should be greatly reduced because the spring treatment targeted the offspring of the 2017 adults (the beetles captured this summer). 

Small populations of Japanese beetles were also detected at Portland International Airport (PDX), Swan Island in Portland, and Oakland, OR. These detections are assumed to be unrelated to the population near Cedar Mill. 

Japanese beetle resources​

2018 Japanese Beetle Eradication Response Plan

2018 Response Plan for Japanese Beetle Eradication

2018 Japanese Beetle Treatment and Quarantine Map

Japanese beetle treatment and quarantine map

Acelepryn G® Frequently Asked Questions

Acelepryn G® pesticide product information from Oregon Health Authority. Acelepryn G® FAQs

Granular Insecticide for JB

Acelepryn® G insecticide label

Help Save the City of Roses from Japanese Beetle

Information about the Japanese beetle, its current status in Portland, the proposed treatment, and resources.

Japanese Beetle Economic Risk Assessment

Japanese Beetle Economic Risk Assessment

Japanese Beetle Frequently Asked Questions

Frequently asked questions about Japanese Beetle

Japanese Beetle in Oregon

Yearly summary report for Oregon's Japanese beetle trapping and eradication program 2017 Summary Report

Japanese Beetle in Oregon Environmental Assessment (2016)

JB Environmental Assessment

Japanese Beetle Look-Alikes Guide

A visual guide to Japanese beetle look-alikes

Japanese Beetle Yard Debris Quarantine Flyer (2018)

JB Yard Debris Quarantine Flyer (2018)

Japanese Beetle: A Major Pest of Plants

Brochure about Japanese Beetle

Japanese Beetle: Threat and Opportunity in Oregon

Japanese Beetle Threat and Opportunity pdf document

Light brown app​​le moth

Light brown apple moth (LBAM) detections

The Oregon Department of Agriculture (ODA) caught 1 light brown apple moth in 2010, 2 in 2015, and 3 in 2016. All moths were caught within a one square mile area south of Independence in Polk County. Catching moths in 2015 and then again in 2016 in the same general area indicated the presence of a breeding population of LBAM. 

2017 LBAM eradication project south of Independence, Polk County

The eradication project included:

  • Adult LBAM treatments: Two applications of SPLAT, a mating disruption pheromone, applied by airplane
  • Larval LBAM treatments: Three applications of Bacillus thuriengensis kurstaki (Btk), a biological pesticide​, applied by airplane
  • Delimitation traps placed in the vicinity of the treatment area and detection traps placed statewide.​​
All aerial treatments have been completed for 2017. Delimitation trapping will be completed in late October.

​​​Gypsy moth

The Oregon Department of Agriculture, in conjunction with USDA and other federal and state agencies, conducted an eradication program in the North and Northwest Portland area in 2016. Approximately 7,000 acres were treated in April and May with an aerial application of a biological pesticide Bacillus thuringiensis kurstaki to eradicate the Asian and European gypsy moth infestation. The treatment phase was completed in 2016, and we are currently in the second year of the trapping detection phase. 

ODA has completed the trapping program for the 2017 season. We did not detect any Asian gypsy moths in the Portland area, indicating the treatment was a success. 

ODA detected a total of 11 European gypsy moths in Oregon in 2017, in Benton, Multnomah, Lane and Josephine counties. Detection traps will be placed accordingly throughout the state starting in spring 2018. No eradication is proposed. 


Grasshopper suppression

Oregon participates in a federal program to monitor, and suppress when necessary, grasshoppers and Mormon crickets. Even though not all grasshopper species are pests, outbreaks can vary in their magnitude and geographic expanse. Early intervention can dampen the severity of an outbreak cycle.

Grasshopper survey report

The 2015 Oregon grasshopper survey season showed a continuing increase in the grasshopper population which had been declined through 2013 from a high in 2011. An estimated 2.4 million acres across eastern Oregon were found to be economically infested. ODA and USDA-APHIS did not participate in any control efforts during 2015, though from various informal reports we believe there were several programs for treating privately held land.​​

Grasshopper resources​​​​​​​​​​

Grasshopper & Mormon Cricket information-USDA

USDA Grasshopper Mormon Cricket website

Grasshopper Report

Grasshopper Report Summary (full) Document

Grasshopper Report Summary

Grasshopper Report Summary (brief) Document



Gypsy moth and Japanese beetle

Jessica Rendon
Entomologist/ JB Response Coordinator
Insect Pest Prevention & Management
Phone: ‭503-871-6133‬
Jim LaBonte
Interim Program Manager
Insect Pest Prevention & Management
Phone: 503-986-4663
Chris Hedstrom
Insect Pest Prevention & Management
Phone: 503-986-4654


Paul Blom
Insect Pest Prevention & Management
Phone: 503-508-1253

​​General questions

Insect Pest Prevention & Management
Phone: 503-986-4636