Suppression and Eradication Programs

Japanese beetle

Green waste quarantine

The green waste quarantine for Cedar Mill and nearby areas are in effect through the Fall and Winter 2017/2018. The quarantine applies to the all areas and residences treated in 2017. All green waste and plant materials from the area (leaves, soil and sod) should be disposed of in curbside bins as normal. Any larger loads need to be taken directly to our green waste dropoff site at Northwest Landscape Services, 1800 NW Cornelius Pass Rd in Hillsboro. Please contact us with questions. 

2017 Japanese beetle ​detections

We are in the process of bringing in the last of our Japanese beetle (JB) traps from all over the state. 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. This means that the number of beetles in 2018 should be greatly reduced, as 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. 

Proposed Spring 2018 Japanese beetle eradication project in Cedar Mill and Bethany

We are currently creating our proposed response plan for 2018. The Japanese beetle eradication project is a proposed five-year project and expected to continue through 2021. 

Japanese beetle resources​

2017 Japanese Beetle Treatment Map with Trap Catches

ArcGIS Online 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 2016 Summary Report

Japanese Beetle Look-Alikes Guide

A visual guide to Japanese beetle look-alikes

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


Grasshopper Report

Grasshopper Report Summary (full) Document

Grasshopper Report Summary

Grasshopper Report Summary (brief) Document



Gypsy Moth and Japanese Beetle

Chris Hedstrom
Insect Pest Prevention & Management
Phone: 503-986-4654
Clinton Burfitt
Program Manager
Insect Pest Prevention & Management
Phone: 503-986-4663
Barry Bai
Insect Pest Prevention & Management
Phone: 503-986-4645


Paul Blom
Insect Pest Prevention & Management
Phone: 503-508-1253
Insect Pest Prevention & Management
Phone: 503-986-4636