Suppression and Eradication Programs

​Gypsy moth

The Oregon Department of Agriculture (ODA) and other state and federal cooperators caught two Asian gypsy moths (AGM) and 12 European gypsy moths (EGM) in the state in 2015:

  • Port of Portland Terminal 4 area in St. Johns, 1 AGM moth
  • Forest Park, 1 AGM moth
  • Portland Metro/Tri-county area, 5 EGM moths
  • Grants Pass, 7 EGM moths

All gypsy moth treatments have been completed in the North and Northwest Portland area. Approximately 8,000 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. To view the area where the treatment took place please view the map.

Additional traps have been placed to monitor the success of the eradication and to pinpoint any remaining populations. 

​Gypsy moth resources

2016 Asian Gypsy Moth Environmental Assessment (EA)


2016 Asian Gypsy Moth Treatment Map

A map that is frequently updated showing the 2016 AGM treatment progress. ESRI Online Map

Asian Gypsy Moth: Threat and Opportunity 2016


B.t.k. Information from the National Pesticide Information Center (NPIC)

YouTube Video

Effects of Aerial Btk on Non-Target Lepidoptera Caterpillars


Gypsy moth awareness video

From the Washington Dept of Agriculture, this video includes 13 ways gypsy moths damage the ecosystem, the economy, and harm people. Also included, how to identify gypsy moth and eradication methods. YouTube Video

Gypsy Moth Eradication Program Overview

Basic information about gypsy moth eradication Document

Gypsy Moth in Oregon

Yearly summary report for Oregon's gypsy moth trapping and eradication program Document

Gypsy Moth: A Destructive Forest Pest


Invasion of Gypsy Moth Caterpillars in Hanover Township, Pennsylvania


ODA news on gypsy moth

News blog

Oregon Gypsy Moth Detection Map (2015)


Oregon Health Authority: Btk Insecticide FAQs


Phenology of Butterflies and Moths in Oregon in relation to Asian Gypsy Moth eradication efforts


Report from the Technical Working Group in Response to the Asian Gyspy Moth Captures (Washington-Oregon 2015)


Support Letter from British Columbia for the 2016 AGM Eradication


Support Letter from the Northeastern Area Association of State Foresters for the 2016 AGM Eradication



Japanese​​ beetle

2016 Proposed Japanese bee​tle eradication project at PDX and vicinity

The Oregon Department of Agriculture trapped four Japanese beetles in 2015, all at PDX and vicinity:

  • Airtrans Center, 2 beetles
  • Air Cargo Rd, 1 beetle
  • 47th Ave, 1 beetle

This compares with 13 beetle catches in 2014 and 25 beetle catches in 2013.​

ODA proposes to conduct an eradication program at the Airtrans Center and 47th Ave:

  • ​One application of Acelepryn targeting the grub stage of the beetle are planned for May, 2016. No foliar sprays are planned.

​​Japanese beetle resources

Japanese Beetle in Oregon

Yearly summary report for Oregon's Japanese beetle trapping and eradication program Document


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

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


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