University of Idaho - I Banner

Visit UI

Learn about the many reasons the University of Idaho could be a perfect fit for you. Schedule Your Visit

Student Life

Fill your college experience with memories and connections that will define you as an individual and empower you for a lifetime. Explore

Parents on campus during orientation

Parent Newsletter

Keep up on campus events and information involving your Vandal student. Sign Up

UI Retirees Association

UIRA has a membership of nearly 500 from every part of the University. Join Today

Insect Pests Publications & Resources

2019 Pacific Northwest Insect Management Handbook > HTML
A comprehensive guide to insect management in commercial crops and environments and in home landscapes and gardens in the Pacific Northwest. Covers pesticide safety and toxicity, protecting . . . . . more details

Alaska Field Guide to Potato Pests and Beneficial Insects in English and Russian > PDF
This 128-page pocket-sized manual helps potato field workers scout for and identify economically important diseases, insects, and weeds in potato crops in Alaska. Each pest or beneficial insect is ass . . . . . more details
Order now >

Barley Thrips Biology and Control > PDF
The barley thrips is a pest in Idaho that has caused economic damage in barley crops. This publication covers the damage, description, distribution and biology of barley thrips as well as treatment in . . . . . more details

Biology and Management of the Potato Tuberworm in the Pacific Northwest > PDF
Since 2000, potato tuberworm, a difficult-to-control insect pest, has been detected in Oregon, Washington, and Idaho. This publication describes its distribution, hosts, identifying characters, and bi . . . . . more details

Boxelder Bug: Nuisance Management for Homeowners > PDF
Although not particularly harmful, these insects can be aggravating when they wander indoors to spend the winter. Learn about the insect's seasonal biology, landscape features that increase pest probl . . . . . more details

Cereal Leaf Beetle > PDF
A pest of small grains, the cereal leaf beetle now occurs in 29 Idaho counties. Learn about its host plants, appearance, life cycle, damage, and control recommendations. Five color photographs picture . . . . . more details

Clover Root Curculio in Alfalfa: Identification, Biology, and Management > PDF
This publication helps growers in Idaho, Oregon, and Washington to identify clover root curculio infestations and to design an Integrated Pest Management (IPM) program for managing clover root curculi . . . . . more details

El control de polillas: Las Bolas de Naftalina y Otros M > PDF
Spanish version of PNW 606: Mothballs: Proper Use and Alternative Controls for Clothes Moths. Authors: David Stone, Tim Stock 2 páginas . . . . . más detalles

Fall Pest Problems of Winter Wheat > PDF
This publication discusses the most common arthropod-associated problems that occur when winter wheat is planted too early, including Russian wheat aphid (Diuraphis noxia (Mordvilko)), barley yellow d . . . . . more details

Grasshopper Management in the Pacific Northwest > HTML
Grasshoppers are common plant-feeding insects in the Pacific Northwest but large numbers of them can devastate crops like alfalfa, cereals, corn, potatoes, and grasses. This publication will help you . . . . . more details

Haanchen Barley Mealybug: A New Pest of Barley Emerges in Idaho > PDF
A new pest in at least four varieties of barley, the Haanchen barley mealybug, was found for the first time in southern Idaho's Bingham, Bonneville, Caribou, Jefferson, and Madison counties in 2003. . . . . . more details

Hobo Spiders in Idaho > PDF
This Idaho Green Thumb How-to fact sheet covers identification and control of hobo spiders, mistakenly referred to as "aggressive house spiders." These spiders can bite, but are no longer thought to b . . . . . more details

Homeowner Guide to Centipedes and Millipedes > PDF
This publication helps you to identify these many-legged relatives of insects, to understand their biology and feeding habits, and to make a decision as to whether they are creating enough of a nuisan . . . . . more details

Homeowner Guide to Pillbugs and Sowbugs > PDF
This publication helps you to identify these many-legged relatives of insects, to understand their biology and feeding habits, and to make a decision as to whether they are creating enough of a nuisan . . . . . more details

Homeowner Guide to Scorpions and Their Relatives > PDF
This publication helps you identify scorpions and pseudoscorpions and understand the threats they pose. Full color. Authors: Edward John Bechinski, Dennis J. Schotzko, and Craig R. Baird . . . . . more details

Identification and Habits of Key Ant Pests in the Pacific Northwest > PDF
This publication describes the 12 most common ants characterized as structural pests in Washington, Idaho, and Oregon. Drawings and descriptions follow an introduction to ants and their general biolog . . . . . more details

Identifying the Corn Blotch Leafminer > PDF
Large populations of corn blotch leafminer, a pest recently discovered in Idaho, can lead to crop losses similar to those caused by hail. This publication describes the pest and its impacts on corn le . . . . . more details

Integrated Pest Management for the Wheat Head Armyworm Complex in the Pacific Northwest > PDF
The wheat head armyworm complex is comprised of two armyworm species, Dargida diffusa (Walker) and Dargida terrapictalis (Buckett), which caused recent and sporadic damage to cereal . . . . . more details

Large Raspberry Aphid (Amphorophora agathonica) > PDF
Large raspberry aphid, Amphorophora agathonica, is an important pest in red and black raspberries in the Pacific Northwest. It transmits plant viruses that cause decreased cane vigor and frui . . . . . more details

Large Yellow Underwing: A New Cutworm in Idaho > PDF
The large yellow underwing cutworm, first detected in Idaho in 2005, is a potential threat in Idaho winter wheat and barley, Austrian winter peas, alfalfa, grass forages, winter vegetables and home ga . . . . . more details

Leafhoppers in the Landscape > PDF
Leafhoppers are small, winged insects that cause damage to trees and shrubs and are a nuisance for homeowners in Idaho. This publication describes the four common species of leafhoppers found in Idaho . . . . . more details

Lesser Bulb Flies on Potatoes in the Pacific Northwest > PDF
Lesser bulb flies have damaged more than 10 percent of tubers in some Idaho fields. Learn to identify this pest and read what cultural control practices minimize the problem. Authors: Jam . . . . . more details

Management of White Pine Weevil in Spruce > PDF
In the West the white pine weevil, Pissodes strobi, almost exclusively attacks spruce rather than pine trees. Of major concern to homeowners, nurseries, and landscape businesses, the weevil c . . . . . more details

Managing Boxelder Bugs Around Your Home > PDF
A common nuisance pest in Idaho, boxelder bugs can become intolerably numerous. Learn their appearance, hosts, and life cycle and ways you can manage them with and without insecticides. Aut . . . . . more details

Managing Elm Seed Bugs around Your Home > HTML
The elm seed bug (Arocatus melanocephalus) in Idaho invades homes in July and August from surrounding landscapes where elm trees grow. Posing no direct threat to plants or people, they can still becom . . . . . more details

Mothballs: Proper Use and Alternative Controls for Clothes Moths > PDF
Learn the right ways to use mothballs-chemical fumgiants-to protect your clothes and your health. Authors: David Stone and Tim Stock 3 pages . . . . . more details

Natural Insecticides > PDF
This publication addresses the common misconceptions associated with products labeled "natural" and "organic," and describes related insecticides intended for home gardening. Categories include biolo . . . . . more details

Organic Management of Flea Beetles > PDF
Flea beetles are common garden pests found throughout the Pacific Northwest. Flea beetle feeding on plants in the Brassicaceae and Solanaceae families can scar foliage and potato tubers, leading to re . . . . . more details

Pantry Pest Guide: Common Insect Culprits in Homes and Kitchens of the Pacific Northwest > PDF
The purpose of this guide is to help residents in the Pacific Northwest to identify common insect pests that occur in pantries and kitchens. This guide is not meant to be all inclusive, but is meant t . . . . . more details

Potato Tuberworm: A Threat for Idaho Potatoes > PDF
Potato tuberworm has damaged potato crops in Oregon and could threaten Idaho potatoes. This publication describes the pest, its life cycle, and the damage it causes and goes into ways to manage the . . . . . more details

Sugar beet root aphids: identification, biology, and management > PDF
Sugar beet root aphids feed on the roots of sugar beet plants throughout major North American sugar beet-growing regions. In severe cases, they may reduce tonnage and sucrose levels by more than 30 . . . . . more details

Sugar Beet Root Maggot: Identification, Biology, and Management > HTML
The sugarbeet root maggot is a serious pest in southern Idaho. Learn how to manage this harmful insect by designing an integrated pest management (IPM) program. The IPM approach combines cultural cont . . . . . more details

Tuxedo Bug: A New Home-Invading Insect in Idaho > PDF
Learn how to identify tuxedo bugs in your home and understand why they moved in. Publication includes control recommendations, including advice about insecticides and alternatives to them. . . . . . more details

Twospotted Spider Mite on Sugar Beet: Importance, Identification and Management > HTML
Since 2012, sugar beet production in Idaho, Oregon, and Washington has seen a significant increase in twospotted spider mites (TSSM) populations. This publication outlines the symptoms of a TSSM pest . . . . . more details

Wasp and Hornet Control > PDF
Learn to recognize Idaho's stinging yellowjackets, bald-faced hornets, and paper wasps and to control them with or without chemicals. Authors: Stuart C. Parkinson, Danielle Gunn, Edward Bec . . . . . more details

Western Corn Rootworm in Eastern Oregon, Idaho, and Eastern Washington > PDF
Discusses how to identify and manage outbreaks of western corn rootworm. Topics include hosts; life cycle; damage; management with practices such as crop rotation, monitoring, insecticides, and resis . . . . . more details

Wireworm Biology and Nonchemical Management in Potatoes in the Pacific Northwest > PDF
This publication reviews the technical literature on wireworms and provides information on wireworm biology, monitoring, risk assessment, and nonchemical control options that can be integrated into a . . . . . more details

Wireworms in Idaho Cereals: Monitoring and Identification > PDF
This publication introduces wireworm species found in southern and eastern Idaho, provides guides to monitoring wireworm numbers and identifying predominant species in the region, and gives recommenda . . . . . more details

Local Information

select office to view website

University of Idaho Extension


Physical Address:
E. J. Iddings Agricultural Science Laboratory, Room 10
606 S Rayburn St

Mailing Address:
875 Perimeter Drive MS 2332
Moscow, ID 83844-2332

Phone: 208-885-7982

Fax: 208-885-9046



Barbara Petty