New Pesticide Rules to Protect Ground Water Adopted by Washington State Department of Agriculture

An overview of the pesticide rules adopted by the Washington State Department of Agriculture in 1989. The new rules restricted pesticides containing one of more of the 18 active ingredients identified as having potential to contaminate ground water.

1988 Amendments to FIFRA - What do They Mean?

An explanation of the 1988 amendments to the Federal Insecticide Fungicide and Rodenticide Act (FIFRA). The authors address what the amendments meant for growers, types of crops most affected, and concerns about pesticide re-registration.

Susceptibility of Pacific Northwest Conifers to Phytophthora Root Rot

Plant Disease
A study was conducted on Phytophthora root rot and the susceptibility of Pacific Northwest conifers. Twelve species of conifer were tested for susceptibility to five species of Phytophthora. Report includes methods, results, conclusions, and recommendations.

Tomato Spotted Wilt Virus and Western Flower Thrips: Update

Plant Disease
Update report on tomato spotted wilt virus (TSWV) and western flower thrips. The Oregon State University affiliated author provides information about the plant species affected, genetic resistance to TSWV, insecticides, and cultural practices.

Soil Pasteurization and Mycorrhizal Inoculation Alter Flower Production and Corm Composition of Brodiaea laxa 'Queen Fabiola'

Research was conducted on the wild hyacinth 'Queen Fabiola' (Brodiaea laxa) to determine whether the addition of mycorrhizal inoculum into the growing medium of Brodiaea laxa altered aspects of flower production, corm production, and corm quality.

Aphids: A Brief Introduction

The Oregon State University Department of Entomology affiliated author briefly discusses aphids and their impact on plants. Other topics also addressed in the discussion include control using natural enemies of aphids and management methods.

Simple Monitoring of Black Vine Weevil in Vineyards

The adult black vine weevil (Otiorynchus sulcratus Fabricus), a well-known pest of ornamentals, started to make its way into vineyards located in the south central coast of California in the late 80's. A study conducted on control of the pest in vineyards is discussed.

Resistance of Pests to Pesticides

Information on methods designed to reduce and/or prevent pesticide resistance build up in insect or mite populations. Topics addressed include background information on resistance, pest biology, pesticide use, proper pesticide use and application.

Biology and Control of Honeylocust Pod Gall Midge

A brief discussion about the honeylocust pod gall midge (Dasineura gleditschiae), a pest of Oregon honeylocust trees. The Oregon State University affiliated author addresses the biology and chemical control of the honeylocust pod gall midge.

New Insect and Mite Pests of Conifers

The Oregon State University affiliated author discusses several pests of conifers and possible controls. The pests addressed include an eriophyid mite ("leaf vagrant" type), coneworms (Dioryctria), and a spider mite (Eotetranychus libocedri).