A Systematic Approach to Diagnosing Plant Damage

A comprehensive guide for determining the difference between nonliving and living causes of plant damage. The authors also provide a list of available references for identifing plant problems, references topics vary from general plant problem diagnosis to crop specific.

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.

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.

Plant Pathogens - Plant Diagnosis Clinic

Plant Disease
An overview of the B.C. Ministry of Agriculture and Fisheries plant diagnosis clinic at Cloverdale. The author discusses the history of the clinic, types of specimens examined, identified diseases and associated crops, and grower losses due to disease.

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).

Container Spacing Strategies Modify Media Temperature and Plant Growth

Nursery Crops
Research was conducted to determine container spacing strategies to reduce the effects of media temperature increases. The study was completed at a nursery in Florida using Ilex crenata `Helleri'. The authors discuss the results and offer incites into potential spacing strategies.