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.

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.

Irrigation Water Recirculating Systems

A report on studies conducted to determine whether irrigation water recirculating systems increases the spread of pathogens. Topics discussed include root death, factors causing root growth check, other possible pathogen sources, and chemical treatments.

Strategies for Turfgrass Renovation

Practical strategies for the renovation of turfgrass, used to improve existing turf or change grass species for improved performance. The basic strategies discussed include simple overseeding, overseeding following suppression of existing turf, and complete renovation.

Poinsettias - Leaf Malformation

Greenhouse Crops
Information provided on the greenhouse crop poinsettias and the possible causes of poinsettia leaf malformation. The Oregon State University affiliated author briefly discusses several possible causes which include chemical, disease, heat stress, water stress, and nutrient deficiencies.

Getting to the Root (and Corm) of Cyclamen Diseases

Greenhouse Crops
An informative discussion about common Cyclamen diseases. The author addresses Botrytis, Pythium, Thielaviopsis, Rhizoctonia, Fusarium, and Erwinia. Descriptions of pathogen symptoms and signs are provided along with possible control options.

Maintaining Disease-Free Geranium Stock Plants...The Impossible Dream?

Greenhouse Crops
The Oregon State University affiliated author discusses methods and practices used to reduce or eliminate disease in geranium stock plants. Common geranium pathogens include Botrytis, Pythium, Rhizoctonia, Thielaviopsis, Xanthomonas, and Verticillium wilt.

Greenhouse Management of Western Flower Thrips and Tomato Spotted Wilt Virus

Greenhouse Crops
The Western flower thrip (Frankliniella occidentalis), a vector of tomato spotted wilt virus, is discussed. Information is provided on the following topics; the virus, thrips identification and lifecycle, management, barriers, monitor, chemical controls, and sanitation.