Some Practical Tips on Pruning Shrubs

The comprehensive guide to pruning shrubs is broken down into three main categories; plants flowering on current years growth, plants flowering on old growth, and plants grown for special effects. The author also addresses problems, solutions, and conclusions in relation to pruning shrubs.

Plant Cost Accounting: A Personal Computer Program to Calculate Crop Production Costs and Price Per Plant

A discussion about the computer program, Plant Cost Accounting, intended for use by greenhouse and nursery business or growers. The computer program allows the user to accurately calculate the costs involved in plant production and price the plants accordingly.


Information provided by the author intended to aid in the identification and management of the greenhouse whitefly (Trialeurodes vaporariorum) and the sweetpotato whitefly (Bremisia tabaci). Monitoring whiteflies, chemical control and whitefly resistance, and biological control are discussed.

Use of Yellow Sticky Traps in Greenhouses

Greenhouse Crops
A brief report on the yellow stick traps used in greenhouses to monitor and/or reduce certain pest populations. The topics discussed include; types of pests caught by the traps, how often to check traps, where to put traps, how many traps to use, and whether traps should be vertical or horizontal.

Update on Western Flower Thrips

An update for the greenhouse industry regarding the Western flower thrips and tomato spotted wilt virus. Growers were starting to report western flower thrip resistance to certain insecticides. Western flower thrips lifecycle along with possible control methods are discussed by the authors.

Update on Tomato Spotted Wilt Virus

Greenhouse Crops
Increasing number of reports of greenhouse crops displaying symptoms of tomato spotted wilt virus (TSWV) prompted the authors to address the issue. Topics discussed are; the history of TSWV in the US, the wide variety of ornamental and non-ornamental hosts, symptoms, and control.

Symptoms of Stephanotis Infected With Tomato Spotted Wilt Virus

Greenhouse Crops
Discussion about the discovery of tomato spotted wilt virus found to be infecting the greenhouse crop Stephanotis floribunda Brongn. The Oregon State University affiliated authors include when the disease was first noticed in Oregon greenhouses and a description of the symptoms.

Tomato Spotted Wilt Virus in Greenhouse Crops

Greenhouse Crops
A brief report on tomato spotted wilt virus (TSWV). The discussion focuses on host plants for the disease, which includes a wide range of flowering greenhouse crops, common weed hosts, and vegetable crops. The author also addresses transmission and control of TSWV.

Cancer Risk: There is More to Pesticide Safety Than Acute Toxicity

Report on the cancer risks of pesticide exposure and studies conducted to determine the effects of exposure to a variety of pesticides. The author discusses the results of the studies and their implication for the health of farmers and offers safety recommendations.

Select the Right Gloves to Protect Yourself When Handling Chemicals

Information provided on the importance of glove selection to achieve maximum protection when handling chemicals. Specific glove materials, matching the glove material to the specific chemical being handled, and other considerations for glove and clothing selection are also addressed.