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January 22, 2004
The first article I wrote for GPN was on Botrytis prevention and control, and it appeared in October of 1998. Five years is probably long enough to wait to do an update since we have maintained an active research program in fungicide control of...
November 06, 2003
Now that I have the chance to explain to you what is new in the disease control sphere, I find myself thinking that you might not have taken advantage of what was new last year, or the year before last. The flower industry is conservative about...
November 04, 2003
Selecting the correct product for the job is very important to the success of a pest management program, but equally important is the equipment and application technique used to apply the pesticide. To help select the right application and equipment...
November 04, 2003
Wouldn't it be nice if you had about 135 different options for mealybug control like I had options for governor a few months ago? Yes, that's right, I live in California. If you had that many options, you would be just as confused picking the best...
October 03, 2003
The impact of fungus gnat larvae on greenhouse crops has been difficult to assess since feeding damage occurs on the root system within the potting medium. The larvae feed on fungi and organic matter in the media, in addition to feeding on healthy...
August 22, 2003
"Can I use tank mixes?" This is a question I have heard from growers for more than 25 years, and I still do not have an answer that is backed up by facts and figures. Tank mixes were a common practice during my early experience with greenhouse...
August 22, 2003
Growing media can be a mixed bag, so it's important to keep an eye on your options. You never know when something new might burst on the scene or when something about your current growing media will change. For example, according to the Canadian...
August 18, 2003
p class=MsoNormal>Since 1961, the American Floral Endowment (AFE) has invested $11 million in scientific research and educational programs. The Special Reports are a result of Endowment-funded scientific research projects at universities throughout...
August 08, 2003
The biological control process sparks many questions. First, what is biological control of plant disease? It is the involvement of the use of beneficial microorganisms, such as specialized fungi and bacteria, to attack and control plant pathogens...
July 03, 2003
Methyl bromide is an important part of ornamental production. The combination of methyl bromide and chloropicrin has long been used to control weeds, nematodes and plant pathogens like Pythium. The majority of this fumigant is used for strawberries...
July 03, 2003
Now that the 2003 spring season is behind us, it's time to recap problem areas. Working with my clients and traveling around the United States giving talks, I can narrow down the number of areas that need work to five. There are obviously more...
July 02, 2003
Hardy hibiscus is an old-time garden favorite riding a new wave of popularity. Hibiscus moscheutos is a marshland native of the eastern United States and has hardiness in USDA Zones 4-9. With new developments in plant breeding, today's hibiscus...
June 12, 2003
Vegetative annuals are excellent niche plants for spring, summer and fall production. The wide spectrum of available colors and plant forms has contributed greatly to their success. While these plants are "hot" with consumers, sometimes growers may...
May 08, 2003
Black root rot (BRR) is a common and destructive fungal disease that attacks a variety of greenhouse bedding and pot crops. The disease is widespread, having been reported on many different hosts, including poinsettia, fuchsia, pansy, vinca, petunia...
April 22, 2003
Herbs are used throughout the United States for culinary and medicinal purposes. Total sales of culinary herbs were $30.9 million in 1998. The annual retail sales of medicinal herbs in the United States in 1994 was $1.6 billion and nearly $4.0...
April 18, 2003
Hemerocallis 'Little Missy' is a new diploid daylily that was recently introduced by DeVroomen Holland Garden Products. This cultivar reaches 2 feet tall, bearing beautiful, purple-red flowers with fine, white edges and a contrasting yellow throat....
March 21, 2003
Ralstonia Outbreak Several U.S. growers can now add a new disease to their repertoire: Ralstonia solanacearum biovar 3 race 2. One of the vascular, bacterial agents that causes southern bacterial wilt, R. solanacearum biovar 3 race 2 was recently...
March 18, 2003
There is much talk about how we as a society must stop cloning at all costs. Just think about what would happen if humans were to become like aphids. Sexual reproduction would no longer be necessary, and all females would be born pregnant. Well all...
February 28, 2003
Managing plant height, insects and mites, and the many diseases that affect greenhouse-grown bedding and potted plants are some of the many challenges that face today's growers. Most pest and plant growth problems are controlled by using a variety...
February 28, 2003
If not managed properly, algae will have a direct impact on the bottom line of your business. It takes more than chemicals to solve the problem. It takes an understanding of how algae develops, grows and spreads, and the chemical and non-chemical...