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October 19, 2007
Leaves dropping off plants, brown blotches on leaves and stunted seedling: all telltale symptoms of downy mildew on coleus. Both seed and vegetatively propagated types are susceptible. The brown or blighted areas on diseased foliage have an...
September 19, 2007
When it comes to selecting a miticide to control spider mites or “mites” in the greenhouse or outdoors, there is oftentimes confusion that all miticides are similar in terms of their use patterns and the range of mites that are controlled. However,...
September 19, 2007
Gaillardia adorns its native North and South American habitats and cultivated gardens with daisy-like flowers of red and yellow, which resemble vibrant-colored blankets created by American Indians. Hence, gaillardia has been given the common name of...
December 13, 2006
What some thought 10 years ago would be a trend that would eventually fade away has instead established itself as a new form of gardening, undoubtedly claiming its permanent spot in horticulture: container gardening. What started with hanging...
December 13, 2006
There have not been many plant growth regulators introduced for greenhouse crops over the past 15 years. One of the newer PGRs is Topflor (flurprimidol). At North Carolina State University, we have conducted extensive trials over the past five...
December 13, 2006
In the second article of our 2-part series, we are presenting research-based information from North Carolina State, Clemson and Michigan State Universities on how to properly manage two of the most critical components of the propagation environment...
November 15, 2006
Post-patent products, new experimental products and an evolution in how chemicals are applied are the topics in this year’s look at plant growth regulator (PGR) trends. All of our registered growth regulators are older chemicals and no longer...
November 15, 2006
Each year I face a challenge to think of enough topics for the articles, columns, newsletters and talks that I do. I have been doing the fungicide update for GPN off and on for about seven years, and sometimes I know what I want to write about...
November 15, 2006
For the last few years, the prospects for new chemistries were rather bleak, so it finally feels good to have some hope. In addition, most of the new chemistries are reduce-risk or organophosphate (OP) replacement products. IR-4 (www.ir4.rutgers....
August 15, 2006
New cut flowers are fun to look at in the catalogs, research on the Internet and discuss with fellow growers. Expectations are high when the seed or plugs first arrive. Of course, a few cultivars fall by the wayside during the production process,...
August 15, 2006
Ask any group of growers how their spring growing seasons were and you usually get many different answers. But this year you would be amazed at how similar their answers really are. Every grower is different, but their experiences this spring were...
July 06, 2006
The liner dip method for applying plant growth regulators (PGRs) is finding increased acceptance with growers. Liner dips are an efficient and effective way of controlling vigorous crops. However, in some cases inconsistent results have been...
July 06, 2006
The popular Miscanthus sinensis is undoubtedly the most commonly produced ornamental grass. ‘Super Stripe’, also referred to as porcupine grass, is a great addition to this species and offers many improved attributes over other cultivars. Breeder...
July 03, 2006
Containers are spaced at certain distances to obtain marketable plants and reasonable profits per square foot of production area. There is a tradeoff between container spacing and plant quality: Closer spacing tends to reduce plant quality (...
June 14, 2006
The principal method used for fertilizing greenhouse crops is to apply completely soluble fertilizers with a fertilizer injector (or proportioner). Fertilizer injectors “inject” a small quantity of concentrated fertilizer solution (stock solution)...
June 14, 2006
With its ease of production and ability to flower the first year, Coreopsis grandiflora ‘Sunfire’ is a great addition to spring perennial programs. ‘Sunfire’ produces an abundant supply of large, single, yellow blooms with burgundy-red centers, and...
June 05, 2006
Increasing efficiency — that is what this article is all about. You might be thinking, well, who made Jim Snyder the expert on efficiency? I’m the first to say I’m not an expert, but I’m always looking for a new idea I can use — whether it is a new...
March 23, 2006
The efficiency, capacity and versatility of most mechanized plant-handling systems depend on the right materials being in the right place at the right time. Whether supplying soil or pots to a filling machine or moving plants from the growing area...
December 13, 2005
Controlling plant height of bedding plants can be one of the biggest challenges for greenhouse growers, especially when trying to produce containers or hanging baskets that contain more than one plant species. One new strategy is to dip or soak the...
November 08, 2005
Helianthus annuus and Rud-beckia hirta are popular garden plants with many prospects for use in the landscape. Recent selections with compact growth habits are not only excellent choices for conventional gardens but for use in borders,...
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