July 2, 2017
Why Biological Control Fails: Encapsulation May be the Culprit
If your biological control isn’t working for you, encapsulation could be to blame. Learn how this defensive response can cripple a biological control program.
July 25, 2016
How You Can Stop Aphids By Understanding Their Interactions With Plants
Knowing which aphids target which crops and how aphids colonize and move on plants goes a long way toward setting up an effective management plan.
July 7, 2016
Two Industry Veterans Discuss How To Meet The Challenges Of Grower Education
Two industry players have a conversation on how we can deliver the level of grower education needed to address complex issues associated with production practices and pest management strategies.
February 17, 2015
A New Look At Biological Control: Can Plants Affect The Performance Of Natural Enemies?
The success of a biological control program depends on a number of factors including quality of natural enemies, timing of release, release rates and environmental conditions. However, what is typically not taken into consideration is how plants can affect the performance of natural enemies, including attack rate and searching ability. Biological control agents work hard to protect plants, but plants have ways to help themselves, too.
April 29, 2014
Industry Perspective: Systemic Insecticides And Bees: Are We Revisiting “Silent Spring”?
The impact of systemic insecticides on bees and other pollinators is not new phenomenon. Kansas State University Entomology Professor Raymond Cloyd says we, as an industry, need to work together to provide unbiased information that is based in sound science.
January 19, 2011
Pesticide Resistance In Natural Enemies
Pesticide resistance is always a concern because once an arthropod (insect or mite) pest population can no longer be adequately suppressed with existing pesticides, then management options become limited. Resistance is the genetic ability of some individuals in an arthropod pest population to survive an application or multiple applications of a pesticide. In other words, the pesticide no longer effectively kills a sufficient number of individuals in the arthropod pest population. Resistance develops at the population level and is an inherited trait. As such, surviving arthropod pests can pass traits genetically onto their offspring or next generation, enriching the gene pool with resistant genes (alleles). The amount of “selection pressure,” or the frequency of applying pesticides, is the main factor that influences the ability of an arthropod pest population to develop resistance to pesticides. This then increases the proportion or frequency of resistant individuals. However, there are sometimes inquires or […]
May 27, 2009
Taking Out Spider Mites
Two-spotted spider mite, Tetranychus urticae, is still one of the most destructive mite pests of greenhouse-grown crops. Because it is so destructive, greenhouse producers use miticides to alleviate problems and avoid excessive mite outbreaks. Several commercially available miticides are called mitochondria electron transport inhibitors, or METIs, which disrupt the production of energy or adenosine triphosphate (ATP). But before any specifics are addressed, it’s important to note the significance of the mitochondria. The mitochondrion is a membrane-bounded organelle that is associated with intracellular respiration. It is a major site of ATP production and oxygen consumption in cells, and it retains enzymes involved in the citric-acid cycle and in oxidative phosphorylation. Overview Miticides active on mitochondria include acequinocyl (Shuttle), pyridaben (Sanmite) and fenpyroximate (Akari). These miticides either inhibit NADH dehydrogenase (complex I) associated with electron transport, act on the NADH-CoQ reductase or bind to the Qo center or cytochrome bc1 (complex III) […]
June 20, 2008
Fungus Gnat Management
Fungus gnats (Bradysia spp.) are major insect pests of greenhouse crops and can cause economic losses across a wide range of crops during stock plant, propagation and finished plant production. Female fungus gnat adults lay eggs in growing media, and the emerging larvae feed on the roots and crown. Fungus gnat management is an ongoing focus of our research team. The objective of the study reported here was to evaluate the efficacy of different insecticides applied as media drenches. The notable feature of this study was that we tested insecticides at several geographic locations simultaneously. We used poinsettia as a model test crop because it was grown in all the collaborating greenhouses. Research Methods Six-inch poinsettias were grown in eight greenhouse locations that included seven commercial growers in Colorado, Michigan, New Hampshire, New Jersey and the University of New Hampshire (UNH). Ten containers received each insecticide treatment in each location. There […]
June 18, 2008
Impact Of Fungicides On Natural Enemies
Previously, I have written articles on the compatibility of alternative pesticides, primarily insecticides and miticides, with biological control agents or natural enemies such as parasitoids and predators. In general, natural enemies tend to be more susceptible to insecticides and miticides than insect and mite pests. However, fungicides are applied routinely in greenhouses to control both aboveground and belowground fungal pathogens. So how compatible are fungicides with natural enemies? Although fungicides may not be directly or immediately harmful to a specific natural enemy, there may be indirect or sublethal effects, such as delayed development of the prey and natural enemy, delayed adult emergence of the natural enemy or decreased natural enemy survival. There is, in general, less information on the direct (immediate) and indirect (sublethal) effects of fungicides on natural enemies. In fact, both the Koppert and BioBest Side Effects Manual/Guide contain minimal information on the effects of fungicides on many […]
June 12, 2008
All Predatory Mites Are Not Created Equal
Have you ever considered implementing a biological control program in your greenhouse operation? Well, first of all, what is biological control? Biological control involves the release or application of natural enemies including parasitoids (parasitic wasps), predators and pathogens (in this case entomopathogenic fungi and nematodes) into a greenhouse in order to regulate an existing insect or mite pest population. One of the most widely used groups of natural enemies are predatory mites, which are commercially available from most biological control suppliers. There are a number of predatory mite species commercially available that are in the family Phytoseiidae, including Phytoseiulus persimilis, Neoseiulus fallacis, Neoseiulus californicus, Nesoseiulus longipes and Galendromus occidentalis. It is important to understand the behavioral characteristics of predatory mites before implementing a biological control program since behavioral responses to plant volatiles, feeding preferences and dispersal of predatory mites will influence their ability to provide control or regulate different “levels” […]
October 23, 2017
How to Balance Plant Nutrition and pH in Ornamentals
If you want to maintain healthy plants, understanding the relationship between plant nutrition and pH is a good place to start.
October 23, 2017
New Pilot Project for Offshore Unrooted Plant Cutting C…
Four breeders — Ball Horticultural Co., Dümmen Orange, Proven Winners, and Syngenta Flowers — will participate in the initial pilot, which will include greenhouse growing operations in six Latin American countries.
October 21, 2017
Suntory’s Blue Rose ‘Applause’ Now Available to U.S. Fl…
‘Applause’ was originally introduced to the U.S. in 2011, and since then it was been successfully tested and selected to meet new market conditions.
October 20, 2017
Luxflora Paris Trip Offers Insights on Trends Shaping H…
Each year, Luxflora hosts an international trip that allows participants to gain insights on trends and gather inspiration that ultimately will shape and support our industry in many ways. This year’s event took the group to Maison & Objet and Design Week in the City of Lights – Paris, France.
October 19, 2017
AmericanHort’s Main Priorities After Impact Washi…
Now that Impact Washington is over, AmericanHort, with industry support, is looking to continue its focus on tax reform, labor reform, and research and innovation.
October 18, 2017
Leafy Greens Grower BrightFarms Building New 120,000 Sq…
The operation will provide locally grown salad greens and herbs to supermarkets in the Cincinnati, Dayton, and Columbus, OH, metropolitan areas.
October 17, 2017
Petal It Forward Event a Hit for Both Industry Members …
Check out how this year’s Petal It Forward event brought smiling faces to people across the country, including one personal story.
October 17, 2017
14 New Shrubs With Fringe Benefits
What’s popular with shrubs? Consumers want varieties that will give them more return on their investment, in terms of long-lasting blooms and multi-season appeal that lasts from spring until fall and at times stretches into the winter months. Here are 14 new varieties of shrubs and sub-shrubs to consider for your product mix in 2018.
October 17, 2017
NatureFresh Farms Uses Pest-Detecting Dog to Sniff out …
Knowing that many worker dogs are trained to recognize and discover scents associated with drugs or bombs, the company figured it was possible to train a dog to recognize pepper weevil.
October 17, 2017
Rose Rosette Update: Research into Detection and Manage…
Halfway through a five-year, $4.6 million grant to combat rose rosette disease in the U.S., a national research team is encouraged by the amount of information learned, but admits having a way to go before finding how to overcome the deadly problem.
October 17, 2017
Production Technology Conference Tour Attendees See Tec…
AmericanHort’s Production Technology Conference in Dallas, TX, kicked off on Monday, Oct. 10, with a tour of three local production facilities.
October 17, 2017
How One Grower is Battling Botrytis with a New Biologic…
CropKing in Lodi, OH, recently began using a new beneficial fungus in its fight against Botrytis in its greenhouse tomatoes. So far, the results have been promising.
October 16, 2017
TTA Introduces New Transplanter Suited for Smaller Grow…
The PackPlanter S has 16 grippers and a capacity of 10,000 to 20,000 plugs per hour in a small frame.
October 14, 2017
PlantPeddler Hosting Poinsettia Variety Day in December
The event will feature side-by-side comparisons of more than 100 commercial and pre-released varieties from seven breeders.
October 13, 2017
Researchers Continue to Keep Close Tabs on Whitefly
Dr. Lance Osborne of the University of Florida and Dr. Cindy McKenzie of USDA’s Agricultural Research Service are evaluating insecticide efficacy and the impact of product rotations on whitefly biotype populations.