When plants come under attack from invading bacteria, viruses or fungi, they mount a two-pronged response, producing both offensive chemicals to kill invaders and defensive chemicals to prevent infestations from spreading. Now, scientists at Stanford have used a type of chemical vaccine to switch on this plant defense system to prevent localized infections from becoming contagions, a possible first step toward helping harvests ward off infections.
Pests are perennial problems in the greenhouse, but as technology continues to evolve, so do various ways of eradicating pests.
The tale of the European corn borer (ECB), Ostrinia nubilalis, is nothing short of interesting. As the name suggests, ECB is a pest of corn and is present in all major corn growing regions in North America and Europe.
The control of pests is essential for greenhouse growers. Most implement an integrated pest management (IPM) program, incorporating both biological and chemical pesticide use.
It’s been almost five years since the cucumber green mottle mosaic virus (CGMMV) was first reported in Greenhouse Canada, but that doesn’t mean growers should be any less vigilant.
We all know what they say about assumptions. When diagnosing crops with little tolerance for damage, it’s important not to let preconceived notions lead you down the wrong path. Here are some common mistakes to avoid making when diagnosing insect and disease issues in ornamentals.
Tip burn in greenhouse lettuce might not be as simple as it sounds.
For plants, sulphur (S) is essential for growth and development. Many forms of S exist in plants. These include: sulphate, the main source of S extracted from soil; amino acids important to plant health; and, other compounds needed for plant defence.
There is increasing interest in Canada and globally in improving nutrient management in floricultural operations. Typically, this involves the constant delivery of lower levels of nutrients during the crop cycle, resulting in the production of plants with quality acceptable to both growers and consumers.
Greenhouse owners are always looking for new ways to increase yields quickly, as well as their return on investment. But soil probiotics and microbial fertilizers are not new.
January 2017 – “The fact is that if we don’t learn how to recycle nutrients and water, we are doomed. We will start dying off from hunger. This is just one approach to prolong our existence on this planet.”
October 2016 – Silicon (Si) is the second most abundant element in the Earth’s crust next to oxygen . It is a major component of plant tissue. It is found in varying concentrations in virtually all living tissue, plants, animals and humans.
Dec. 7, 2011, West Lafayette, IN — A Purdue University scientist and researchers in Japan have produced a new class of improved plant growth regulators that are expected to be less toxic to humans.
Nov. 6, 2009, Buenos Aires, Argentina – Prior research has reported the successful use of a technique termed “light manipulation” to affect plant height in some ornamental plants. Researchers in Argentina have been studying its potential with poinsettias.
Suggestions from growers often find their way into the classroom labs
July 24, 2008 — Since it was first labelled for use on ornamentals in 1982, Bonzi plant growth regulator (PGR) from Syngenta Professional Products has long been regarded as one of the leading PGRs throughout the nursery and greenhouse industries. Through the years, Bonzi has been shown to consistently keep plants uniformly compact, hardy and well proportioned.
For greenhouse operators, managing crop pests can be both time-consuming and costly, with expenses ranging from thousands to millions of dollars annually. In particular, the need to apply specialist biocontrol agents on a regular basis just to manage a couple of targeted pest species has growers yearning for more cost-effective alternatives.
Mites don’t have the best reputation when it comes to the general public but growers pay thousands of dollars every year to get them into their greenhouses. In fact, most of the greenhouse crops grown in Canada are produced with the help of these very small organisms.
If you started out using biological control for whitefly in your poinsettia crop this year, you’ve now reached a crucial tipping point. Based on the size of your Bemisia whitefly population in mid-late September, your populations could end up being too high by November to effectively bring under control. Ultimately, this could affect sales.
Every IPM strategy emphasizes prevention. This includes starting clean and maintaining a resilient pest management program thereafter. The basic principles to achieve this are minimizing pest entry, maximizing plant resistance and using biocontrol to manage the residual pest populations.
The countdown to Grower Day 2019 is on! Last year, Dr. Rose Buitenhuis of Vineland Research and Innovation Centre talked ornamental cutting dips. What are some key steps to a successful dip?
It has been four years since we last surveyed floriculture growers, and in that time, there have been some big changes in the way Canadian growers are using biocontrol.
When it comes to root zone management, water and nutrients most likely come to mind, but there’s one component which doesn’t receive nearly as much attention.
Already established in her retail and wholesale ornamental business, Nadine Stielow, owner of Thiel’s Greenhouses in Bruderheim, Alta., considered a number of crops, examined consumer demand and local supply, then reached out to industry consultants before settling on hydroponic lettuce.
I am sure you know of IPM, which stands for Integrated Pest Management, and you have likely been practising this in your operation for years with success. However, have you heard of IRM?
While recently watching a television special on the great women of ancient Egypt, I was reminded that depictions of containerized plants, specifically non-native trees being transported in large containers, can be traced back millennia. By the fifth century, containerized plants were common, and some fast-growing herbaceous species were grown in containers for use in festivals.
Peat moss is a frequent, major component of potting mixes, but harvest of the material is becoming unsustainable. Not only is peat being removed faster than it can re-form, its harvest and use in potting mix contributes to the release of carbon dioxide into the atmosphere.
Sept. 28, 2017, St. Albert, Alta. – It’s been a pretty good year for peat harvesting in Canada.
October 2017 – A longtime garden favourite, New Guinea impatiens can be an easy growing option for the greenhouse producer as well, with a few simple tips and techniques. That is true of the newer sun loving varieties like Sun Harmony as well.
August 2017 – A wildflower long tamed, growers and gardeners alike love coreopsis for its low maintenance and long life, but this staple still has a few surprises to share.
July 2017 – Growing bedding plants is always a challenge in the sense that over hundreds of varieties and cultivars are grown, nurtured and then sold or marketed to clients or customers.
March April 2017 – Writing about root zones for greenhouse crops has been an important subject for me and I have written a number of articles on this subject in Greenhouse Canada.
January 2017 – Since most farmers start the growing season in December and January, the space at propagators is limited. Up to 48 heads per square metre spacing is not an exception. This results, in most cases, in a vegetative plant with a few tiny hairy roots.
Nov. 2, 2016, Whitby, Ont. – NOA Fisheries is hosting a three-day aquaponics course early next week (Nov 7-9).
Guelph - Ontario’s greenhouse sector has made significant advances in water, nutrient and energy technology to manage the year-round, high-efficiency production of crops like tomatoes, peppers, herbs, berries and a wide variety of green vegetables.
Jan. 15, 2016, Guelph, Ont. — The proposed Waste-Free Ontario Act marks a significant shift in how Ontario considers waste.
Nov. 27, 2015, Toronto — Ontario has introduced legislation that, if passed, would divert more waste from landfills, create jobs and help fight climate change.Currently, Ontario is generating too much waste, and not recycling enough, say government officials.
Sept. 22, 2015, Sumner, WA – The Million Bottle Club has announced its 2015 recipients, recognizing growers who have recycled more than one million plastic water bottles into plant containers.
Feb. 20, 2015, Twinsburg, OH – The company management of Myers Lawn and Garden Group along with Wingate Partners V, L.P. have acquired the Lawn and Garden business from Myers Industries, Inc.
Dec. 9, 2014 — As a bedding plant grower, you prefer to grow the items that are most profitable. Unfortunately, the demand for that item could be limited. We can only grow items that are in demand and work to make them as profitable as possible.
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Landscape Ontario CongressTue Jan 07, 2020
Tropical Plant International ExpoWed Jan 22, 2020
Guelph Organic ConferenceThu Jan 23, 2020
IPM EssenTue Jan 28, 2020