Crop Protection
Basil downy mildew is a relatively new disease of both field and greenhouse basil in Ontario. The disease requires diligent management in the greenhouse. Diseased plants that enter from the field or garden can contribute to epidemics if weather conditions permit. The incidence of diseased plants in retail locations has decreased in the past few years due to better management in greenhouses.
The Pest Management Regulatory Agency (PMRA) recently announced the approval of an URMULE (user requested minor use label expansion) registration for Milstop foliar fungicide for suppression of powdery mildew on field and greenhouse mint in Canada.
The Pest Management Regulatory Agency (PMRA) recently announced the approval of URMULE (user requested minor use label expansion) registrations for Confine, Rampart and Phostrol Fungicides for suppression of downy mildew and pythium root rot on greenhouse-grown basil in Canada.
Pythium species are fungal-like organisms (Oomycetes), commonly referred to as water molds, which naturally exist in soil and water as saprophytes, feeding on organic matter. Some Pythium species can cause serious diseases on greenhouse vegetable crops resulting in significant crop losses.
Horticultural crops in Canada, although grown on a smaller acreage than field crops, are of increasing importance to the agricultural economy. Greenhouse tomato production in Ontario contributes over $354 million annually, but insect and spider mite pests reduce the yield of the tomato crop and are the target of many management programs.
From October 4, 2017 to January 8, 2018, a research project was conducted at the Niagara College, Niagara-on-the-Lake greenhouse to evaluate the efficacy of Silamol, a silicon product designed to help reduce the negative impact of biotic and abiotic stress in plants.
The human eye feeds 10 million bits per second to the brain, but when workers walk a greenhouse to check plants there’s only so much info they can take in, let alone absorb. Often, they’ll conduct spot checks and make decisions based on what they see.
In a controlled environment, supplemental lights are often used to increase crop growth. But could they also be used for other purposes?
Greenhouse growers need to be rigorous managers if they want to stay ahead of aphids and mealybugs.
Palladium fungicide was recently approved for a minor use label expansion in Canada. But what does that mean?
Japanese beetles have been recently spotted in southern Ontario. 
It seems there is never a dull moment in the greenhouse ornamental industry. From transitions to new crops, new export requirements to novel pest problems (I’m talking about YOU, mealybug!) the industry has seen a lot of change lately. And it’s not over yet.
The disease triangle is a concept used by plant pathologists to explain factors necessary for disease to occur. Disease will only occur when a virulent pathogen is present, the plant is susceptible to the pathogen and the environment is conducive for disease. If one of the three components is absent, then disease will not occur. That is why when we think about preventing plant diseases, we should keep the disease triangle in mind. Ask ourselves, which parameters can we control?
September 2017 – Ontario has long been a world leader in the adoption of biocontrols in floriculture crops.
September 2017 – One thing is for sure these days: nothing is for sure. Everyone in the greenhouse industry knows we’re in a global industry. Supplies, labour and produce are increasingly moved around the world in what we’re told is a good thing – “global trade.”
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