GrowON presents: How to Use Light Spectral Combinations to Steer Plants

Exciting new research from Dr. Youbin Zheng (University of Guelph) explores how plants respond to different light spectra and spectral combinations.

This GrowON talk was on July 22nd 1:00-2:30 p.m. EST in-person at Ontario Greenhouse Vegetable Growers (OGVG) and online.

Learn more about how to apply spectral variations to a diverse set of crops by accessing the recording and presentation files below.

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Effect of Light Abatement Curtains on the Greenhouse Environment

Information on how light abatement curtains can be used and their effect on the greenhouse environment.

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POSTERITY® Fungicide label expanded via Minor Use Program

POSTERITY® Fungicide label expanded via Minor Use Program to help manage Fusarium internal rot on Greenhouse Peppers and Botrytis grey mould on Greenhouse Lettuce

Written by Josh Mosiondz, Minor Use Coordinator, OMAFRA

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for POSTERITY® Fungicide for suppression of Fusarium internal rot on greenhouse pepper and Botrytis grey mould on greenhouse lettuce in Canada. POSTERITY® Fungicide was already labeled for disease control on a wide range of crops in Canada. These minor use proposals were submitted by Agriculture & Agri-Food Canada, Pest Management Centre (AAFC-PMC) as a joint project with the United States Department of Agriculture (USDA) IR-4 project as a result of minor use priorities established by growers and extension personnel.

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GrowON Lunch and Learn: Dynamic LED Lighting and the Circadian Rhythm

Access the recording and presentation from the GrowON lunch and learn that occurred on May 12, 2023 (12:00-1:00 PM EST) in person and online to learn about the effect of dynamic LED lighting on the circadian rhythm of crops.

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Carbon Dioxide (CO2) Enrichment in Controlled Environment Agriculture – Is it always a good idea?

Authors:

Dr. Fadi Al-Daoud (Greenhouse Vegetable Specialist, Ontario Ministry of Agriculture, Food and Rural Affairs, Harrow, ON)

Dr. Xiuming Hao (Research Scientist, Agriculture and Agri-Food Canada, Harrow, ON)

Table of contents:

  1. Introduction
  2. What is CO2?
  3. CO2 Enrichment and Plant Physiology
  4. CO2 Enrichment and High Light and Heat
  5. So, is CO2 enrichment always a good idea?
  6. References
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GrowON Lunch and Learn: Autonomous Greenhouse – Improving Production and Sustainability

Enjoy this recording of the GrowON lunch and learn that took place in person at Ontario Greenhouse Vegetable Growers and online (March 20, 2023) and learn more about autonomous growing technologies.

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GrowON Webinar: Greenhouse Dehumidification – a tool for dealing with the carbon crisis

We hope you enjoy this recording of the GrowON webinar about greenhouse dehumidification with Dr. Jeanine West, environmental specialist with Flowers Canada (Ontario) and Marco de Leonardis (Freeman Herbs).

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Managing Nighttime Greenhouse Light Emissions

Nighttime greenhouse light emissions. Photo credit – Benjamin Snow, University of Guelph.

Author: Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA)

An increase in the use of supplemental lighting in greenhouses has been accompanied with an increase in the amount of light emitted from greenhouses at night during fall and winter months. Without proper management strategies, light emitted from greenhouses during nighttime hours can potentially be disruptive to neighbouring residents. As a result, the objective of this document is to outline the latest research in greenhouse light management for producers and to provide information on managing nuisance complaints should they arise.

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