A Grower’s Guide to On-Farm Trials

*An on-farm trial comparing different brands, types and colours of sticky traps done by OMAFA.*

This is a guest post written by Jessie deHaan (M.Sc.; Research Technician, Biological Crop Protection at Vineland Research and Innovation Centre).

Now that it’s halfway through spring bedding plant season, you may be considering changing some of your current IPM or production practices for next year that just aren’t working as well as they could. Conducting on-farm trials is an easy way to evaluate how well a new product, process or technology will work in your operation.

Before making any large-scale changes, it is important to test things on a small scale first. Read on to learn how you would go implementing a small on-farm trial to get you results that are meaningful.

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Which Microscope Should you Buy for Your Greenhouse?

With new invasive species popping up, the need for growers to more closely inspect pests and damage is at an all time high. This has led to interest in on-farm pest identification.

When it comes to thrips identification, specifically, investing in a microscope is a necessary evil. But a decent microscope is now a LOT cheaper than it used to be. Here, we’ve provided a video to walk you through what features to look for.

The full post will also provide you with model numbers and links, to make microscope shopping easier!

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Garden Mum Refresher 2025: Managing Nutrients, Size Tracking, and PGRs

This post was contributed to by OMAFA’s Greenhouse Floriculture Production Specialists past and present: Kathryn Russell, Abigail Wiesner, and Dr. Chevonne Dayboll.

As we feel temperatures rising, summer is on its way – and so are garden mums! Although generally an easy crop, there are several tweaks you can make to help save headaches AND money. This post has updated information to help you optimize your nutrient management and growth regulation/tracking in garden mum production.

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Strategic Solutions for Substrate Success!

This post was originally written by Abigail Wiesner, Acting Greenhouse Floriculture Production Specialist.

For the last few decades, growers in North America have been reading headlines about the steady decline of peat used for horticultural purposes across multiple European countries. With Canadian sources of peat, and trade primarily between the United States, local growers haven’t been severely affected by global changes in peat use and reduction trajectories.

Even though Canadian growers haven’t seen the same reduction of peat use in the local market, it doesn’t mean we can’t learn from Europe’s goals, decisions, and success stories.

Read on to learn about the benefits of trialing new components for your media mixes.

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In Case you Missed it, GrowON Presents: How to use Light Spectral Combinations to Steer Plants

In case you missed the recent GrowON presentation on July 22nd, by Dr. Youbin Zheng (University of Guelph) we’ve now uploaded to YouTube!

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Trap Plants as a Tool Against Thrips parvispinus in Tropicals

*Sweet alyssum (Lobularia) as a trap plant for T. parvispinus.*

Thrips parvispinus has become a serious pest of tropical ornamental crops in North American since 2020. Due to the severity of the damage, IPM strategies are needed to complement chemical control until an effective and economical biocontrol program can be developed for this pest.

Mass trapping through traps, lures, or trap plants can be an effective strategy for thrips. We’ve already seen that mass trapping cards REALLY help with this pest (more on that, later). And, it seems that trap plants may also be an effective strategy when used properly in vegetative crops.

Read on for what we did and how to implement it on YOUR farm.

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Scientific Research and Experimental Development (SRED) tax incentives

This post was originally written by Abigail Wiesner, Acting Greenhouse Floriculture Production Specialist.

Are staff at your greenhouse conducting research, solving problems, and promoting development on site? Then you may be eligible for a tax incentive!

Read more about the SRED program and how you can participate.

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Pesticides for Parvispinus: Results of an On-Farm Trial

*Female T. parvispinus (left) on a mandevilla flower; a smaller male (yellow, right) can also be seen.*

Although the invasive pest Thrips parvispinus continues to threaten tropical ornamental crops, the good news is that the sky isn’t falling. Producing crops like mandevilla, schefflera and hoya is still possible, at least in a closed greenhouse setting.

Although developing a reliable biological control program for this pest is probably a few years off, a suite of pesticides is available in the U.S. and Canada to successfully manage T. parvispinus.

This post covers these pesticides, their relative efficacy and demonstrates outcomes when used in an 8 month on-farm trial in mandevilla.

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The Whitefly “Tipping Point”and Testing Pesticides in Poinsettia

It’s that time of year again where you have to make a choice with your poinsettia. Do you stay the course with natural enemies, or abandon your bio program and spray for whitefly? And spray with WHAT?

This post has tips on how to test pesticides NOW, so that when it comes down to the wire, you’ll know what is – and isn’t – working.

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Poinsettia Problems 2020: The “Tipping Point”and Testing Pesticides

This post has tips on how to test pesticides NOW, so that when it comes down to the wire, you’ll know what is – and isn’t – working.

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