Saving “Bank” with Banker Plants

This guest post was written by Ashley Paling, a research technician at the Horticulture & Environmental Sciences Innovation Centre (HESIC) and part-time instructor at Niagara college.

Banker plants can be an effective part of a greenhouse IPM program.

Using biological controls to control aphids as part of an IPM strategy is a popular choice among growers (Jacob, 2023). Aphid parasitoids can, of course, be purchased weekly from suppliers. However this is an expensive option that leaves you at the mercy of waiting for weekly deliveries to control your greenhouse pests.

Enter the Banker Plant System: a relatively inexpensive option that provides you with a constant supply of beneficial biological controls. This article covers the ins and outs of how to use a banker plant system properly, and what you need to consider if you are going to set up a banker plant program in your greenhouse.

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Introducing Ontario’s Crop Protection Hub – Your One Stop Shop for Pesticide Information for Greenhouse Crops

Are you a Canadian floriculture grower Planning your IPM program for Spring crops soon? Then look no further! Ontario’s new Crop Protection Hub combines pesticide data from a plethora of sources and combines them into one convenient location.

Types of data (for both chemical and microbial insecticides/fungicides) include:

Allowable pesticides by crop type (e.g. cut flowers, potted crops, unrooted cuttings)
Rates, REIs, and maximum allowable sprays per crop
Compatibility information with beneficial organisms
Efficacy ratings of pest management products for specific greenhouse pests
Recommendations for best use of products for each pest
Link to the most current pesticide label

Keep reading to find out how to access this new application.

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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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Got Tropicals? How to Detect and Monitor for Thrips parvispinus.

*Figure 1.* Thrips parvispinus female. Photo by A. Summerfield, Vineland.

In a previous blog post, we talked about which pesticides can control Thrips parvispinus if you end up with an infestation from imported plant material.

But how do you figure out if this invasive pest is in your facility in the first place? And, if so, what’s the best way to monitor their populations?

After working with this pest for the last 1-2 years, researchers like myself have figured out which monitoring methods are most effective. This can help you identify the problem early, begin a management plan, and monitor the efficacy of your controls.

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Poinsettia Pest Management Pointers 2023: Receipt Through Potting Up.

Poinsettias are here! In the next few posts we’ll be breaking down production into into 4 key growing periods: Receipt/Propagation, Early Production, Late Production, and Finishing.

This post on propagation will cover things you can do now to treat pests and diseases in your cuttings to prevent BIG problems later. And make sure to check out Dr. Chevonne Dayboll’s previous post on ensuring cutting quality.

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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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Cleaning Out Your Greenhouse Today can Save You Pest and Disease Headaches Tomorrow.

Now that Victoria Day weekend has come and gone, many floriculture greenhouses find themselves with a rare period of empty compartments or benches before fall crops go in. Similarly, many vegetable greenhouses extending their growing period are facing their first crop clean out. Now is the perfect time to consider a thorough cleaning of your greenhouse to prevent pest issues going forward into the new crop. But this can seem like a daunting task.

OMAFRA and the Vineland Research and Innovation Centre have produced a how-to video on greenhouse clean-out and disinfection that can help you know where to start.

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Thrips parvispinus (“Pepper Thrips”): The Importance of Inspecting Plants and Dipping Cuttings from Florida

I’ve written about the tropical pest Thrips parvispinus, now being called “pepper thrips”, infesting certain tropical ornamentals in Canada before. But it appears this pest has become widespread in Florida.

As Ontario sources much of its plant material from Florida, it’s a good idea to exercise caution, even on non-tropical plants. The known host range of this pest is evolving, and thrips have the potential to hitch-hike on less-preferred plant hosts and spread to more preferred hosts in your greenhouse.

Read on for information on the situation in Florida and what you can do to help protect your greenhouse from this pest.

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Should you Tank Mix Your Pesticides? The Answers are “Mixed”.

Will tank mixing pesticides give you better efficacy? Save you money? Can tank mixing HURT your crop in any way? How do you know if two products are compatible? And, how do you know if you’re legally ALLOWED to tank mix two products?

This post covers all these questions and more, with some great links to other resources to boot!

This article was written by Jason Deveau (OMAFRA Application Technology Specialist) and Mike Cowbrough (OMAFRA Weed Management Specialist – Field Crops). The original post can be viewed on the Sprayers 101 website. New guidance on Health Canada’s federal tank mixing policy can be found here.

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GrowON Webinar “Squeaky Clean Start to 2023” Now Available on Demand.

Getting off on the right foot in the new year is important personally AND in your greenhouse, especially when it comes to pest management.

Two of our Canadian greenhouse experts gave some great talks on where, when and how to sanitize in your greenhouse to avoid pest outbreaks, and new research findings on dipping vegetative cuttings to reduce incoming pests.

If you missed this webinar last week, see how you can watch a recoding of this Grow ON Webinar, below.

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