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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Poinsettia Pest Management Pointers 2023: Late Production and the Whitefly “Tipping Point”

It’s that time of year again, when problems early in the crop may have caught up with you. This includes root rots, Lewis mite, and Bemisia whitefly.

Now, you’ll be forced to make a choice with your poinsettia crop. Do you stay the course with a biocontrol program? Or spray for pests? And, as always, the question is “spray with WHAT”?

This post has tips on pest management decision making when it comes to common poinsettia problems in October.

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Is Lowering Fertilizer Right For You?

This guest post was written by Jessie deHaan, Research Technician at Vineland Research and Innovation Centre (Vineland).

*Four chrysanthemum varieties growing side by side at 75ppm (left side of benches) and 250ppm of N (right side of benches) of N in a Vineland trial.*

Economical and high quality plant production has always been a balancing act between fertilizer, light, irrigation and other input costs.

Unfortunately, supply chain issues caused by the pandemic slow-down, and exacerbated by the subsequent war in Ukraine, have negatively affected the global supply of fertilizer and plant nutrients. These supply issues are leading to rising fertilizer prices for growers.

As input costs rise, how can growers respond and save money, while still producing first-rate products?

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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: Early Production 2023

Hopefully you’ve read our previous post on pest management in propagation. Now it’s time to cover poinsettia IPM during early production.

This post will cover the first signs of root rots, as well as whitefly and Lewis mite monitoring and management. As healthy plants are better able to defend themselves from pests and diseases, we’ll also give a quick nutrient refresher.

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REMINDER! GrowON Webinar Thursday July 27th: Comforting Lies and Unpleasant Truths about Pesticide Application

Ever wonder why you spray the label rate of a pesticide, and you just don’t see good control? Does it have to do with your application method? Your crop? Or something to do with the label rate? According to Dr. Jason Deveau, OMAFRA’s Application Technology Specialist, the truth lies somewhere in between…

Join our latest GrowON Webinar on Thursday, July 27th, where Jason discusses the pitfalls behind generating pesticide labels, and how growers of horticultural crops can help improve pesticide efficacy on-farm.

This is a great webinar for growers of greenhouse floriculture, greenhouse vegetable, nursery and cannabis crops.

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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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Upcoming GrowON Webinar: Comforting Lies and Unpleasant Truths about Pesticide Application Methods

This is a great webinar for growers of greenhouse floriculture, greenhouse vegetable, nursery and cannabis crops.

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REMINDER: “Potential Solutions for Parvispinus” Webinar TOMORROW!

Join us for a GrowON webinar tomorrow (Tuesday May 30th) on potential solutions for Thrips parvisipinus from “boots on the ground” folks. This includes technical reps, industry consultants, and extension specialists.

Read on for more information and how to register.

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Upcoming GrowON Webinar on May 30th! “Potential Solutions for Parvispinus: Lessons from the Field”

Webinars on Thrips parvispinus are coming fast and hard lately, as scientists and extension agents try to get you the very latest information on this serious pest of ornamentals and peppers.

Join us for a GrowON webinar next Tuesday on potential solutions for this pest from “boots on the ground” folks. This includes technical reps, industry consultants, an your friendly neighborhood extension specialist in Ontario.

Read on for more information and how to register.

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