Managing Million Bells: 2019 Updates

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This post was originally written by Sarah Jandricic and Chevonne Carlow in 2017. Updates to the post are in blue.

It’s that time of year again, when baskets of Million Bells (Calibrachoa) are going up in the greenhouse.  Here’s how to deal with and prevent some of their most common issues. Continue reading “Managing Million Bells: 2019 Updates”

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A New Blog is On the Block for Greenhouse Vegetables!

The family of blogs contributed to by OMAFRA staff has just grown by one more!

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The new ONGreenhouseVegetables blog can be accessed here.  I encourage you to share with your clients, friends and stakeholders growing greenhouse vegetables.  By subscribing to the blog (click the “follow” button), you’ll get the latest news and info on greenhouse veggies straight in your inbox, and can leave feedback to help drive the direction of the blog.

Knowledge About Nematodes: Free Webinar!

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Entomopathogenic nematodes infecting a thrips pupa. Photo courtesy of R. Buitenhuis.

New to nematodes and want to know how they can be successfully used to control thrips, fungus gnats and other pests?  Already using them, and want to get the most out of this IPM tool?  Then check out this webinar from GrowerTalks on Thursday December 13th at 1pm (EST).  

Here, the popular U.S.-based consultant Susanne Wainwright and experts from BASF will discuss Nematode 101 as well as current research and the efficacy of different formulations.   I highly encourage you all to check it out!

2018 Poinsettia Wrap Up: Whitefly and Pesticides

Bemisia 4_SJAs suspected, it’s turned out to be a heck of year for Poinsettia.  Many growers faced Erwinia, others had rooting issues, and all faced significant pressure from Bemisia whitefly from infested cuttings.

As the time approaches for the plants to go out the door, this post covers whitefly control successes/failures in 2018, and what to do with remaining populations.

Whitefly and other poinsettia issues are also being discussed at the Niagara Poinsettia Open House on Tuesday, November 20th. This will take place at Jefferys Greenhouse (Plant II) starting at 10 am.  See the latest issue of Greenhouse Canada Magazine for more information (pg. 28). Hope to see many of you there.

Continue reading “2018 Poinsettia Wrap Up: Whitefly and Pesticides”

Which Thrips are in Your Flower Crops (Part II): How to ID and Control Onion Thrips

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Thrips tabaci, or Onion thrips. Photo courtesy of Thrips-ID.com.

If you were at the Canadian Greenhouse Conference (or are regularly reading this blog!) you’d know we’ve recently identified Onion thrips as a pest of floriculture crops in Ontario (see this post).

Outside of Ontario?  Well, this still may apply to you, as a recent study in France also indicated that up to 47% of pest thrips in floriculture greenhouses were Onion thrips.  So, this issue could be wide-spread.

My last post covered the extent of the problem in Ontario’s industry.  This post will help you identify if YOU are dealing with Onion thrips (OT) along with Western flower thrips (WFT), and what to do about it.

 

Continue reading “Which Thrips are in Your Flower Crops (Part II): How to ID and Control Onion Thrips”

Which Thrips Are in Your Flower Crops: When Paradigms Shift (Part 1)

WFT on hibiscus_Caitlin McDonald_1Up until this point, most of Ontario floriculture growers (and me!) assumed the only pest thrips we were dealing with was Western flower thrips (besides Echinothrips in a few crops like gerbera and poinsettia).

But a survey conducted in major commercial operations in 2016-2017, AND recent outbreaks of serious damage have proved us wrong. (You know what they say about assuming!). Keep reading to find out the truth about thrips! Continue reading “Which Thrips Are in Your Flower Crops: When Paradigms Shift (Part 1)”

The “Tipping Point” for Whitefly Control in Poinsettia

Picture1If you started out  using biological control in your Poinsettia crop this year, you’ve now reached the crucial tipping point for whitefly control decisions.

Based on the size of your whitefly population in mid-late September, your populations could end up too high by November  to effectively control.  Ultimately, this could affect sales.

So, do you keep going, and hope for the best?  Or switch horses mid-stream, and start using chemicals?  To help you determine which is the right call, keep reading.

Continue reading “The “Tipping Point” for Whitefly Control in Poinsettia”