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”

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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”

Japanese beetles are in flight! WHAT and WHEN to spray.

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Japanese beetle (Popillia japonica) adults were spotted flying on June 29 (2018) in Ontario!

The Japanese beetle season is upon us once again!  Adults were spotted this week in Southern Ontario.

Shipping outside Ontario or need to meet the requirements of the JB Certification Program? Not sure what’s required?

This post contains a treatment “decision tree” and a JB product “cheat sheet” to help growers of greenhouse ornamentals.

Continue reading “Japanese beetles are in flight! WHAT and WHEN to spray.”

Worried About Whitefly? Control Strategies in Poinsettia for 2018.

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Bemisia whitefly (Bemisia tabaca) adults on poinsettia.  In high pressure years, poinsettia plants can quickly become unsellable due to this pest.

The floriculture industry in Ontario seems to have mostly avoided heavy aphid AND thrips pressure this spring/summer.  But from everything I’ve been hearing, we are NOT going to be that lucky with whitefly on poinsettia this year.

 

This  post goes over preventative measures that should be taken as soon as cuttings come in the door, biocontrol programs for whitefly on poinsettia, and WHEN and WHAT to spray for this so you can avoid resistance issues.

Continue reading “Worried About Whitefly? Control Strategies in Poinsettia for 2018.”

Exporting to a JB-free Zone? Proper Pesticide Timing for Japanese Beetle Control in Ontario.

japanese beetle_daveNavigating the guidelines for exporting plant material out of a Japanese Beetle (JB) zone such as Ontario can be tricky business, especially with upcoming changes to the Greenhouse-Grown Plant Certification Program (GCP; formerly CGCP).

Also not helping is the general lack of information out there regarding proper timing of JB control products. For example, did you know that NO products are considered effective between May 15 and June 15?  This could create problems if you’re  shipping outside Ontario in the next month and haven’t treated yet.

To make things easier, I’ve created a treatment “decision tree” and a JB product “cheat sheet” for growers of greenhouse ornamentals.

Continue reading “Exporting to a JB-free Zone? Proper Pesticide Timing for Japanese Beetle Control in Ontario.”

The New Era of Pesticides in Canada: Cancellations, Re-evaluations, and New Products

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Changes will soon be coming to some of the chemical products you rely on most.

It seems  there is never a dull moment in the greenhouse ornamental industry these days.  From transitions to new crops,  new export requirements, to novel pest problems, the industry has seen a lot of change….and it’s not over yet. 

The industry is also going to be facing changes regarding some commonly used chemical products. Here is the latest on potential  revisions to the list of chemical tools we have access to in Canadian floriculture.

This is guest post was written by Cary Gates, Pest Management Director at Flowers Canada Growers.

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Upcoming IPM Workshop in Niagara: Achieving Sustainable Biocontrol in Floriculture

HandlensFeeling a bit lost when it comes to pest management? Searching for advice on how to achieve a sustainable, long-term biocontrol program for your operation?

Then mark your calendars for February 23rd! A new IPM Workshop is here. Read on for details.

Continue reading “Upcoming IPM Workshop in Niagara: Achieving Sustainable Biocontrol in Floriculture”