Up 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)”
If 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”
Now that poinsettias are safely tucked into their prop trays and the threat of Erwinia (Pectobacterium) is almost over, it’s time to think about other Poinsettia issues.
Root rots, nutritional issues, environmental stress and PGR mistakes can all be costly in this high-value crop. Read on for common pitfalls and how to avoid them.
Continue reading “Poinsettia Prep Refresher”
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.”
IPM in potted mums can be challenging at times, but Ontario has lots of strategies for thrips control in this crop.
New to a thrips biological control program for chrysanthemums, or just need a refresher on the most effective strategies currently being used in the industry? Then watching the Greenhouse Canada Webinar, “Tips for Thrips Control: From Propagation to Pocketbook” is a good place to start.
Keep reading for the webinar link and some chrsysanthemum IPM tips for 2018.
Continue reading “May IPM Refresher: Effectively Controlling Thrips in Mums”
Weekly-mum producers have seen higher-than-normal spider mite levels coming in on cuttings from the U.S. recently. This might impact seasonal potted-mum growers as well.
Here’s some tips and tricks on two spotted spider mite control within a chrysanthemum IPM program.
Continue reading “LOOK OUT! Here comes the Spider Man! (Oops. I mean Mites. Spider mites. Sorry; way less exciting).”
Although native bees and honeybees may just be starting to gather strength and are beginning to fly outside, other “B’s” have been of growing concern in the greenhouse for some time now.
These include common spring bedding crop problems like Botrytis cinera (aka grey mold), Broad mites, and leaf burn (from a variety of causes).
Keep reading for tips on how to manage these issues during this time of year.
Continue reading “It’s “B” Season! Watch for Botrytis, Broad Mite and Burn.”