Author Archives: Sarah Jandricic, Greenhouse Floriculture IPM Specialist, OMAFRA

Controlling Echinothrips in Ornamentals without Pesticides: News from the Netherlands.

Echinothrips americanus is an interesting pest in Ontario.  An occasional pest of little concern for some, its presence often plagues others (i.e. cut flower growers). The greenhouse research team at Wageningen University & Research has been working to find reliable, effective biocontrol  strategies for … Continue reading

Posted in Pest control strategies, Predatory mites, Thrips | Tagged , , , | Leave a comment

When a Worm Isn’t a Worm at All: “Pot Worms” – A Special Kind of Gross.

An Entomologist by training, it generally takes a lot to gross me out. (I’m constantly suppressing shrieks of “It’s adorable!” when growers show me aphids).  But now that it’s dark and wet in the greenhouse, there’s been a sudden appearance … Continue reading

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Reminder: Poinsettia Trial Open House THIS Wednesday!

When: Wednesday Nov 22, 9:30am – 3pm: Ontario Poinsettia Trials Where: Jeffery’s Greenhouses – Plant 2 (2411 Fourth Ave., Jordan, ON). Why You Should Go: Along with a demonstration of new cultivars grown under Ontario conditions (to help you to decide for 2018), there … Continue reading

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Upcoming Workshops: The Value of Doing Your OWN Trials, and Poinsettia IPM.

One thing our industry excels at is having numerous industry experts and growers willing to share and discuss their knowledge. Here’s a profile of some upcoming events relating to Greenhouse IPM you can take advantage of.

Posted in Bemisia whitefly, biological control, costs, biological control, IPM tools, News, On Farm Research, Poinsettia, Whitefly | Tagged , , , , | Leave a comment

2017 Update: 4 Ways You May Be Killing Your Predatory Mites, and How to Check!

Note: This is a re-post but contains important information on use of DDVP (dichlorvos) with mite sachets. (See point 4!) In 2017, I had an interaction with a grower where their long-standing biocontrol program for thrips suddenly seemed to be … Continue reading

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Fainting “Freedom Red”? Wilting “Whitestar”? Potential causes of Poinsettia collapse, solutions, and the importance of testing.

From now until mid-November is when you’ll most likely see plant losses in poinsettia due to severe wilting. These losses can be considerable: anywhere from 2-15% in Niagara operations in past years, with disease pressure seeming especially high this year. Pythium … Continue reading

Posted in biopesticides, diseases, Fungal diseases, Fungicides, Poinsettia, Pythium, Thielaviopsis | Tagged , , , , , | 1 Comment

Attention IPM Scouts: a brief guide to hand lenses.

Ever wonder if you’re using the best hand lens for the job to investigate pests in your greenhouse?  Curious about the pros/cons of different styles?  Then read the following post from our friends at Penn State: http://sites.psu.edu/frost/2017/09/05/a-brief-guide-to-hand-lenses/

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