What you NEED TO KNOW about Thrips and Whitefly Control: September Update

thrips and whiteflyIt’s that time of year again where two of our biggest crops cross over: fall pot mums and poinsettia. This means growers have to simultaneously keep an eye on the two biggest pests in the industry: thrips (usually western flower thrips) and Bemisia whitefly.

Here’s how things are shaping up with these pests and where they might be going.

Continue reading “What you NEED TO KNOW about Thrips and Whitefly Control: September Update”

Now’s the Time for Whitefly Prevention: Registered Products for Poinsettia Dips

OLYMPUS DIGITAL CAMERAHere in Canada, we’ve been talking for years about research on the highly effective method of dipping your poinsettia cuttings in low-risk pesticides to reduce starting whitefly populations

Thanks to Dr. Rose Buitenhuis (VRIC), Cary Gates (FCO) and BioWorks, the label for BotaniGard WP has now officially been expanded to include dip applications.  This now adds to our arsenal (see below for more dip products).

Read on for the current BotaniGard label and how dipping can help improve your Bemisia whitefly program this year, whether you’re using pesticides or biocontrol.

Continue reading “Now’s the Time for Whitefly Prevention: Registered Products for Poinsettia Dips”

A new (biological!) tool to tackle Japanese Beetle.

See the original post by Jen Llewellyn at ONnurserycrops.wordpress.com. 

japanese beetle_dave

Japanese beetles attack ornamental plants and make shipping out of Ontario more difficult.

It’s almost that time of year again – time for Japanese beetles to begin their flight and make exporting ornamental plants from Ontario more difficult.

But this year, we have a new biological insecticide is available for managing both the larval and adult stages of Japanese Beetle. 

Read more on it’s use and availability.

Continue reading “A new (biological!) tool to tackle Japanese Beetle.”

Updates on Ornamental Disease Webinar Series, “Let’s Talk Disease”.

Screen shot of advertisement for the first webinar in the series, featuring John Lea-CoxWe are ecstatic to report that the webinar series “LET’S TALK DISEASE”  hosted by Greenhouse Canada Magazine and OMAFRA has had high interest and participation from growers.

Running from March to late April, this series covers topics from sanitation measures, to the most effective fungicides for persistent pests like powdery mildew.

Keep reading for and UPDATED list of dates and exciting speakers, and how you can view presentations you might have missed

Continue reading “Updates on Ornamental Disease Webinar Series, “Let’s Talk Disease”.”

Poinsettia Prep Refresher

JF14Now 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”

Powdery Mildew Being a Pain? Effective Products for PM Relief.

PMRoses4

Powdery mildew on cut roses in Ontario.

With May’s weather continuing to be up and down, humidity control is a problem in the greenhouse, meaning Powdery Mildew (PM) is too.  This pest is rearing it’s ugly head in crops like Kalanchoe and Dahlia.

We won’t cover the basics of PM here:  biology, spread and prevention were covered in a previous post.  Instead, we’ll focus on monitoring, and which control products to use once you’ve found an infection.

This post was written with help from Plant Pathologist Ann Zemke of the Chase Research Group.

Continue reading “Powdery Mildew Being a Pain? Effective Products for PM Relief.”

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

DSC_1230

Wilting  of a poinsettia plant on a bench of otherwise healthy plants could be Pythium root rot. But then again, it might not…

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 may be considered the most “likely” culprit in Poinsettia in this area, but this isn’t always the case, and misdiagnosis can mean wasted fungicide applications. Read on for a list of likely suspects and appropriate control measures.

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