New Virus in Greenhouse Crops: Important Info Sessions Available Tues and Thurs

ToBRFV is a new virus on the greenhouse scene.

A new, potentially serious plant virus – the Tomato Brown Rugose Fruit Virus – is moving through crops across Europe and the U.S.  As this virus can affect both tomatoes, peppers, and potentially some floral hosts, OMAFRA is running information workshops in Niagara and Leamington to answer grower questions about potential threats to our industry.

Read on for a description of the virus and workshop dates.

Continue reading “New Virus in Greenhouse Crops: Important Info Sessions Available Tues and Thurs”

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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”.”

Webinar Series on Ornamental Disease Control Starts March 14!

Mar 14 Cultural Controls Webinar ArtRankled by root rots? Mystified by mildews? Bothered by Botrytis? We’re here to help!

Greenhouse Canada Magazine and OMAFRA are proud to be co-hosting a webinar series on ornamental disease control.  Running from March to late April, this series covers topics from sanitation measures you should be adding to your management program, to the most effective fungicides for persistent pests like powdery mildew.

Keep reading for our list of dates and exciting speakers.

Continue reading “Webinar Series on Ornamental Disease Control Starts March 14!”

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.

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

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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.”

It’s “B” Season! Watch for Botrytis, Broad Mite and Burn.

Honeybee 2Although 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.”

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

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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.”