LUNA PRIVILEGE GREENHOUSE® Fungicide label expanded via Minor Use Program to help manage Botrytis blight and Powdery mildew on Greenhouse and Outdoor Ornamentals and Suppression of Powdery Mildew on Rose in Canada

This post was originally published on the ONnurserycrops blog by Cassie Russell, Nursery and Landscape Specialist for OMAFA.

Commercial ornamental growers now have another tool in the toolbox thanks to the Minor Use Program. LUNA PRIVILEGE GREENHOUSE^® Fungicide label has been expanded to help growers manage powdery mildew and botrytis in greenhouse and outdoor ornamental crops. Continue reading below for an abbreviated outline of the new label.

Continue reading →

Points for Points! Production Pointers for 2024 Poinsettias

This post was contributed to by Abigail Wiesner, Drs. Sarah Jandricic, and Chevonne Dayboll.

Christmas in July? Not quite, but poinsettias are making their way into greenhouses across Ontario, and they always arrive at the hottest time of the year.

Nutritional issues, environmental stress, PGR mistakes and early diseases can all be costly in this high-value crop. Read on for common pitfalls and how to avoid them, as well as links to pest management information in early production.

Continue reading →

Poinsettia Pest Management Pointers 2023: Late Production and the Whitefly “Tipping Point”

It’s that time of year again, when problems early in the crop may have caught up with you. This includes root rots, Lewis mite, and Bemisia whitefly.

Now, you’ll be forced to make a choice with your poinsettia crop. Do you stay the course with a biocontrol program? Or spray for pests? And, as always, the question is “spray with WHAT”?

This post has tips on pest management decision making when it comes to common poinsettia problems in October.

Continue reading “Poinsettia Pest Management Pointers 2023: Late Production and the Whitefly “Tipping Point”” →

Poinsettia Pest Management Pointers: Early Production 2023

Hopefully you’ve read our previous post on pest management in propagation. Now it’s time to cover poinsettia IPM during early production.

This post will cover the first signs of root rots, as well as whitefly and Lewis mite monitoring and management. As healthy plants are better able to defend themselves from pests and diseases, we’ll also give a quick nutrient refresher.

Continue reading →

Poinsettia Problems: Your Monthly Scouting Guide, 2021

JF14 — *This post on poinsettia problems was contributed to by Drs. Chevonne Dayboll and Sarah Jandricic.*

When poinsettias get problems, they always seem to hit hard and fast. Things like whitefly, Lewis mite, root rots, and nutritional issues can all quickly derail a quality crop. This is why scouting might be more important in this crop than any other.

Here’s a month by month guide on what you should be looking for to prevent small problems from becoming big issues.

Continue reading “Poinsettia Problems: Your Monthly Scouting Guide, 2021” →

Poinsettia Problems: Your Monthly Scouting Guide

Here’s a month by month guide on what you should be looking for to prevent small problems from becoming big issues.

Continue reading “Poinsettia Problems: Your Monthly Scouting Guide” →

99 Poinsettia Problems: Your Monthly Scouting Guide

Okay, so Poinsettia don’t really get that many problems. But when issues arise, they can hit a crop fast and hard. Whitefly, Lewis mite, root rots, and nutritional issues can all quickly derail a quality crop.

Here’s a month by month guide on what you should be looking for to prevent small problems from becoming big issues.

Continue reading “99 Poinsettia Problems: Your Monthly Scouting Guide” →

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

Honeybee 2 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.” →

Botrytis Bumming You Out?

BotrytisPrimula3 — Botrytis spots on Primula petals.

With the intense period of rain we just had, and with MORE rain coming on Friday, it’s time to think about Botrytis control and prevention. One of the most common and destructive diseases of greenhouse crops, outbreaks usually follow periods of cool, damp, cloudy weather. Unfortunately, I can’t order up more sun for you, but I CAN suggest some management tactics.

Continue reading “Botrytis Bumming You Out?” →