Where Do Most of Your Thrips Come From? The Answer May Surprise You.

Are your thrips numbers on the rise?

(This post was co-written by S. Jandricic and A. Summerfield.)

Sometimes your thrips biocontrol program is working great. Other times, it seems to get completely overwhelmed.  Thrips often get out of control in Summer, when fall crop production is ramping up. But why is this?

Several factors can contribute to rising thrips numbers, but the major reason involves HOW and WHEN thrips like to invade your greenhouse. Read on to learn about this, and what you can do to stay on top of thrips this summer!

Continue reading “Where Do Most of Your Thrips Come From? The Answer May Surprise You.”

Tropical Thrips Species Intercepted on Plant Material in Ontario: Be Aware – But Don’t Panic.

This post was co-written by A. Summerfield (Vineland Research and Innovation Centre) and S. Jandricic.

Figure 1. Thrips parvispinus is generally dark coloured (though the head and thorax can be lighter than the abdomen), has bright red ocelli and clear patches at the top of its wings.

Increases in global trade, along with decreased use of harsher broad-spectrum pesticides makes it easier for insect species to move around the world. Because of this, it is becoming more common to find unusual pests coming in on plant material. It’s important that we are prepared and know what to do when something like a new thrips species makes an appearance.

The tropical thrips species Thrips parvispinus has been popping up in various parts of the globe in recent years and was intercepted on plant material in two Ontario greenhouses in 2021/2022. Read on to learn what we know about this species and what you should do if you suspect you have them.

Continue reading “Tropical Thrips Species Intercepted on Plant Material in Ontario: Be Aware – But Don’t Panic.”

Poinsettia Pest Management Pointers: Receipt Through Potting Up.

Poinsettias are almost here! Instead of covering the whole crop cycle, this year we’re breaking posts down into 4 key growing periods: Receipt/Propagation, Early Production, Late Production, and Finishing.

This post on propagation will cover things you can do now to treat pests and diseases in your cuttings to prevent BIG problems later. And make sure to check out Dr. Chevonne Dayboll’s post from last week, on ensuring cutting quality.

Continue reading “Poinsettia Pest Management Pointers: Receipt Through Potting Up.”

REMINDER TO REGISTER: Webinar on Battling Botrytis THIS THURSDAY

Every year, factors like increased cloud cover, rain, poor ventilation, and lack of accessible chemicals can leave growers struggling to control Botrytis cinerea (otherwise known as grey mould) in their crops. Our next GrowON webinar speaker has spent an entire PhD trying to bring you better solutions to an old problem: battling Botrytis.

Read on for more details on the speaker and how to register.

Continue reading “REMINDER TO REGISTER: Webinar on Battling Botrytis THIS THURSDAY”

GrowON 2022 Webinar Series: Battling Botrytis in Covered Crops.

Every year, factors like increased cloud cover, rain, poor ventilation, and lack of accessible chemicals can leave growers struggling to control Botrytis cinerea (otherwise known as grey mould) in their crops. Our next GrowON webinar speaker has spent an entire PhD trying to bring you better solutions to an old problem: battling Botrytis.

Read on for more details on the speaker and how to register.

Continue reading “GrowON 2022 Webinar Series: Battling Botrytis in Covered Crops.”

Battling Broad Mite in Spring Crops

Broad mite, Polyphagotarsonemus latus. Photo credit: USDA BARC

I’ve hearing a lot lately about Broad Mites (Polyphagotarsonemus latus) in spring crops, especially Reiger begonias and New Guinea impatiens. Other crops that are commonly affected include torenia, exacum, ipomea and gerbera.  

Broad mite are often difficult to detect and control. Read on for tips on monitoring and the latest management strategies for this pest.

Continue reading “Battling Broad Mite in Spring Crops”

New Virus in Calibrachoa – Identification and Treatment.

Dark green and yellow mottling symptom on foliage. Photo by Heidi Lindberg, MSU Extension.

Several diagnostic labs in the Northeast U.S., as well as our own lab here at the University of Guelph, have received diseased calibrachoa suspected to have chili pepper mild mottle virus (CPMMoV). The supplier has alerted growers of this issue.

Although CPMMoV is NOT a regulated disease by CFIA or the USDA, it can still affect the quality of your crop and lead to losses.

Read on for a link to an excellent blog post on the topic written by Michigan State University Extension. This includes symptoms to look out for, the importance of testing, and what to do if you have it.

Continue reading “New Virus in Calibrachoa – Identification and Treatment.”

Upcoming Webinar: Root Rots – What You Can’t See CAN Hurt you.

Its a busy time in the greenhouse, but our next topic is timely! Rot rots like Fusarium, Pythium and black root rot are often the bane of spring bedding crops. Dr. Mary Hausbeck, a Distinguished Professor from Michigan State University, is going to share her vast knowledge on this topic, including which fungicides work best. Check out the details below, and don’t forget to register!

Continue reading “Upcoming Webinar: Root Rots – What You Can’t See CAN Hurt you.”

Webinar this THURDAY: Making the Most of Spraying in Covered Crops (including Cannabis)

As anyone growing greenhouse vegetables, floriculture or cannabis crops knows, most pesticide application information out there is NOT geared towards covered crops. To help growers improve spray coverage and product efficacy of both conventional and microbial pesticides, Niagara College’s Cannabis Program has put together a webinar of experts. Together, they have over 100 years of combined pesticide application experience (*insert joke about how old they all are here*).

The panel includes both government and industry experts, including Dr. Jason Deveau from OMAFRA, Dr. Michael Brownbridge from BioWorks, and Louis Damm from the Dram Corporation. This webinar will focus on cannabis as a model crop, but much this information is highly applicable to floriculture as well.

Read on for information on this free webinar and a link to the recording.

Continue reading “Webinar this THURDAY: Making the Most of Spraying in Covered Crops (including Cannabis)”

Missed Our Webinar on Strategies to Improve Spring Crops? View it Here!

If you missed our presentation by Dr. Neil Mattson (Cornell University) on November 18th, fear not! There’s a few ways to still watch his presentation!

You can either register for the original webinar here, which will then give you access to the recording on Zoom.

Or, you can check out the recording on our ONFloriculture YouTube Channel! An added bonus? By subscribing to the channel, you’ll always be notified when we post new videos. A direct link to Dr. Mattson’s talk can be found here.

Continue reading “Missed Our Webinar on Strategies to Improve Spring Crops? View it Here!”