It’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”
This post on poinsettia problems was contributed to by Drs. Chevonne Dayboll and Sarah Jandricic.
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”
Here 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”
T’is poinsettia sticking season once again, and the question always comes down to the same thing: do I use chemicals to control Bemisia whitefly and hope it works this year? Or do I switch to biological control? Here we show some head to head comparisons that can help you decide.
Continue reading “Poinsettias: To Spray or Not to Spray, that is the Question”
How are YOU controlling your Echinothrips? (Photo by Entocare NL).
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 this Echinothrips.
Read on for their latest update on what’s working, and how this applies to Canadian growers.
Continue reading “Controlling Echinothrips in Ornamentals without Pesticides: News from the Netherlands.”
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 failing. After a (too long) investigation by myself, the grower, and consultants, we found out the horrible truth: their predatory mites were being MURDERED (Duh dun DUHNNN!)… By improper storage.
This post focuses on all the ways YOU might also be guilty of mite murder, and how to make sure your mites are still alive and kicking in those little sachets.
(And yes, I’ve stooped to the level of click-bait titles).
Rooted Calibrachoa plugs. Photo from jparkers.co.uk
It’s that time of year again, when unrooted cuttings or rooted plug trays of Million Bells (Calibrachoa) are first arriving in the greenhouse.
When they go right, Calibrachoa are a relatively easy, staple spring crop. However, when million bells go bad, they go bad BIG time.
To help your crop turn out this year, Chevonne and I have compiled some info on how to prevent and deal with common issues in Callies.
Continue reading “Managing Million Bells, 2017 Updates”