Worried About Whitefly? Control Strategies in Poinsettia for 2018.

Bemisia 4_SJ.JPG

Bemisia whitefly (Bemisia tabaca) adults on poinsettia.  In high pressure years, poinsettia plants can quickly become unsellable due to this pest.

The floriculture industry in Ontario seems to have mostly avoided heavy aphid AND thrips pressure this spring/summer.  But from everything I’ve been hearing, we are NOT going to be that lucky with whitefly on poinsettia this year.

 

This  post goes over preventative measures that should be taken as soon as cuttings come in the door, biocontrol programs for whitefly on poinsettia, and WHEN and WHAT to spray for this so you can avoid resistance issues.

Continue reading “Worried About Whitefly? Control Strategies in Poinsettia for 2018.”

Advertisements

Exporting to a JB-free Zone? Proper Pesticide Timing for Japanese Beetle Control in Ontario.

japanese beetle_daveNavigating the guidelines for exporting plant material out of a Japanese Beetle (JB) zone such as Ontario can be tricky business, especially with upcoming changes to the Greenhouse-Grown Plant Certification Program (GCP; formerly CGCP).

Also not helping is the general lack of information out there regarding proper timing of JB control products. For example, did you know that NO products are considered effective between May 15 and June 15?  This could create problems if you’re  shipping outside Ontario in the next month and haven’t treated yet.

To make things easier, I’ve created a treatment “decision tree” and a JB product “cheat sheet” for growers of greenhouse ornamentals.

Continue reading “Exporting to a JB-free Zone? Proper Pesticide Timing for Japanese Beetle Control in Ontario.”

The New Era of Pesticides in Canada: Cancellations, Re-evaluations, and New Products

pesticide pic

Changes will soon be coming to some of the chemical products you rely on most.

It seems  there is never a dull moment in the greenhouse ornamental industry these days.  From transitions to new crops,  new export requirements, to novel pest problems, the industry has seen a lot of change….and it’s not over yet. 

The industry is also going to be facing changes regarding some commonly used chemical products. Here is the latest on potential  revisions to the list of chemical tools we have access to in Canadian floriculture.

This is guest post was written by Cary Gates, Pest Management Director at Flowers Canada Growers.

Continue reading “The New Era of Pesticides in Canada: Cancellations, Re-evaluations, and New Products”

Upcoming IPM Workshop in Niagara: Achieving Sustainable Biocontrol in Floriculture

HandlensFeeling a bit lost when it comes to pest management? Searching for advice on how to achieve a sustainable, long-term biocontrol program for your operation?

Then mark your calendars for February 23rd! A new IPM Workshop is here. Read on for details.

Continue reading “Upcoming IPM Workshop in Niagara: Achieving Sustainable Biocontrol in Floriculture”

2017 Update: 4 Ways You May Be Killing Your Predatory Mites, and How to Check!

PowerPoint PresentationNote: 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).

Continue reading “2017 Update: 4 Ways You May Be Killing Your Predatory Mites, and How to Check!”

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.”

Lassoing Loopers: why you NEED to care about caterpillar control

tomato looper 2_Steve hatch

Know which looper species this is? Are you SURE? If not, keep reading, as some species could get your shipments detained at the border.  Photo: Steve Hatch, Bugwood.org.

With spring crops behind us and summer approaching, most of you are probably concentrating on the Big 3: thrips, aphids and whitefly.  But recent alerts put out by the United States Department of Agriculture (USDA), bring a new emphasis to caterpillar control.  Read on to understand what’s happening, how to control occasional pests like cabbage looper, and avoid potential issues at the border.

 

Continue reading “Lassoing Loopers: why you NEED to care about caterpillar control”