Comparing Biocontrol to Pesticides for Bemisia Whitefly Control in Poinsettia

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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.

An in-depth discussion of this topic was also captured by MSU’s “Bug Bites” last year, and I’ve included the video below.

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Poinsettia Production Tips: 2021

Poinsettias on Cruise Control | Greenhouse Industry Roundtable of ...

Poinsettia cuttings being rooted. Photo courtesy of Ohio State University.

Now 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, and for some great video resources on poinsettia production.

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Poinsettia Problems: Your Monthly Scouting Guide, 2021

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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.

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NEW: Free Online IPM Training for Greenhouse Staff

Need a refresher on specific pests of floriculture, and what to do about them? Want to see how Canada – a world leader in biological control in ornamental crops – does things?

Then the following IPM training videos, made by specialists and consultants in Ontario, are for you!

Keep reading to learn how to access these videos, and the topics they cover.

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They’re HEEERRE! Japanese Beetles Are In Flight.

Japanese Beetles Have Started To Emerge

Posted on June 25, 2021 by Jen Llewellyn

<a href="/clm/species/popillia_japonica"><em>Popillia japonica</em></a> (Japanese Beetle) adult on cedar.

Japanese Beetle (Popillia japonica) adults are starting to take flight in southern Ontario!  They have been spotted in Hamilton and Toronto this week.

Look for these shiny green and copper beetles feeding on grape leaves, roses and many other trees and shrubs. Where possible, homeowners can knock adults into a bucket of soapy water (to smother them).  Several insecticides are registered for the adults in greenhouses and nurseries, including BeetleGONE.

European chafer (Amphimallon majale) adults are also starting to emerge. Look for medium brown scarab beetle swarming blooming Linden trees (e.g. Tilia cordata).  Historically we see them around Canada day in the Guelph area.

RoseChaferAdultJLA 

And don’t forget about our little friends, the Rose Chafers (Macrodactylus subspinosus), pictured aboveThey are also out in full force. These scarab beetles feed on the flowers, fruit and foliage of several ornamentals.  The larval stage feeds on roots of grasses and weeds (usually a sod nursery pest). Like most scarab beetles, females are more likely to lay their eggs in sandy soils and will avoid egg laying in clay soils.  Insecticides for the grub stage of other scarab beetles will also reduce larvae of rose chafer.

Preventative applications of Intercept and Acelepryn are registered for white grubs in nursery and greenhouse production and the application period begins now. (Above photo: European chafer larval feeding damage).

Have questions regarding pesticide applications for this pest? Then check out this post from a few weeks ago on JB control and export regulations.

New Covid-19 Funding Alert! Agri-tech Innovation Program webinar on May 20th

As I mentioned in my last post, it’s incredible how fast the sector is evolving when it comes to Covid-19 and mitigating its effects in agriculture.

OMAFRA is pleased to announce the new Agri-Tech Innovation Program, with $22M in funding to help farms adopt innovative technologies that protect workers against Covid-19.

To learn more about this program, see the details below for the information webinar on Thursday at 9 am.

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Confused About Covid Programing? Introducing OMAFRA’s COVID-19 Webinar Series!

With information on Covid-19 changing over time, and funding programs evolving to keep up with grower needs, it can be hard to keep track of what’s happening week-to-week regarding Covid and agriculture.

To help deliver up-to-date information to stakeholders, OMAFRA will be delivering a COVID-19 OMAFRA Monthly Webinar Series.

The series will be an opportunity to provide information, address concerns and promote tools and resources offered by OMAFRA.   The first webinar in the series is TOMORROW (May 18th) at noon, and will cover changes to the Enhanced Agri-Food Workplace Protection Program. Be sure to keep reading for how to access it!

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REPOST: Water Sanitation Part 1: Identifying Problems Before They Start

Spring is just around the corner, and this is historically the time of year where we get more calls about disease pressure and problems in the crop.  This post is part of a series too get you reflecting on your own irrigation system before you are faced with a problem.  We’ll re-post some older posts about on identifying problems in the greenhouse and how to test your water, while adding some new posts on interpreting lab test results, on-farm methods for disease monitoring, water treatment technology options and more.  These will be good refresher resources, so make sure to bookmark them for future reference.

Ever wonder how water related disease issues just seem to pop up out of nowhere? You’ve never had a problem before, but suddenly things just aren’t looking right. The truth is that problems often go unnoticed while pathogen levels are low.  Knowing potential innoculum sources and practicing good preventative measures can help to reduce the risk of a bigger problem. Continue reading

OMAFRA Controlled Environment Agriculture Series — Cannabis Potency and Horticultural Management Strategies

OMAFRA’s webinar series dedicated to optimizing production in environmentally controlled agroecosystems continues. This time, they’ll be addressing how horticulture practices impacts the quality of cannabis characteristics. Share with anyone you know might be interested!

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