Worried About Whitefly? Control Strategies in Poinsettia for 2018.

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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.”

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Lassoing Loopers: why you NEED to care about caterpillar control

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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”

Leafminer control in Ontario’s greenhouse crops -what’s working?

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Fig. 1. Leaf mines on gerbera leaves.

As much as we all hate thrips, there are, frankly, worse problems to have.  And it’s name is Leafminer.  These flies cause just about the ugliest damage we see in floriculture (Fig. 1), and they have incredible pesticide-resistance capabilities. Outbreaks seem to go in cycles, and I’ve had quite a few gerbera and mum crops come across my desk with leafminer this past 2 weeks.

This post covers chemical options (BawHawHawHa!!! Oh… Sorry… I’ll get myself under control now) and non-chemical options for leafminer, as well as how their control fits into the big picture in greenhouse IPM programs.  

Continue reading “Leafminer control in Ontario’s greenhouse crops -what’s working?”

Where do thrips come from? YOUR MUM(s).

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Thrips damage on mums.

Hopefully my bad attempt at a “Your Momma” joke will get your attention, because this is an important post.

Ongoing research by Rose Buitenhuis’ Lab at Vineland has shown that an incredible number of thrips and spider mites come in on imported mum cuttings. Here’s the scoop and what you can do about it.

 

Continue reading “Where do thrips come from? YOUR MUM(s).”