With the holiday season over, it’s time to turn our attention to Spring bedding crops. Although here for a brief window, the diversity of these crops means you’re bound to encounter some sort of disease and insect problems.
One way you can head off issues is to plan and prepare now. This post has important tips on sanitation for common spring crop diseases, dips and early sprays to prevent key pests, as well as tips on where to spend your biocontrol dollars.
Continue reading “Preventing Issues in Your Spring Crops: Sanitation, Dips and Bio Tips.”
Investigating biocontrol options for our industry is always important, given the lack of registered insecticides in this country. Currently, we are relying heavily on two closely related chemicals – Beleaf (flonicamid) and Endeavor (pymetrozine) – for control of the foxglove aphid (Aulacorthum solani). If our battle with thrips (and Bemisia whitefly) have taught us anything, it’s to be prepared for chemical failure.
Unfortunately, biological control of foxglove aphid has been challenging so far. For example, my own research showed that Aphidoletes, a “generalist” aphid predator, actually has lower preference for foxglove aphid than other species, and is less effective for this pest. However, a long-term project by Dr. Michelangelo La-Spina (Vineland Research and Innovation Centre) has found some results that get us closer to being able to control foxglove aphid WITHOUT resorting to pesticide sprays.
One way YOU can help move this research forward is by filling in this quick, 10 question survey if you’re a grower (even if you’ve never had problems with foxglove aphid before). Read on for more details on exactly what Dr. La-Spina has found.
Continue reading “Update on foxglove aphid control: seeking greenhouse collaborators!”
Given that it’s the season for pest problems like aphids on spring crops, I’d like to remind everyone of an important new pest management tool we have at our disposal.
Thanks to the hard work of Cary Gates at Flowers Canada Growers, and OMAFRA’s Jim Chaput, Beleaf (flonicamid) can now be used as a drench on greenhouse-grown ornamentals and cut flowers.
Read on for more details regarding the expanded label and potential phytoxicity issues.
Continue reading “Using Beleaf (flonicamid) as a drench: benefits and (potential) drawbacks.”
You know the old rhyme: “April showers bring May flowers, but what do May flowers bring? Aphids“. Or sometimes it seems that way, anyways, with Spring bedding crops.
To help guide your pest management program this year, our friends (superiors?) over at Michigan State Extension have released a handy list of which crops are likely to attract which pests. Keep reading for more info.
Continue reading “Spring crops that are “magnets”for certain pests.”
Aphis gossypii come in a variety of colors, as shown above. But all colors share one thing in common – black cornicles at the tip of their bodies. These can be seen with a hand lens.
Usually on this blog we bring YOU the information. Today it’s the opposite. I’m looking for a grower who has live melon aphid (Aphis gossypii) in their operation, and wouldn’t mind a researcher coming by to remove some of them to start a research colony with.
If you have some you wouldn’t mind parting with, please contact Rose Buitenhuis at 905.562.0320 Ext. 749 or firstname.lastname@example.org who can get in touch with our contact at Laval University. They might even name the colony after you…
As a refresher, Melon aphids tend to be the smallest aphid found in your greenhouse. They can come in a variety of color morphs – from pale green-yellow to dusky grey – but they ALWAYS have black cornicles (or “tail pipes”) at the end of their abdomen. They are common in crops like kolanchoe and gerbera and a variety of other spring crops.
If you comment on this blog post regarding aphids in your greenhouse only I (sarah) will see it.
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”
Foxglove aphid feeding on pansy. Note the two dark-green spots on the abdomen and the dark leg joints which are characteristic of this pest.
Now that temperatures have cooled down, it’s time to start watching for foxglove aphid as your primary aphid pest, rather than green peach or melon aphid. Here’s links to 2 articles that were published this week that talk about this pest’s biology and control measures.
Continue reading “Cooler weather means more foxglove aphids: a refresher”