Crop Protection
April 23, 2008 - Legislation was introduced yesterday that will ban the use of cosmetic pesticide use on lawn and gardens in Ontario by next spring. The Globe and Mail reports. | READ MORE
Last year in our August/September issue I wrote in detail about Sudden Oak Death (SOD). Amongst other ideas, I said that the Canadian Nursery Landscape Association was attempting “to develop and implement a Canadian Nursery Certification Program for exporting nurseries.
Students sometimes stare blankly when required to wear safety footwear in our college greenhouses. When it’s explained that in cases where students’ toes are run over by the electric (crop work) carts, and it’s usually not the cart that is taken to the emergency room at the local infirmary, then they get it.
Some pesticides remain effective, but potential for resistance development is high

The entire pesticide situation for gardeners is in a state of flux as older products are banned from the marketplace yet few new ones are available.
The market for domestic pesticides is rapidly changing across Canada, due much in part to public concerns about possible health risks that have been linked to their use.
Bacterial canker control trials.  This major disease can cause significant losses in both field and greenhouse tomato crops.
University of British Columbia (UBC) graduate student Saber Miresmailli is devising a monitoring device and sensory system that can head pests off at the pass.
An increasing number of growers are banking on biologicals for thrips control as part of their IPM programs.

Reviewing the 2006 Easter lily crop: root rot, fungus gnats and PGR issues.  Take time to document this year’s successes and mistakes to help next season.
Use of Decree for Botrytis control in greenhouse tomato crops.  Botrytis cinerea is one of the most commonly occurring disease-causing organisms in greenhouse crops. Management of Botrytis or Grey mould depends heavily on sanitation and good management of the environment.
Broad mites (Polyphagotarsonemus latus) attack young growing plant parts and cause pronounced stunting and even death of the growing point. Various studies suggest that species of Amblyseius or Neoseiulus have potential for managing this mite.

Greenhouse vegetable growers have a new tool for managing two-spotted spider mites. This product offers them new chemistry for managing TSSM in IPM programs, particularly those that incorporate the use of biological control agents.

Poinsettia preview – getting the crop out of the blocks quickly and smoothly!  How we handle the cuttings for the first 4-5 weeks after transplanting usually plays a role in the quality at the end.
It seems as though I am writing about poinsettias and whiteflies more and more often lately. Perhaps it is because of recent concerns about new strains of whitefly; perhaps because I have been involved in whitefly projects in poinsettias for the last couple of years and it is on my mind more often.
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