Crop Protection
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.
Is 2006 shaping up to be… the year of the thrips? The mild winter may have allowed outdoor thrips populations to survive more successfully than in previous years.
An overview of Ontario’s greenhouse vegetable industry.  Among continuing trends, glass and hot water heating are popular with new construction.
Managing resistance in cabbage loopers. 
Thrips accounts for more than 25 per cent of insect pest management costs in Ontario’s floriculture industry. WFT is especially difficult and expensive to control because many of its life stages are hidden in the plant foliage.

The reasons why it’s difficult to freeze out pests in greenhouses.  We are at that time of year when many greenhouse vegetable growers are thinking of cleaning up for the spring crop.
DNA – a new tool for insect identification.  This technology should prove to be a valuable aid to taxonomists and will be a major resource for plant exporters.
Watch out for those late-season glitches.  In the previous couple of issues, I have discussed many of the important cultural aspects of which we as growers need to be mindful when establishing and growing-on quality poinsettias.
Botrytis … ’tis the season!  Growers need to implement strategies to ward off this ever-present fungus
Page 13 of 15

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