Latest Reports and Publications

June, 2018

Currently, the vast majority of North America’s container-grown nursery crops are produced using soilless growing substrates and fertilized with controlled-release fertilizers. In the past several years, Vineland has conducted on-farm trials, with representative, industry-standard cultural practices, using most common crops, growing substrates, and fertilizer types to provide fertilization guides for nursery operations in temperate climate regions.

Ontario horticulture research priority report 2018
May, 2018


  • Edible horticulture
  • Ornamental horticulture
May, 2018

Journal of Pest Science, May 25, 2018 
Click here to view the article

Abstract: T. Saito and M. Brownbridge. Foliage-dwelling predatory mites and foliar applications of mycoinsecticides are commonly used in biological control programs for Western flower thrips. A laboratory study was designed to examine the compatibility of two foliage-dwelling predatory mites with two commercially available mycoinsecticides, followed by a greenhouse study to assess their combined efficacy against Western flower thrips, with a view to their concurrent use in an integrated strategy. The following commercially available biocontrol agents were evaluated: the predatory mites, Neoseiulus cucumeris (Oudemans) and Amblyseius swirskii (Athias-Henriot); and entomopathogenic fungi, Metarhizium anisopliae (Metschnikoff) Sorokin (now classified as Metarhizium brunneum) strain F52 and Beauveria bassiana (Balsamo) GHA strain. Mortality caused by the mycoinsecticides ranged from 0 to 15.98% in the laboratory studies. In the greenhouse, the relative efficacy of predatory mite slow-release breeding sachets, Met52 EC spray, and a combined application was determined. Under high pest pressure, Met52 EC-alone was not as effective as N. cucumeris-alone or the combination treatment over 8weeks. Neoseiulus cucumeris-alone provided better control of thrips than Met52 EC, but in a mixed infestation of thrips and two-spotted spider mites, the combination
treatment worked best overall; the spider mites were effectively suppressed by Met52 EC. Under low pest pressure in the experiment with A. swirskii, use of Met52 EC or A. swirskii sachets effectively suppressed thrips population growth; moreover, the combination treatment completely eliminated both thrips and spider mites.

March, 2018

Journal of Invertebrate Pathology, In Press, November 28, 2017
The article is available here at a cost.

Abstract: M. Brownbridge and R. Buitenhuis. Historically, greenhouse floriculture has relied on synthetic insecticides to meet its pest control needs. But, growers are increasingly faced with the loss or failure of synthetic chemical pesticides, declining access to new chemistries, stricter environmental/health and safety regulations, and the need to produce plants in a manner that meets the ‘sustainability’ demands of a consumer driven market. In Canada, reports of thrips resistance to spinosad (Success™) within 6–12 months of its registration prompted a radical change in pest management philosophy and approach. Faced with a lack of registered chemical alternatives, growers turned to biological control out of necessity. Biological control now forms the foundation for pest management programs in Canadian floriculture greenhouses. Success in a biocontrol program is rarely achieved through the use of a single agent, though. Rather, it is realized through the concurrent use of biological, cultural and other strategies within an integrated plant production system. Microbial insecticides can play a critical supporting role in biologically-based integrated pest management (IPM) programs. They have unique modes of action and are active against a range of challenging pests. As commercial microbial insecticides have come to market, research to generate efficacy data has assisted their registration in Canada, and the development and adaptation of integrated programs has promoted uptake by floriculture growers. This review documents some of the work done to integrate microbial insecticides into chrysanthemum and poinsettia production systems, outlines current use practices, and identifies opportunities to improve efficacy in Canadian floriculture crops.

February, 2018

This is the latest research update for Vineland's Greening the Canadian Landscape program.