Latest Reports and Publications

Corporate brochure 2014
September, 2014

Features

  • Chair remarks
  • CEO remarks
  • Board of Directors
  • Science Advisory Committee members
  • Stakeholder Advisory Committee members
  • Business update
  • Research strategy
  • Our 10 research programs
  • Partners and collaborators
September, 2014

IOBC WPRS Bulletin, 2014, 102: 23-28.
The article is available here at a cost

Abstract: Michael Brownbridge, Rose Buitenhuis, Taro Saito, Angela Brommit, Paul Côté and Graeme Murphy. Historically, poinsettia cuttings shipped into Ontario from offshore production facilities have carried very low levels of immature Bemisia whiteflies. These have been successfully controlled by preventative releases of parasitoids (Encarsia formosa, Eretmocerus mundus). In 2012 though, cuttings arrived into Ontario carrying large numbers of Bemisia eggs and nymphs. Parasitoid releases proceeded as normal but failed to regulate whitefly populations; multiple pesticide treatments were required to provide effective control. Endemic whitefly resistance (owing to heavy pesticide use in production facilities) means that insecticides registered in Canada frequently have reduced efficacy. Furthermore, pesticide residues on imported material can have a detrimental effect on parasitoid survival and performance. To ensure greater sustainability in poinsettia production, new methods of control are required to mitigate incoming pests on cuttings and ensure that biological control systems can be maintained through the crop production cycle. Several reduced-risk products, biopesticides and combination treatments, applied to infested cuttings by dipping immediately prior to sticking, were therefore evaluated to determine their relative efficacy against whitefly, ensure compatibility with parasitoids and to assess possible phytotoxic effects. A combination of insecticidal soap and Beauveria bassiana (BotaniGard® WP; BioWorks Inc., Victor, NY) was the most effective treatment tested; phytotoxic effects were minimal (some variation across cultivars) and survival of Encarsia and Eretmocerus was not affected following release onto treated leaves. The project has allowed effective treatments to be identified that can be readily implemented on a commercial scale.

September, 2014

IOBC WPRS Bulletin, 2014, 102: 29-35.
The article is available here at a cost

Abstract: Michael Brownbridge, Taro Saito and Paul Côté. Western flower thrips (WFT) are a major impediment in greenhouse floriculture. They are pests of global significance, resistant to many conventional insecticides and in Canada today, there is only one registered product that will successfully control this insect. Biological control is the only viable option available to Canadian growers. The thrips life cycle provides two distinct environments and life stages that can be targeted with different natural enemies. Nematodes, primarily Steinernema feltiae (e.g., Nemasys®), applied as a drench treatment, are widely used against soil-dwelling stages (pro-pupae and pupae). Metarhizium brunneum (formerly anisopliae; Met52® granular biopesticide) is registered for thrips control in Canada. The fungus is incorporated into potting media and will infect and kill thrips entering the soil to pupate. The purpose of the current trial was to define efficient use practices for these biocontrol agents and confirm their compatibility. We investigated effects of plant growth stage on nematode deposition onto the soil, nematode-Met52compatibility, and the relative efficacy of individual and combined, i.e. Nemasys + Met52, treatments against WFT. As chrysanthemums grew and the density of the plant canopy increased, fewer nematodes reached the soil after each spray which may affect efficacy. Overall, Met52 appears to be compatible with S. feltiae. Individual nematode and fungus treatments had a measurable suppressive effect on thrips, but the combined nematode/fungus treatment provided superior control. WFT populations were consistently lower on plants receiving the combined treatment; at the conclusion of the trial (8 weeks) < 10 WFT/pot were recovered. Opportunities therefore exist to enhance the reliability and cost-effectiveness of thrips biocontrol agents by taking an integrated approach to their deployment.

September, 2014

IOBC WPRS Bulletin, 2014, 102: 37-43.
The article is available  here at a cost

Abstract: Rose Buitenhuis. We have been doing a lot of research to optimize biocontrol and to convince growers that biocontrol is the way to go, but good pest control is still hit or miss because we still concentrate too much on the individual components instead of on the whole picture. Using the systems approach, I think we can build more robust IPM programs and identify areas of weakness that have to be addressed by research or innovation.

July, 2014

Biocontrol Science and Technology, 2014, 24 (10): 1153-1166.
The article is available here to individuals with subscription.

Abstract: Rosemarije Buitenhuis, Erik Glemser and Angela Brommit. This research investigated factors that affect the performance of Neoseiulus cucumeris (Oudemans) (Acari: Phytoseiidae) slow release sachets, focusing on dispersal in environments with non-continuous canopies and high exposure to greenhouse environmental conditions. When released from a central plant in a tray, the distribution of N. cucumeris across all other plants was uneven with the majority of mites recovered at the release point. Shading by a plant canopy reduced the mean internal temperature of the sachets, temperature peaks were less pronounced and the relative humidity was higher than in exposed sachets. Most N. cucumeris left the exposed sachets in the first week, followed by reduced emergence and no signs of breeding were observed in the sachets. Sachets in a plant canopy had low emergence during the first week, increasing thereafter. Overall, plant canopy sachets released more N. cucumeris than exposed sachets. Emergence patterns of N. cucumeris from sachets under greenhouse and ideal conditions were variable, with sachets generally performing better under ideal conditions. Even under constant ideal conditions, the number of N. cucumeris released from sachets varied among batches and some produced a suboptimal number of predators. Results demonstrate that exposed greenhouse conditions can seriously affect the performance of N. cucumeris sachets and that good coverage is needed to compensate for limited dispersal in non-continuous plant canopies.

Pages