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New greenhouse predatory mite coming soon

Vineland has discovered a new general predator to help control pests associated with increased crop diversity in Canadian greenhouses, thanks to a five-year project funded in part by the Government of Canada under the Canadian Agricultural Partnership’s AgriScience Program, a federal, provincial, territorial initiative in collaboration with the Université du Québec à Montréal (UQAM) and the biocontrol producer Applied Bio-nomics.

“This new predator Anystis is effective against several key greenhouse pests by controlling thrips and spider mites and suppressing aphids. As a generalist predator, Anystis also preys on Echinothrips and mealybugs for which no biocontrol agents exist,” said Rose Buitenhuis, Ph.D., Vineland’s Senior Research Scientist, Biological Control. “Anystis is functionally compatible with commonly-used biocontrol agents, including aphid parasitoids and Neioseiulus cucumeris, and is a valuable addition to an Integrated Pest Management (IPM) program.”

Despite the predator’s cannibalistic tendencies, Vineland’s research team, led by Senior Research Technician Taro Saito, was able to develop in a laboratory setting two high-performing rearing systems for Anystis with costs similar to other commonly used biocontrol agents. The research team also determined adult predators can be shipped from the insectary to the customer with a low mortality rate.

"Not easily intimidated" 
Last spring, they transferred the predator to Applied Bio-nomics Ltd. for scaling up those mass-rearing systems and for commercialization. “Anystis is an exciting new predator. It appears to be a true generalist and is not intimidated by some of the toughest pest’s natural defenses such as wax and webbing. It is easy to see and scout, helping growers see their activity,  and it is always hungry, a very good trait,” said Brian Spencer, President of Applied Bio-nomics Ltd. “We appreciate Vineland’s research and their communication abilities and look forward to continuing our association with them.” The company is now successfully rearing Anystis with a limited number of mites available to growers to try.

Findings from the research project also determined the adult predator stage is the best for release in the crop, as the Anystis starts controlling pests and reproducing immediately, leading to the proper establishment. Providing supplemental food (either Artemia cysts or Ephestia eggs) sustains the predators when prey is scarce.

Additional crops
What is next? The use of Anystis as a biocontrol agent has already been validated in commercial greenhouse trials of gerbera and sweet pepper. Additional research will be undertaken to assess the effectiveness of Anystis in several other crops including greenhouse strawberries. Recent trials with Niagara College also showed promising results for using the predator in cannabis, with the intention of controlling aphids, one of the most problematic pests in this crop.

Anystis is the second new biocontrol agent to come out of this research project. The first was the Syrphid fly, an aphid predator developed by UQAM and also available through Applied Bio-nomics. 

For more information:
Rose Buitenhuis, PhD
Vineland Research


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