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Greg Laychak/ The Observer
Bob Vernon holds the cheap and easy-to-use click beetle trap he designed using pheromones to attract males for research purposes..
Research builds a better bug trap Lessons learned in the potato fields of PEI are being applied here
By Greg Laychak THE OBSERVER
A recent trap design for click beetles in Atlantic Canada has local agricultural researchers excited about its possibilities for use in B.C. to understand more about the pest whose larvae have the potential to destroy potato crops among others. Agriculture and Agri-Food Canada (AAFC) entomologist Christine Noronha unveiled her newly designed, simple and environmentally friendly trap last Monday at a wireworm information session hosted by the PEI Potato Board in Charlottetown.
“For us it's a very useful tool to be able to collect females and to study aspects of female click beetle behaviour and various control options,” said Agassiz research scientist Bob Vernon, who has been studying wireworms (which are not actual worms, but click beetle larvae) for 20 years with AAFC. In fact, Vernon designed a trap of his own recently and is working with Noronha to combine the differences of their cheap and easily-built devices to enhance pest control for farmers across Canada. “[They’re] tools in the wireworm control toolbox that we're trying to
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build,” he said. “None of the traps... are a silver bullet. They are either useful tools for researchers or useful to growers or indicating that you've got certain species.” The Noronha Elaterid Light Trap, or “NELT”, is made with three pieces—a small solar-powered spotlight, a plastic white cup and a piece of screening. It uses light to attract female click beetles that emerge from the ground in May and June. Each of these beetles can lay between 100 and 200 eggs that produce wireworms. In a six-week test with 10
traps, more than 3,000 females were captured in the plastic cups, preventing the birth of up to 600,000 wireworms. And screening on Noronha’s trap prevents beneficial predator insects from being caught in the trap. Vernon’s trap on the other hand catches about 7,000 beetles over the course of four days and is 80 to 85 per cent effective within a 10 metre radius. But it’s not a numbers competition. “My traps have certain qualities that the P.E.I. trap doesn't and vice versa,” Vernon said. Continued on Page 2
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