Despite a cooler and wetter spring, B.C. might not be in line for excessive mosquitoes this summer, according to an expert.
Rain water does contribute to ideal breeding conditions, said Dan Peach, an entomologist completing a post-doctoral fellowship at UBC, but there are other factors in play when it comes to mosquito population and it remains to be seen if there will be a boom.
sa国际传媒淚tsa国际传媒檚 an interesting trade-off sa国际传媒� the more water and more moisture means more habitat for mosquitoes,sa国际传媒� said Peach. sa国际传媒淭here are mosquitoes that use temporary water habitats, and so they wonsa国际传媒檛 dry out as quickly. But the flip side of that is because of how cool itsa国际传媒檚 been, it takes longer for mosquitoes to develop and for those species, which have multiple generations a year, this will hamper their ability to build up their population numbers, so it depends on exactly how those trade-offs will really interact going forward.sa国际传媒�
Peach was out collecting specimens two weeks ago that he said he would normally come across in late winter or early spring.
With Environment Canadasa国际传媒檚 special weather statement forecasting warmer and sunnier weather in the coming days, that might also affect mosquito numbers.
sa国际传媒淟ast year, they plummeted towards the end of the summer there,sa国际传媒� said Peach. sa国际传媒淒uring the heat dome, it really knocked them down. Heat and dryness will kill adult mosquitoes quite well. They desiccate sa国际传媒� they dry out and die. It also dries up breeding habitat for them so they cansa国际传媒檛 reproduce as well.sa国际传媒�
A hot, wet summer would likely lead to elevated numbers, the entomologist said.
In terms of mitigating risk of being bitten, Peach recommends disposing of standing water that can accumulate on tarps and in buckets, as that is premium habitat for breeding. A press release from pest control company Orkin Canada recommends trimming vegetation, circulating water in pools, fountains and ponds and using yellow bulbs outdoors, as they are less attractive to mosquitoes.
Peach said wearing light-coloured clothing also helps as female mosquitoes, which are the ones that draw blood, sa国际传媒減refer dark coloration,sa国际传媒� and wearing insect repellent or natural alternatives can also be effective.
sa国际传媒淟emongrass and citronella are great, rosemary too,sa国际传媒� said Peach. sa国际传媒淵ou kind of want a bunch of those things.sa国际传媒�
He also pointed out the insects also get a bad rap and have ecological benefit. Theysa国际传媒檙e pollinators and a food source, with bats, spiders, fish, birds, frogs, dragonflies and their larvae and predaceous diving beetles among the species feeding on mosquitoes or their larvae.
sa国际传媒淟arval mosquitoes are filter feeders and in some ways, theysa国际传媒檙e helping to convert solar energy from the sun into biomass,sa国际传媒� said Peach. sa国际传媒淪o the larvae will eat algae, and decomposing organic matter and theysa国际传媒檒l convert that into insect biomass sa国际传媒� and either something eats them or they die somewhere and decompose. In either case, thatsa国际传媒檚 helping to transfer nutrients from solar energy into biomass. So you think of the sheer number of mosquitoes in some environments, and there might be a lot at play there.sa国际传媒�
Peach seeks assistance for his research. He asks people put sa国际传媒渟quishedsa国际传媒� mosquitoes on a piece of paper, include date of collection and address, cross-street or coordinates from Google Maps, and mail to Ben Matthews Lab, UBC Department of Zoology, 4200-6270 University Blvd., Vancouver, B.C., V6T 1Z4.
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