The city’s insect control branch has another battle on their hands other than the list of usual suspects - they’re running low on one of their pesticides.

Right now, there are 4,800 litres of malathion in the city’s possession. It’s the controversial substance sprayed at night when mosquito populations become intolerable.

It’s estimated what’s left will last three rounds of spraying.

"It's still registered for use in Canada, but no one at this time is manufacturing it anymore," said Ken Nowalsky, the superintendent for the insect control branch.

He has taken the search for a replacement outside the country, but Nowalsky added it takes time to find a product and get certified to bring to Canada.

"Typically, it's two to three years but I'm trying my best, I'm working. But you have to have interest from the supplier to bring the product up here."

Until then, the city has started larviciding water born larvae as they do every year, only this time it’s 100-per cent biological thanks to an increase in city funding.

The first sighting of mosquito larvae in Winnipeg happened April 11, 2015, two weeks sooner than usual.

Right now, the city’s Adulticiding Factor Analysis (AFA) rating for mosquitos is low.