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Tag Archives invasive species — page 2

Asian giant hornets have noticeably large orange heads and black eyes; worker hornets are about 3.5 cm in length; queens can be up to four to five cm in length, with a wingspan of four to seven cm. (B.C. Ministry of Agriculture)
Livestock

More ‘murder hornets’ found in B.C., Washington

Findings suggest some were able to overwinter

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Reuters/Staff — Officials in British Columbia and Washington state have confirmed new sightings of the Asian giant hornet, dubbed the “murder hornet,” indicating the invasive, predatory insect survived the winter in the Vancouver area and U.S. Pacific Northwest. The stinging hornet, whose queens can grow as large as 2-1/2 inches in length, could potentially pose […] Read more
Wild boar are especially concerning because of their disease transmission potential.
Livestock, News

Wild boar groups small so far in Ontario

There is concern about growing numbers of feral hogs due to their potential role in African swine fever transmission

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Reported sightings of large groups of wild pigs – known as “sounders” – in Ontario are still limited to one or two instances in the Parry Sound/Magnetawan district, although there are reported sightings across much of the rest of the province.. Government and non-governmental scientists tracking the animals’ movements believe Ontario still has the opportunity […] Read more
The hairless stem of a waterhemp (right), compared to the hairy stem of the pigweed (left) is the easiest way to differentiate the two species.
News

Waterhemp difficult to distinguish from pigweed

Using herbicide programs effective on pigweed, should cover waterhemp too, so far

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Waterhemp and pigweed species are difficult to differentiate, until they become larger – often past the ideal stage to control the waterhemp species. Mike Cowbrough, weed specialist with OMAFRA, says the herbicide programs identified by the University of Guelph Ridgetown campus, which are effective on waterhemp are equally effective on pigweed and other species. “There […] Read more

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