Asian Lady Beetle - An Invasion!
Harmonia axyridis There are around 18 species of ladybird beetles in Ontario, all of which feed on aphids and mealy bugs. However, Harmonia axyridis was considered very effective in eradicating the pest problems associated with crops such as soya. Hence it was introduced into USA and thus entered Canada. Here is an account entailing general information and observations on this beetle. Asian Lady Beetle showing the "W" mark on it's pronotum Asian Lady Beetle is a beautiful ladybird native to eastern Asia. It is easily identified by the “M” or “W” mark – whichever way you see it, on the pronotum (just behind the head). It lives for one to three years, depending on the availability of food and surviving winter several times. When disturbed – or handled – it produces an odor to deter predators, the smell is however insignificant and can be easily washed away. They are gentle and do not bite to humans, but some people are allergic to this beetle. It was first introduced...