Selwyn Times: March 11, 2020
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12 Wednesday <strong>March</strong> <strong>11</strong> <strong>2020</strong><br />
Latest Canterbury news at starnews.co.nz<br />
BACKYARD CRITTERS<br />
SELWYN TIMES<br />
Mike Bowie is an ecologist who specialises in entomology (insects<br />
and other invertebrates). Each week he introduces a new species<br />
found in his backyard at Lincoln. His column aims to raise public<br />
awareness of biodiversity, the variety of living things around us.<br />
Check out the full list of invertebrates found at www.inaturalist.org/<br />
projects/backyard-biodiversity-bugs-in-my-lincoln-section<br />
Beautiful beetles but<br />
savage predators<br />
THE harlequin ladybird<br />
(Harmonia axyridis) is a<br />
nasty predator that was<br />
first found in Auckland<br />
in 2016 and has spread<br />
through the North Island<br />
and as far as Central Otago<br />
in the South Island.<br />
The 5-8mm long ladybird<br />
is a native of eastern<br />
and central Asia. It is<br />
round to oval in shape,<br />
domed and extremely variable<br />
in colour and patterns.<br />
Spots on ladybirds can<br />
range in number from zero<br />
to 22 , while colours range<br />
from yellow-orange and<br />
black. The thorax often has<br />
black spots in the shape of<br />
an ‘M’ or ‘W’.<br />
The problem with this<br />
species overseas is that<br />
it has displaced native<br />
ladybirds and could do the<br />
same here.<br />
The harlequin ladybird<br />
contains a distasteful and<br />
pungent chemical that it<br />
uses in defence against<br />
PRETTY: The harlequin ladybird could displace<br />
native species and produces a pungent chemical<br />
that can affect grape crops during harvest.<br />
predators when threatened.<br />
This can be an issue<br />
when the ladybirds hide<br />
amongst grapes during<br />
harvest as the chemical<br />
can taint the taste.<br />
They overwinter as<br />
adults in sheltered locations,<br />
sometimes in<br />
large groups and emerge<br />
when temperatures reach<br />
12 deg C.<br />
Females lay between 20-<br />
30 yellow eggs per day and<br />
can produce as many as<br />
3800 eggs in a lifetime.<br />
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Published by <strong>Selwyn</strong> <strong>Times</strong> - Star Media<br />
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