Klamath Weed Beetle
Chrysolina quadrigemina


Chrysolina quadrigemina
I found this little insect on some weeds on a path in Red Butte Garden, Salt Lake City, Utah and thought it might be a
lady bug species, but it turned out to
be a Klamath Weed Beetle, according to Bugguide.  © Carol Davis 9-16-2014


klamath weed beetle
I was twisting the twig around trying to get a good picture (and I had to use the flash because little black beetles are
hard to photograph in detail) when it decided to drop to the ground and skedaddle. That's a good defense technique
used by both insects and spiders.  Klamath Weed Beetles were introduced from Australia to the U.S. in 1944 to
combat the Klamath Weed, also known as Goat Weed and St. John's Wort.  It is toxic to livestock.  Cornell University
has a really good article about this tiny weed controller and the Ontario Ministry of Agriculture has an excellent
article on St. John's Wort and
Chrysolina quadrigemina © Carol Davis 9-16-2014

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