Tag Archives: bacteria

Gallery of dead potatoes in silk-lined coffins

In case you never get to visit The Canadian Potato Museum on Prince Edward Island, here are photographs from the excellent exhibit on diseases and pests of potatoes. I’ve included all the accompanying interpretive signs in case you want the gruesome details but it’s really all about the adorable coffins. Poor little spuds. RIP.

Bacterial soft rot is primarily caused by Pectobacterium carotovorum (aka Erwinia carotovora).

Bacterial ring rot is caused by Clavibacter sepedonicus (formerly called Clavibacter michiganensis subsp. sepedonicus). Note that the potato has fallen off its attachment point higher up in the coffin.

Blackleg is caused by Pectobacterium atrosepticum.

Fusarium dry rot is caused by several species of Fusarium, of course. But also by Gibberella pulicaris, which was formerly in the genus, I gather).

Skin spot is caused by the fungus, Polyscytalum pustulans.

Potato wart is caused by the chytrid fungus, Synchytrium endobioticum. Lesions make the potatoes unmarketable, which is bad, but also result in fields being quarantined and potentially never farmed again.

Many types of slugs eat potatoes.

The potato-rot nematode is Ditylenchus destructor. As in several other coffins, the potato seems to have become unglued.

White grubs are the larvae of scarab beetles (Scarabidae) in the genus Phyllophaga (May beetles, June bugs, … and sometimes even July beetles). Fun fact: they crawl on their backs.

Wireworms are the larvae of click beetles (Elateridae).

Potato scab is caused by the potato scab gnat (Pnyxia scabiei), a member of the Sciaridae. Fun fact: the females are wingless (and have no halteres!)

The flea beetle most associated with potato is Epitrix cucumeris.

The most common millipede in potato fields is the spotted snake millipede (Blaniulus guttulatus).

Blackheart is not a disease but rather a physiological response to low oxygen during growth or storage. High temperatures during transport and storage are the main culprits. Blossom-end rot is caused by the same conditions.

In case you are curious, the coffins were designed by Meredith and Tom Hughes for the “The Amazing Potato” exhibit (1991-1994) at Canada’s Museum of Science and Technology in Ottawa. There are, apparently, undisplayed coffins because the O’Leary building was too small to house them all.


But you should definitely visit. You can pose in front of the 14-foot potato out front, stroll through the world’s largest exhibit of potato-related farm machinery, shop for trinkets such as squishy stress potatoes, and dine in the Potato Country Kitchen (don’t skip the seaweed pie made with Chondrus crispus, a red alga; it’s a recipe from Ireland). It’s open from May 12 to October 10.

Antibiotic Awareness Week poster

Ten interesting facts about antibiotics, for Antibiotic Awareness Week (Nov 18 -24, 2013).  Below is an image that can be used for presentations. PDF version for printing: facts-about-antibiotics.pdf.

Antibiotic Awareness Week poster

I’ve tried to craft the above poster with information that is mildly interesting, with the hope that people (people like you?) might pass the link along. There are 100s of posters on the internet … but they seem to be completely ineffective at educating the public (according to an experiment). In my view, the problem is that all of these posters use “antibiotics” instead of the correct term, “antibacterial.” Please see my page, “Curbing the misuse of antibiotics” for details on why antibiotic/antibacterial choice matters for the public, even if it doesn’t matter to you (who probably have a higher degree).

Below are some links that explore some of statements in the PDF above. I’m putting them below the fold because they are probably TMI for 99% of the people who might be interested in the above PDF. If you are that 1%, go crazy.