In nature, there are scarier things than ghosts!

In the October 28th show, we learned about bark and wood boring insects such as the European Elm Bark Beetle (Scolytus multistriatus), which is nonnative to the United States. This beetle is a vector for Dutch Elm Disease (DED), caused by a fungus which is transported via the water carrying vessels (i.e. xylem) of elm trees. In response, the tree plugs up its own xylem, thus stopping the movement of the fungus, but unfortunately also blocking movement of water and nutrients. An infected tree eventually loses its leaves prematurely and experiences branch dieback. Elms are commonly planted in urban areas because of their beautiful shape, so the effects of DED are quite visible. Treatment only prolongs the life of the tree at best, so research is currently underway to develop DED-resistant elms.

There are many stories of invasive insects in the U.S. that are changing our forests. For more information on such insects, visit the Forest Pests website. One thing you can do to help prevent the spread of damaging insects, particularly those that bore into wood, is to only burn firewood in areas where it originated, i.e. don't move firewood.

We also learned about the history of pumpkin carving and heard about some recent tidbits from nature:

• Naked mole rats beat cancer
• Ten-foot great white shark nearly bitten in half by a twenty-foot great white shark!
• Do men prefer a pretty face or a hot body?

For the sound quiz, we heard from some traditionally scary beasts such as vampire bats, screech owls, ravens, wolves, and mountain lions. Music featured included David Bowie, Aphex Twin, Mogwai, Blur, Starlight Mints, Devendra Banhart, Liz Phair, Yo La Tengo, and more!