Posts Tagged: Zelus renardii
There I was, walking across the University of California, Davis, campus to the Environmental Sciences Building for an agricultural communicators' meeting: a notebook in my hand, cell phone in my pocket, and my trusty pocket camera strapped around my neck.
Sometimes it's good not to lug around a 10-pound camera. Not this time, however.
Right inside the soybean planter box, I saw it--an assassin bug spearing what looked like a bee.
This was a predator-prey encounter between the assassin, Zelus renardii, and a bee, which native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis and an instructor of The Bee Course, identified as a male metallic sweat bee, Lasioglossum (Dialictus) sp., possibly L. tegulariforme.
I aimed the tiny camera and grabbed a couple of images before the predator, with prey attached, crawled beneath a soybean leaf.
Assassin bug are predators and don't distinguish between beneficial insects and pests. Still, we like them in our garden because they eat a lot of soft-bodied insect pests like aphids and leafhoppers.
Speaking of eating insects...the UC Davis Honey and Pollination Center is sponsoring a "Bugs and Beer" event on Saturday, Nov. 1 in the Robert Mondavi Institute for Wine and Food Science. It promises to be a cricket-kölsch kind of affair.
Beer expert Charlie Bamforth, Anheuser-Busch Endowed Professor of Malting and Brewing Sciences at UC Davis, will lead a joint tasting with celebrity bug chef David George Gordon, author of "The Eat-a-Bug" cookbook.
Bamford, known as "The Pope of Foam," is an icon around campus and the beer-brewing world. He's considered one of the country's most intriguing professors, noted Amina Harris, director of the Honey and Pollination Center. And David George Gordon--a fellow with three first names? He's been featured in the Wall Street Journal, Time magazine, and the National Georgraphic Kids.
Registration opened Monday (http://www.rmi.ucdavis.edu/events). Tickets are $50, general admission, and $25 for students. And, of course, "Bugs and Beer" is open only to those 21 and over because beer will be served.
We don't know what kind of bugs Gordon will serve, but they probably won't be assassin bugs. Bees, maybe. Specifically, maybe that "Three-Bee Salad?" on his website?
A fast-moving assassin bug spears a male metallic sweat bee. (Photo by Kathy Keatley Garvey)
Assassin bug paralyzes his prey. (Photo by Kathy Keatley Garvey)
It wasn't much of a fight.
The assassin bug scored a TKO.
Here's what happened: an assassin bug ambushed a spotted cucumber beetle in the Häagen-Dazs Honey Bee Haven at the Harry H. Laidlaw Jr. Honey Bee Research Faciility on Bee Biology Road, UC Davis.
It was "good guy vs. bad guy."
It was "beneficial insect vs. major agricultural pest."
The assassin bug (Zelus renardii) is a force to be reckoned with, especially when it comes to a spotted cucumber beetle (Diabrotica undecimpunctata).
The assassin bug wears no white hat but it should. A cunning predator, it lies in wait and stabs an unsuspecting prey with a lethal toxin powerful enough to paralyze and dissolve tissue.
Then it's all over but the feeding.
The assassin bug sort of looks like a cartoon character, with its beady eyes, long beak (proboscis) and its long, slender antennae.
The spotted cucumber beetle looks a little like a ladybug (aka lady beetle) except for its coloration. It's a 12-spotted greenish-yellow insect. And a pest. Diabrotica dines on young, tender plants like cucumbers, squash, pumpkins and melons (cucurbits). It also transmits a virus.
So it was the good guy vs. the bad guy. Zelus vs. Diabrotica.
This time the good guy won.
That loud cheering sound you hear is from all the melon growers out there.
Predator and the prey: Assassin bug (left) corners a pest, a spotted cucumber beetle. (Photo by Kathy Keatley Garvey)
Assassin bug stabs the spotted cucumber beetle. (Photo by Kathy Keatley Garvey)
Assassin bug wins. (Photo by Kathy Keatley Garvey)
Assassin bug dining on spotted cucumber beetle. (Photo by Kathy Keatley Garvey)