Posts Tagged: wasp
Say you're a caterpillar or an aphid and a wasp comes along and lays her eggs inside you. Her eggs will hatch and then her offspring will eat their way out. You, the host, are no more. Zero. Zip. Zilch.
If you visit the Bohart Museum of Entomology open house on Sunday, Jan. 11 on the University of California, Davis, campus, you'll learn all about parasitoids.
The fun, educational and family-friendly event is themed, "Parasitoid Palooza!" Free and open to the public, it takes place from 1 to 4 p.m. in Room 1124 of the Academic Surge Building on Crocker Lane,
"Most everyone knows that mantids eat other insects or that ladybird beetles (lady bugs) consume lots of aphids, but there is another way insects eat other insects," commented Tabatha Yang, education and outreach coordinator.
"An insect parasitoid is a species whose immatures live off of one insect host, usually eating it from the inside out," she said. "It is part of their life cycle and the host dies. This sounds like a weird way to make a living, but there are more species of parasitoids than there are insects with any other single kind of life history. The movie Alien with Sigourney Weaver co-opts this phenomenon, but in reality there are no parasitoids on humans or other vertebrates."
The Bohart open house will spotlight this unusual life cycle. Wasps, flies and beetles are parasitoids to many different insect groups.
Senior museum scientist and collections manager Steve Heydon, is a world authority on Pteromalids, or jewel wasps, a group of tiny parasitoids, and will be on hand to talk about them.
Live parasitoids from the lab of Michael Parrella, professor and chair of the UC Davis Department of Entomolology and Nematology will be showcased. They include Encarsa, Eretmocerus, Diglyphus and Aphidius.
"Parasitoid Palooza" promises to be a fun and wacky celebration of the diversity of life, Yang said. A family-friendly craft activity with balloons inside of balloons (representing parasitoids) is planned.
Before you go, be sure to check out Wired.Com's piece on a wasp from the genus Glyptapantele laying eggs in a caterpillar. Tachinid flies also provide biological control services, laying their eggs in a number of insects, including beetles, moths, sawflies, earwigs and grasshoppers.
Along with parasitoids, visitors will see some "teddy bear" bees or male Valley carpenter bees, to be shown by native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis. Allan Jones of Davis, a noted insect photographer, delivered some to Thorp's office in the Harry H. Laidlaw Jr. Honey Bee Research Facility last week. Their origin? A friend's felled apple tree in Davis. The tree had rotted and male and female Valley carpenter bees were wintering inside.
The Bohart Museum, directed by Lynn Kimsey, professor of entomology at UC Davis, houses a global collection of nearly eight million specimens. It is also the home of the seventh largest insect collection in North America, and the California Insect Survey, a storehouse of the insect biodiversity.
Special attractions include a “live” petting zoo, featuring Madagascar hissing cockroaches, walking sticks and tarantulas. Visitors are invited to hold the insects and photograph them. The museum's gift shop, open year around, includes T-shirts, sweatshirts, books, jewelry, posters, insect-collecting equipment and insect-themed candy.
The Bohart Museum's regular hours are from 9 a.m. to noon and 1 to 5 p.m. Mondays through Thursdays. The museum is closed to the public on Fridays and on major holidays. Admission is free. Open houses, focusing on specific themes, are held on weekends throughout the academic year.
The remaining schedule of open houses:
- Sunday, Feb. 8: “Biodiversity Museum Day,” noon to 4 p.m.
- Saturday, March 14: “Pollination Nation,” 1 to 4 p.m.
- Saturday, April 18: UC Davis Picnic Day, 10 a.m. to 3 p.m.
- Sunday, May 17: “Name That Bug! How About Bob?” 1 to 4 p.m.
- Saturday, July 18: “Moth Night,” 8 to 11 p.m.
More information is available by contacting Tabatha Yang, education and public outreach coordinator at email@example.com or (530) 752-0493.
A wasp (family Aphidiinae) parasitizing an aphid. (Photo by Fran Keller, who received her doctorate in entomology this year from UC Davis.)
We saw her touch down in our nectarine tree last weekend.
Big green compound eyes glowed at us.
She moved up and down a branch, foraging for food, and then took off.
A wasp. The carnivore cousin of the vegetarian honey bee. They belong to the same order, Hymenoptera.
The green-eyed wasp? Genus Tachytes, as confirmed by noted "wasp woman" Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology at the University of California, Davis. The green eyes are a distinguishing feature of the genus.
Tachytes is a member of the Crabronidae family or "sand-loving wasps." The females burrow into sandy soil, and provision their nest with such paralyzed prey as katydids and grasshoppers. Meanwhile, their cousins, the honey bees, are out collecting nectar and pollen.
If you're looking for something to do this summer, be sure to check out the Bohart Museum, located in Room 1124 Academic Surge, corner of La Rue Road and Crocker Lane (formerly California Drive). Regular hours are from 9 a.m. to noon and from 1 to 5 p.m., Monday through Thursday. It is closed to the public on Fridays and on major holidays. Admission is free.
There's always something to see and do at the museum, what with more than seven million insect specimens collected from around the world. And you can meet the critters in the "live petting zoo," including walking sticks and Madagascar hissing cockroaches.
Be sure to check out the Hymenoptera specimens in the museum's display cases. You'll be amazed./span>
Green-eyed wasp, genus Tachytes, in a nectarine tree. This one is a female, as identified by Lynn Kimsey, director of the Bohart Museum of Entomology.(Photo by Kathy Keatley Garvey)
Green-eyed wasp, Tachytes sp., foraging on a nectarine tree. (Photo by Kathy Keatley Garvey)
A little somersault by a green-eyed wasp, genus Tachytes. (Photo by Kathy Keatley Garvey)
Do you brake for wasps?
We spotted a bumper sticker on the UC Davis campus the other day that read: "I brake for wasps."
It was parked in the Briggs Hall loading zone--Briggs is the home of the UC Davis Department of Entomology--so I imagine it was braking for wasps right then and there.
It was not a car owned by self-described "wasp woman" Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology at UC Davis.
But she wants one of those bumper stickers!
The colorful wasp below was foraging recently on an Indian hawthorn (Rhaphiolepsis umbellata 'Olivia') at the Benicia marina. Kimsey identified it as a "a solitary vespid, probably in the genus Stenodynerus. This is a male. The females feed on caterpillars."
Of these wasps: "They are pretty interesting," Kimsey said. "The males have the last antennal segment like a finger folded up against the adjacent segment. You can see it in one of the photos."
Solitary vespid foraging on Indian hawthorn at the Benicia marina. (Photo by Kathy Keatley Garvey)
Upside down, a solitary vespid checks out its surroundings. (Photo by Kathy Keatley Garvey)
And away it goes. (Photo by Kathy Keatley Garvey)
It probably bugs her but it doesn't kill her.
An entomologist at the University of Montreal is investigating why parasitic wasps (Dinocampus coccinellae) that lay their eggs on ladybugs (Coccinella maculata) do not kill them.
Often a parasitic insect, such as a tachinid fly, kills its host.
"What is fascinating is that the ladybug is partially paralyzed by the parasite, yet it's eventually released unscathed," says biocontrol specialist and professor Jacques Brodeur. "Once liberated, the ladybug can continue to eat and reproduce as if nothing happened."
It works like this: a larva cocoons between the ladybug's legs. Once the parasite matures, it leaves the host. Brodeur hopes to understand the cycle duration, success rate and the host-parasite relationship.
Talk about hostage-taking.
"Can the ladybug refuse to be used?" he wonders. "We don't know. Our plan is to reproduce a variety of situations in the lab and see which is most favorable to reproduction."
Luck be a lady?
Frankly, we're happy that the aphid-eating ladybug, one of our favorite beneficial insects, doesn't succumb to the wasp.
We need more of them around.
Searching for More Aphids