- Author: Kathy Keatley Garvey
Ever seen assassination attempts in your garden?
They are not pretty if you're the prey. Neither are the successful attempts.
Take the Zelus renardii, aka the leafhopper assassin bug.
They've been hanging out in our nectarine tree, cosmos, passionflower vine and Cleveland sage. They stalk or lie in wait and then jab their prey with their long rostrum, injecting a lethal saliva. Next: they suck out the contents. They "assassinate" such pests as aphids, leafhoppers, and caterpillars of the cabbage white butterfly.
Assassin bugs also feed on beneficial insects, too, such as bees, lacewings and lady beetles, aka ladybugs.
They're often confused with kissing bugs. Can "assassin bugs can carry Chagas disease, which can transmit to humans?" a reader asked.
We asked noted entomologist Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology at UC Davis, for comment and clarification.
"Assassin bugs and kissing bugs belong to the same family of insects, the Reduviidae," Kimsey said. "However, biologically they are very different. Kissing bugs belong to 20 or more species in the subfamily Triatominae. They are nocturnal blood feeders, and you almost never see them during the day. Most of these species in California are infected with the protozoan that causes Chagas disease, but because of differences in how they feed, few if any can actually transmit it to humans."
"The pathogen is transmitted in their droppings and have to be inhaled or scratched into the skin," Kimsey pointed out. "This only happens if the kissing bug defecates during feeding. The California species do not defecate until they leave the host and go back to a resting site, so the chances of getting Chagas disease from a bug in California are cosmically small. The assassin bugs you see during the day belong to an entirely different group of reduviids. They are all predators on other insects. Some of them, like the common garden assassin bug Zelus, are irritable biters but they do not transmit any kind of pathogen to anything."
- Author: Kathy Keatley Garvey
She's in Vacaville, Calif., and the garden she is visiting today is a veritable oasis of blooms: Mexican sunflower (Tithonia rotundifolia), butterfly bush (Buddleia davidii) and lavender (Lavandula). And it's filled with bees.
That's why she's here.
Just as crooks rob banks because "that's where the money" is, predators hang around pollinator gardeners because "that's where the prey is."
The predator is hungry. Ah, what's that? She glides from her perch, her wings glowing in the morning sunshine. She circles the garden and quickly returns with a pollen-laden bee in her mouth.
She ignores the photographer sitting a few feet from her and begins to eat.
But what bee? What bee is on the dragonfly menu?
Native pollinator specialist Robbin Thorp, distinguished professor of entomology at the University of California, Davis, identified the bee from one photography angle (second photo below): a female sweat bee, genus Halictus.
"But what species?" asked Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology at UC Davis.
Here's another angle (first photo below), showing the head.
That's all it took. "The bee is a female of Halictus ligatus, based on the head shape, especially the pointed part of the back right side of the head," Thorp said.
Amazing. Who would know that?
Robbin Thorp, that's who.
Robbin Thorp knows bees like we know the way home. World-renowned for his bee expertise, he co-authored of California Bees and Blooms: A Guide for Gardeners and Naturalists, and Bumble Bees of North America: An Identification Guide and co-teaches at The Bee Course, an American Museum of Natural History workshop held annually at the Southwestern Research Station, Portal, Ariz. The workshop is geared for conservation biologists, pollination ecologists and other biologists who want to gain greater knowledge of the systematics and biology of bees. This year's workshop is set Aug. 21-31.
Meanwhile, the dragonfly polishes off her meal, gazes at the photographer (What, are you still here? Sorry, I don't share!), and off she goes, zigzagging over the garden.
She will be back. She's punched only one hole of his meal ticket. Many holes--and many bees--remain.
- Author: Kathy Keatley Garvey
Members of the North American Forensic Entomology Association (NAFEA) will be special guests and presenters at the open house hosted from 1 to 5 p.m., Sunday, July 9 at the Bohart Museum of Entomology.
The event, free and open to the public, takes place in the Bohart Museum, located in Room 1124 of the Academic Surge Building on Crocker Lane, UC Davis campus.
NAFEA is meeting for a conference at UC Davis July 7-12 and the Bohart open house will be part of its outreach activities. The scientists will field questions throughout the event.
"We'll have scientists from across the country here at this family-friendly event,” said Tabatha Yang, the Bohart Museum's education and outreach coordinator. Family arts and crafts activities are featured at each open house. A popular activity planned for the July 9th open house is maggot art, in which maggots are dipped into non-toxic, water-based paint and placed on a “canvas” (paper) to crawl around and create a painting. The activity, coined by entomologist Rebecca O'Flaherty, a former graduate student at UC Davis, is a traditional part of the UC Davis Department of Entomology and Nematology's Briggs Hall offerings at the campuswide UC Davis Picnic Day.
Forensic entomologist Robert Kimsey of the UC Davis Department of Entomology and Nematology served as president of the organization in 2015. (See news feature about Kimsey, "The Fly Man of Alcatraz.") Current president is Jason Byrd of the Department Pathology, Immunology and Laboratory Medicine University of Florida College of Medicine. The goal of NAFEA is to promote the development of forensic entomology throughout North America and to encourage co-operation with other similar international bodies. NAFEA defines its mission as “to provide a cooperative arena for forensic entomologists to interact and collaborate in ways that enhance the science, moral and ethical foundation, and reputation of forensic entomology.”
The fly photo below is of a male flesh fly (Sarcophagidae), "very likely genus Sarcophaga" (http://bugguide.net/node/view/458576/bgimage), according to senior insect biosystematist Martin Hauser of of the Plant Pest Diagnostics Branch, California Department of Food and Agriculture.
The July 9th open house is one of three open houses scheduled this summer. The others are:
Saturday, July 22, Moth Night from 8 to 11 p.m.: Moth Night, held in conjunction with National Moth Week, will enable visitors to explore nighttime nature through a blacklighting setup, enabling the collection of moths and other insects. The event takes place in the courtyard in back of the Bohart Museum. The museum will be open throughout Moth Night.
Sunday, Aug. 27: Bark Beetles and Trees, Forest Health in California, from 1 to 4 p.m.: The event is in collaboration with Steve Seybold, USDA Forest Service entomologist and an associate of the UC Davis Department of Entomology and Nematology. He and his students and staff will be there to show displays and answer questions.
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. Noted entomologist Richard M. Bohart (1913-2007) founded the museum.
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, Saturdays and Sundays and on major holidays. Admission is free.
More information on the Bohart Museum is available by contacting (530) 752-0493 or email bmuseum@ucdavis.edu.
Traffic: Note that Old Davis Road that goes past the Visitors' Information Center will be closed due to construction of a paving project (https://www.ucdavis.edu/news/paving-project-close-old-davis-road/) Visitors should enter the campus via Highway 113 and take the Hutchison exit. The parking lot closest to the Bohart Museum is Lot 46.
- Author: Kathy Keatley Garvey
Hmmm, run that by again?
We've all written "please-let-me-do-this-over-again" answers on our tests, right? Too much coffee, too little time, too much anxiety, and too little comprehension? And no spell-check or thought-check? Check!
Professor Lynn Kimsey of the UC Davis Department of Entomology and Nematology--she's probably better known for her role as director of the Bohart Museum of Entomology--collects the strange, funny and odd answers that students pen on her tests in her Entomology 100 class.
Here's a sampling of her favorites from spring 2017:
- Locust go under behavioral, morphological, and physiological changes in a rapid amount of time with no warning.
- Because this is the lethal range of bed bugs, this will cause all of them to die without damaging or moving any furniture around the house.
- The danger of neonicotinoids are not in question, but rather there is still discussion on whether they are the primary source of alarm for honeybees when there are many other artificial chemicals they are equally exposed to.
- A large variety of evidence been presenting itself regarding this topic with many such papers contrasting what has previously been deemed certain.
- The spraying of insecticide is a very effective means of eliminating large areas of land where tsetse flies are commonly found.
- In understanding succession of insects, forensic entomologists can piece together the estimated time frame of when specific insects would have taken part in the decomposition of decaying carcasses and can provide a reasonable date of when the carcass would have died.
- This succession of insects is more important for dead carcasses that have been eaten off of for a long time.
- Seeing the oozing and blackened lesions, cysts, and tumors wrapping around its dead or dying victims, Europeans referred to plague as the Black Death, and they saw it as the end of the world.
- A disease such as this is easily dispersed by the vector flies and also infected mammals but especially in humans who, now more than ever, can travel long distances in very short periods of time.
- For example, C. thalictra, was first recorded participating in hematophagous behaviors when a scientist working on the project tested if the moth would feed on its finger.
- The number of those killed by bee sting is increasing yearly because of aggressive Africanized honeybees that are taking control of Texas.
- The idea that a minuscule mosquito could help transmit some of the most important pathogens of global diseases, was not an easy idea to grasp.
- On the head, they also have long, filiform antennae and mandibles for digestion and mating.
- In climates such as Sacramento, California native adults will begin to emerge in spring and summer months.
- Ants live a very foraging lifestyle, which allows them to have a mutualistic relationship with both insects and plants, as well as a parasitic relationship with their own kind.
- Today they use their large frame, powerful sting, and pure wit to dominate areas throughout Central and South America.
- Fleas do not "jump" like mammals do; fleas charge their elasticated legs with tensity, like a drawn bowstring, then shoot themselves through air.
- Due to their multi-stage, holometabolous lifecycle, fleas are not only talented at infesting their animal hosts, but also the dwellings of their hosts-such as houses, towns, cities, all of which harbor innumerable flea colonies.
- As Y. pestis grows in the proventriculus, they disturb the valvular function of the proventriculus, caushing a gut bloackage.
- Drones are distinguished from other bees in that they do not have a stinger.
- The fungi allows it to protect itself from harsh environment of the soil where it thrives.
- It is unknown if the hematophagous behavior is capable of transmitting disease between the same or different species, but if it were to, perhaps the safety from the moth would come into question giving this facilitative hematophagg ous group of organisms mirror like acknowledgment from that of obligatory hematophagous groups of organisms.
- Yet, the more feasible harm the moths would have on humans or other organisms' safety is in the agricultural realm.
- Nevertheless, bee stings can cause fatal effects on people in the United States; being among the direct deaths caused by animals since the allergic reaction of the poison kills 53 individuals every year.
- The female worker bees carry out large number tasks that are necessary for the continued existence of the hive thus they exist for six weeks due to constant laboring.
- These species are found exclusively in the Americas, or New World, and thrive throughout much of North and South America.
- Most species are seed harvesters, leaving the nest to collect resources and a variety of other items including dead or dying insects unlucky enough to wonder in their path.
- Though unclear how and when Triatoma infestans became domesticated, some predictions claim that it was first introduced into the human environment via vector transition from rodents inside their burrows to cave-like pre-Columbian peoples
- Killer bees can pursue people for more than a quarter mile when they are animated and antagonistic and die once they sting since the stingers are located at their abdomen.
- Author: Kathy Keatley Garvey
So, here I am, an Asian lady beetle (Harmonia axyridis) perched on a rose bush in Vacaville, Calif., as dawn breaks. I'm eating aphids and minding my own beetle business, which consists of gobbling aphids and more aphids. And more aphids. Did I say more aphids? More aphids.
Wait, what's that? Something is heading straight toward me, its wings are flapping like crazy. Hey, I was here first. Go away!
Whoa, what are you doing? You've landed and you're licking me. What do you think I am, a honey stick?
That's what happened during a backyard encounter with an Asian lady beetle and a large syrphid fly. The fly, identified by senior insect biosystematist Martin Hauser of the Plant Pest Diagnostic Branch, California Department of Food and Agriculture, is a female Scaeva pyrastri.
Hauser and Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology at UC Davis, agreed that the syrphid fly is "going after honeydew on the beetle's head." Honeydew is a sugary, sticky liquid that aphids secrete when they're feeding on plant juices.
"The beetle was full of honeydew from feasting on aphids," Hauser noted, "and that is what the fly was after."