Backyard Orchard News
In the San Joaquin Valley, the warm weather has stimulated quite a bit of fall flush. Citrus leafminer loves these new leaves and is attacking all varieities of citrus vigorously. While the damage is unsightly, most varieties of mature trees can take this damage and continue to grow at a normal rate. Nursery trees, new plantings, limes, and lemons with multiple crops in coastal California need insecticides to reduce the damage.
What's a fly doing there?
Just soaking up the sun.
A fly that landed on one of the two colorfully painted beehive columns that grace the entrance to the Häagen-Dazs Honey Bee Haven at the University of California, Davis, seemed like part of the scene.
The haven, a half-acre bee friendly garden planted next to the Harry H. Laidlaw Jr. Honey Bee Research Facility on Bee Biology Road, draws many a visitor--and many an insect. It is open year around.
We spotted this fly next to a painting of a honey bee in flight.
It knows a good spot when it sees one.
Between the Branches
That would be "the rapidly evolving soapberry bugs."
Hugh Dingle, emeritus professor of entomology at UC Davis, will present a UC Davis Department of Entomology seminar from 12:10 to 1 p.m. on Wednesday, Nov. 10 in 122 Briggs Hall.
His topic: "And the Beak Shall Inherit: Contemporary Local and Reverse Evolution in Morphology and Life History in American and Australian Soapberry Bugs."
Professor Sharon Lawler of the Department of Entomology faculty will introduce him.
During his 20-year tenure on the UC Davis faculty, Dingle studied various aspects of insect migration “and especially the relation between migration and the evolution of life histories.”
“One aspect of these studies,” he said, “was the rapid contemporary evolution of insects (soapberry bugs) on introduced host plants (golden rain trees), including the interesting genetic relationships between feeding habits and variation in the ability to fly and migrate.”
His seminar will focus on laboratory-selection experiments on North American soapberry bugs designed to assess the genetic relationships among rapidly evolving traits, including the feeding apparatus and the structure and function of wings and wing muscles, necessary to migratory behavior.
“The bugs respond rapidly to selection for both forward and reverse evolution, demonstrating that the genetic variation necessary for evolution is present in the bugs even after intense natural selection,” Dingle said.
Of particular interest is a genetic correlation between mouthpart structure and wing morph frequency so the two traits share genes and evolve together. “The ecology of the bugs reveals why this might be the case,” he said. “A similar rapidly evolving soapberry bug system exists in Australia allowing intercontinental comparisons of contemporary evolution in these bugs as a consequence of the introduction of exotic host plants.”
For the last seven years, Dingle has been living and doing research at the University of Queensland, Brisbane, Australia. Now a resident of Davis, he is continuing his research from his headquarters in the Lawler lab.
Dingle received his bachelor's degree in zoology, with honors, from Cornell University, and his master's and doctorate degrees in zoology from the University of Michigan.
Meanwhile, be sure to check out UC Davis researcher Scott Carroll's website on soapberry bugs. Carroll, also associated with the Lawler lab, maintains a Flickr site and invites images of soapberry bugs.
Evolution in action...
So you're thinking about becoming a backyard beekeeper...
What considerations are involved?
Honey bee guru Eric Mussen, Extension apiculturist and member of the UC Davis Department of Entomology faculty, has just revised his Bee Brief on "Getting Started in Beekeeping," posted on the department's website.
"One of your most important considerations," Mussen says, "is the safety of family members and neighbors." Indeed, someone might be allergic to bee stings and require immediate medical attention.
"The only way to find out is to ask the neighbors, and this will allow you to find out whether or not there is serious opposition to your keeping bees in the neighborhood," Mussen says.
Among the other considerations:
1. Over how much of the year will nectar and pollens be available to the bees? Will you have to feed the bees to ensure their survival?
2. Over how much of the year will water be available to the bees? They need it every day.
3. What will the bees be flying over to get their food and water? They defecate in flight and bee feces can damage finishes on cars and leave colored spots on everything below them. Also, will they be flying across a pedestrian, bicycle or equestrian pathway? If so, they have to be encouraged to gain altitude quickly by installing fencing or solid, tall plantings near the hives.
4. Is the apiary accessible year around? Flooding at or near the apiary site is the usual problem.
5. Try to avoid low spots. They hold cold, damp air for prolonged periods.
6. Try to avoid hilltops. They tend to be windy.
Mussen goes on to talk about beekeeping equipment, costs, knowledge of diseases, beekeeping journals, and the "bible" on honey bees, the 1324-page book: The Hive and the Honey Bee.
It's a good idea to join a local beekeeping organization and get tips from the veterans.
Beginning beekeeping books? Mussen points out that Kim Flottum, editor of Bee Culture magazine, recently published a 167-page book, The Backyard Beekeeper, and that UC Davis emeritus professor Norman Gary (and bee wrangler) has written a beekeeping book, The Honey Bee Hobbyist, due out in November or December.
There's a wealth of information out there to help you get started.
Honey Bee on Begonia
They're called "wonder flies."
And for a good reason.
Folks wonder what they are. As native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis, says: "We non-Dipterists often refer to these flies as 'wonder flies' since most of us wonder what these tiny diverse flies are."
We recently spotted these "wonder flies" in Napa sharing a squash blossom with honey bees.
Flies are pollinators, too!
If you wonder about these flies, check out BugGuide.Net, where entomologists and others congregate to share "observations of insects, spiders, and other related creatures."