As concern grows over the decline in the honey bee population, alternative pollinators are gaining attention. Mason bees, which are native to North America, are one option. These gentle-natured bees do not produce honey but they excel at pollinating and are easy to raise.
The mason bee is a solitary bee which lives in natural cavities such as woodpecker holes or hollow stems. They also seem to be just as happy in artificially-constructed nests, so long as these nests include tubes made of cardboard or paper where the female bee can lay her eggs.
Purpose-built nests, often called bee boxes, are set out in early spring when daytime temperatures regularly reach 55 degrees. The bee box is placed outside, facing south in a location that is sunny but protected from wind and rain. Because mason bees will not fly farther than three hundred yards from their nest, bee boxes must be located within range of fruit trees and flowering plants.
The mason bee gathers pollen on her underside. As she zig-zags among the blossoms she is picking up and dropping off pollen, thus pollinating the flowers as she travels. One mason bee can pollinate 2,000 blossoms in a single day. She brings pollen back to her nest and deposits it at the back of the tube, making a mound on which she will lay one egg. She then seals the space off with mud to create a cell. It is because they use mud in their nest construction that they are called mason bees.
All this activity can be closely watched since the bees don't sting. The female can be seen heading into her chamber when she is laden with pollen, and backing into her chamber when she is about to lay an egg. Sometimes she just likes to rest in the front of the chamber. This activity continues for six to eight weeks, and then the mother bee dies.
Mason bee larvae hatch a few days after their eggs are laid. The larvae eat the pollen the mother has provided and then each larva goes into a pupal stage. The following spring, the adult bees emerge. The males emerge from the nest first, the females follow, and the process begins all over again.
More information on mason bees can be found at the Crown Bees website.
UC Master Gardeners of Butte County are part of the University of California Cooperative Extension (UCCE) system. To learn more about us and our upcoming events, and for help with gardening in our area visit our website. If you have a gardening question or problem, email the Hotline at mgbutte@ucanr.edu or leave a phone message on our Hotline at 530-552-5812. To speak to a Master Gardener about a gardening issue, or to drop by the MG office during Hotline hours, see the most current information on our Ask Us section of our website.
- Author: Kathy Keatley Garvey
The podcast, "The Buzz on Native Bees in Your Neighborhood," is online.
"When I say 'bees,' you probably think of a neat stack of white hive boxes and the jars of honey on the store shelves, right?" Flatow began. "But there's a lot more to bees than that. Because around the world, there are over 20,000 known bee species, and 4,000 of them are native to the U.S. And while these native bees that live in the wild play a key role in pollinating our plants, they don't get a ton of recognition or support like the ones that live in a box."
Professor Williams discussed a number of bee species, including bumble bees, carpenter bees, squash bees, mining bees ("bees that burrow into the ground or soil") and mason bees and leafcutter bees.
Mason bees, Williams said, build their nests "partly out of mud, which then dries. And the leafcutter bees are chewing pieces of leaves and making their nests out of those leaf pieces, either as whole chunks of leaves or as chewed up bits of leaves. We have a series of other small to large bees that nest on the ground or nest above ground that fall into other families. But probably those are the most familiar for most people."
Williams called attention to research led by his then graduate student, and now postdoctoral fellow, Maureen Page, who compared "the quality of honey bees at pollinating flowers versus the quality of other bees. And in general, we find that honey bees are sort of equal or slightly less good than many other bees. And the old adage, the jack of all trades is the master of none--the honey bee is really that jack of all trades. It's very wide in the number of flowers that it will visit, but doesn't tend to be particularly effective on any one flower visit relative to some of the other bees we have."
The alfalfa leafcutter bee "is a really effective pollinator relative to the honeybees at pollinating alfalfa," he told Flatow.
"So your bumble bee is sort of the lab animal, then," Flatow commented. "It's not a white mouse. It's a bumble bee."
Williams agreed. "It's become a pretty useful organism for studying things in the lab. I should say the other group that we work a lot with are mason bees and leafcutter bees. And because of the way they nest, they have been really useful for studying other sorts of questions. So there are a couple of groups that we work well with."
Williams also touched on the threats faced by native bees. In addition to pesticides (insecticides, fungicides, and herbicides), "they're threatened by the loss of reliable foraging floral resources," Williams said. "They are threatened by a set of emerging diseases. And this is, again, where the honey bee gets a lot of attention, right? This colony collapse may be resulting from certain viruses, but wild bees, native bees, also have some substantial problems with certain viruses and also other kinds of pathogens."
"And then a really big one is climate change. So we have to fully recognize that changes in rainfall and also changes in temperature patterns seem to be stressing bees in different parts of the U.S., for sure."
Flatow, whose colleagues say has "revived many an office plant at death's door," asked: "Can I plant a little patch of wild flowers in a pot or in the yard and really help out?"
"This is also one of these questions that's a complex one, but we'll try not to make it too complex," Williams said. "I mean, in general, planting flowers for bees is a useful thing. The one thing we'd want to be careful about if we were planting flowers in the yard is that we were also being careful about the use of some of these chemical pesticides. But I think also recognizing the importance of natural areas and broader stewardship of habitat for bees across the landscape is really important. And this tricky one with climate change, too--what are we going to do? We don't solve climate change with the sorts of things that we would do– small-scale actions--to help bees."
"But we can do some things probably--providing shady spots, where they have what we call microclimates that are maybe protecting them from times where there are heat waves that are particularly problematic--things like that that could be useful."
Williams, who joined the UC Davis Department of Entomology and Nematology faculty in 2009, was named a Chancellor's Fellow in 2015, a five-year program supporting his research, teaching and public service. He was named a a Highly Cited Researcher by Clarivate Analytics in 2018, and a Fellow of the California Academy of Sciences in 2021.
A native of Madison, Wisc., he received his doctorate in ecology and evolution from Stony Brook University, New York in 1999.
Resources:
- Neal Williams, biography, Wikipedia
- Neal Williams lab, UC Davis Department of Entomology and Nematology
- Evidence of exploitative competition between honey bees and native bees in two California landscapes by Maureen Page and Neal Williams, June 2023, Journal of Animal Ecology
- Honey bee introductions displace native bees and decrease pollination of a native wildflower by Maureen Page and Neal Williams, December 2022, Journal of Ecology
- A meta-analysis of single visit pollination effectiveness comparing honey bees and other floral visitors by Maureen Page, Charlie Nicholson, Ross Brennan and Neal Williams, October 2021, American Journal of Botany
- Author: Kathy Keatley Garvey
You can learn more about native bee and their importance when pollination ecologist Neal Williams, professor, UC Davis Department of Entomology and Nematology and a 2015-2020 Chancellor's Fellow, present a talk on "Pollination, the Importance of Native Bees and How to Promote Them" at the California Honey Festival on Saturday, May 6.
The annual event, free and family friendly, takes place from 10 a.m. to 5 p.m., in downtown Woodland.
"Pollination by insects, mostly bees, is critical to human wellbeing," Professor Williams said. "An astonishing 75 percent of food crops benefit to some extent from pollination, most of it provided by managed and wild bees. When thinking about pollination of crops, most of us consider honey bees–and they are a critical part of crop pollination. However, native bees also play an important role and in some cases are better pollinators of crops than honey bees. In the presentation, I will provide an overview of the diversity, life history and biology of native bees. I will then discuss how we can use an understanding of bee biology to help sustain and promote diverse communities of wild bees."
Williams' research interests include pollination ecology, bee biology with emphasis on foraging behavior, ecology and evolution of trophic specialization and plant-pollinator interactions, landscape change and community dynamics, ecosystem services and conservation
The California Honey Festival, launched in 2017 to celebrate the importance of bees and to promote honey and honey bees and their products, last year drew a crowd of 40,000.
Amina Harris, director of the UC Davis Honey and Pollination Center, Robert Mondavi Institute, and a co-founder of the festival, announced the list of speakers who will deliver 20 to 30-minute talks on the UC Davis Speakers' Stage, located just west of First Street.
10:30 a.m.: Pollination ecologist and professor Neal Williams, UC Davis Department of Entomology and Nematology, who will discuss "Pollination, the Importance of Native Bees and How to Promote Them"
11 a.m.: Kitty Bolte, GATEways horticulturist, UC Davis Arboretum and Public Garden, "Planting Your Garden to be a Welcoming Space for Pollinators"
12 noon: Amina Harris, director of the UC Davis Honey and Pollination Center, and co-owner of Z Food Specialty and The HIVE, Woodland, "Let's Learn to Taste Honey."
1 p.m.: Wendy Mather, co-program manager of the California Master Beekeeper Program (CAMPB), "So, You Want to Be a Beekeeper?"
1:30 p.m.: Jean-Philippe Marelli, senior director of Integrated Pest Management for Mars Wrigley Confectionery (also a journey level master beekeeper and Melipona beekeeper in Brazil), "Stingless Bees: The Amazing World of Melipona Bees"
2 p.m.: Cooperative Extension apiculturist/associate professor Elina Lastro Niño of Entomology and Nematology, and director of the California Master Beekeeper Program (CAMPB), "What Our Bee Research Is Teaching Us."
2:30 p.m.: Sanmu "Samtso" Caoji, a 2022-23 Hubert Humphrey fellow, and founder of the Shangri-la Gyalthang Academy, and CEO of the Cultural Information Consulting Company, "Empowering Women to Become Beekeepers and Bread Winners for Their Families While Keeping Bees in the Wild"
3 p.m.: Rachel Davis, coordinator of Bee City USA Woodland and chair of Bee Campus USA UC Davis (GATEways Horticulturist for the UC Davis Arboretum and Public Garden), "Woodland Is a Bee City; UC Davis Is a Bee City--What This Means to Our Communities"
UC Davis Department of Entomology and Nematology communications specialist Kathy Keatley Garvey will provide a background slide show of honey bees and native bees.
The event is both educational and entertaining. Attendees can taste honey, check out the bee observation hives, watch cooking demonstrations and kids' shows, taste mead and other alcoholic drinks (if of age) and learn about bees from beekeepers and bee scientists. Vendors, offering various products and food, will line the streets.
The UC Davis-based California Master Beekeeper Program, founded in 2016 by Niño, provides a program of learning, teaching, research, and public service. They offer comprehensive, science-based information about honey bees and honey bee health. Since 2016, the organization has donated 32,000 hours of volunteer time and served 186,630 individuals in education, outreach and beekeeping mentorship. Read more about their classes and their work on their website.
An after-party will be held from 5 to 9 p.m. at The HIVE Tasting Room and Kitchen, 1221 Harter Ave., Woodland. It will feature pollinator-inspired food, drinks, and dancing to the music of Joy and Madness, an 8-piece soul and funk group. Tickets are $20 and will benefit the California Master Beekeeper Program. "Each ticket includes entry to win a bountiful Yolo County food and drink basket (value $500)," Harris said. More information is on this website.
- Author: Kathy Keatley Garvey
The annual event, free and family friendly, takes place from 10 a.m. to 5 p.m., Saturday, May 6 in downtown Woodland.
Pollination ecologist Neal Williams, professor, UC Davis Department of Entomology and Nematology and a 2015-2020 Chancellor's Fellow, will present a talk on "Pollination, the Importance of Native Bees and How to Promote Them" at 10:30 a.m. on the UC Davis Speakers' Stage.
"Pollination by insects, mostly bees, is critical to human wellbeing," Professor Williams said. "An astonishing 75 percent of food crops benefit to some extent from pollination, most of it provided by managed and wild bees. When thinking about pollination of crops, most of us consider honey bees–and they are a critical part of crop pollination. However, native bees also play an important role and in some cases are better pollinators of crops than honey bees. In the presentation, I will provide an overview of the diversity, life history and biology of native bees. I will then discuss how we can use an understanding of bee biology to help sustain and promote diverse communities of wild bees."
Williams' research interests include pollination ecology, bee biology with emphasis on foraging behavior, ecology and evolution of trophic specialization and plant-pollinator interactions, landscape change and community dynamics, ecosystem services and conservation;
The California Honey Festival, launched in 2017 to celebrate the importance of bees and to promote honey and honey bees and their products, last year drew a crowd of 40,000.
Amina Harris, director of the UC Davis Honey and Pollination Center, Robert Mondavi Institute, and a co-founder of the festival, announced the list of speakers who will deliver 20 to 30-minute talks on the UC Davis Speakers' Stage, located just west of First Street.
10:30 a.m.: Pollination ecologist and professor Neal Williams, UC Davis Department of Entomology and Nematology, who will discuss "Pollination, the Importance of Native Bees and How to Promote Them"
11 a.m.: Kitty Bolte, GATEways horticulturist, UC Davis Arboretum and Public Garden, "Planting Your Garden to be a Welcoming Space for Pollinators"
12 noon: Amina Harris, director of the UC Davis Honey and Pollination Center, and co-owner of Z Food Specialty and The HIVE, Woodland, "Let's Learn to Taste Honey."
1 p.m.: Wendy Mather, co-program manager of the California Master Beekeeper Program (CAMPB), "So, You Want to Be a Beekeeper?"
1:30 p.m.: Jean-Philippe Marelli, senior director of Integrated Pest Management for Mars Wrigley Confectionery (also a journey level master beekeeper and Melipona beekeeper in Brazil), "Stingless Bees: The Amazing World of Melipona Bees"
2 p.m.: Cooperative Extension apiculturist/associate professor Elina Lastro Niño of Entomology and Nematology, and director of the California Master Beekeeper Program (CAMPB), "What Our Bee Research Is Teaching Us."
2:30 p.m.: Sanmu "Samtso" Caoji, a 2022-23 Hubert Humphrey fellow, and founder of the Shangri-la Gyalthang Academy, and CEO of the Cultural Information Consulting Company, "Empowering Women to Become Beekeepers and Bread Winners for Their Families While Keeping Bees in the Wild"
3 p.m.: Rachel Davis, coordinator of Bee City USA Woodland and chair of Bee Campus USA UC Davis (GATEways Horticulturist for the UC Davis Arboretum and Public Garden), "Woodland Is a Bee City; UC Davis Is a Bee City--What This Means to Our Communities"
UC Davis Department of Entomology and Nematology communications specialist Kathy Keatley Garvey will provide a background slide show of honey bees and native bees.
The event is both educational and entertaining. Attendees can taste honey, check out the bee observation hives, watch cooking demonstrations and kids' shows, taste mead and other alcoholic drinks (if of age) and learn about bees from beekeepers and bee scientists. Vendors, offering various products and food, will line the streets.
The UC Davis-based California Master Beekeeper Program, founded in 2016 by Niño, provides a program of learning, teaching, research, and public service. They offer comprehensive, science-based information about honey bees and honey bee health. Since 2016, the organization has donated 32,000 hours of volunteer time and served 186,630 individuals in education, outreach and beekeeping mentorship. Read more about their classes and their work on their website.
An after-party will be held from 5 to 9 p.m. at The HIVE Tasting Room and Kitchen, 1221 Harter Ave., Woodland. It will feature pollinator-inspired food, drinks, and dancing to the music of Joy and Madness, an 8-piece soul and funk group. Tickets are $20 and will benefit the California Master Beekeeper Program. "Each ticket includes entry to win a bountiful Yolo County food and drink basket (value $500)," Harris said. More information is on this website.
- Author: Kathy Keatley Garvey
Urban entomologist Gordon Frankie, professor emeritus and research entomologist in the Department of Environmental Sciences, Policy, and Management at UC Berkeley, will be one of the speakers. He specializes in behavioral ecology of solitary bees in wildland and urban environments and co-authored the celebrated book, California Bees and Blooms: A Guide for Gardeners and Naturalists: (Heyday Books, 2014) by UC scientists, including the late Robbin Thorp, UC Davis distinguished professor of entomology. The book is available online from UC Agriculture and Natural Resources (UC ANR).
The Event: Bee Bash
Date: Saturday, April 1
Time: 10 a.m. to 3 p.m.
Place: Annie's Annuals and Perennials, 740 Market Ave, Richmond, Calif.
Cost: Free
This is Annie's Annuals' first-ever Bee Bash. Earlier the plant nursery hosted spectacular butterfly summits. Butterfly guru Art Shapiro, distinguished professor, UC Davis Department of Entomology and Nematology, keynoted the 2018 summit. (Read his remarks on Bug Squad)
The schedule of events:
10 a.m.: Jennifer Jewell: “Invitations From and To the Garden: Cultivating Places & People”
11 a.m.: John Whittlesey: “Bumble Bees--Their Natural History & Designing Gardens to Support Them”
12:30: Tora Rocha and Angela Laws: “Maintaining Native Bee Habitats”
1:30 p.m.: Gordon Frankie: “Characteristics of Pollinator Habitat Gardens”
About the speakers:
Jewell hosts the national award-winning weekly public radio program and podcast, "Cultivating Place: Conversations on Natural History and the Human Impulse to Garden." She's authored several book, including The Earth in Her Hands, 75 Extraordinary Women Working in the World of Plants (Timber Press in 2020); Under Western Skies, Visionary Gardens from the Rockies to the Pacific Coast (Timber Press, May 2021); and What We Sow, to be published later this year by Timber Press.
Whittlesey is a nurseryman, garden designer, and author of The Plant Lovers Guide to Salvias, published by Timber Press in 2014.
Rocha is the founder and leader of the Pollinator Posse, a volunteer group based in Oakland that creates “pollinator corridors” in and around the Bay Area. (Check out the Pollinator Posse Facebook page.)
Laws, a community ecologist, holds the title of Endangered Species Conservation Biologist, Xerces Society of Invertebrate Conservation.
California Bees and Blooms is the work of Frankie, Thorp, Barbara Ertter of UC Berkeley, and Rollin Coville, a UC Berkeley doctoral alumnus and photographer. Thorp, 1933-2019 (see tribute) also co-authored Bumble Bees of North America: An Identification Guide (Princeton University, 2014).
Want a card set of California's common bees to help you identify them and learn more about them? The newly published (second edition) card set, "Common Bees in California," is available on the UC ANR catalog. From the website: "Nearly 1600 species of native bees can be found in California's rich ecosystems; this colorful pocket field guide will help you identify bees commonly found in urban gardens and landscapes." Frankie is one of the co-authors.
Resource:
Native Bees Are a Rich Natural Resource in Urban California Gardens (California Agriculture, Volume 63, Number 3)