Posts Tagged: Xerces Society
So you want to attract native pollinators to your garden.
It offers a wealth of information, from identifying common bees of North America to helping you decide the best nectar-and-pollen plants for your garden.
The non-profit Xerces Society earlier announced that its Bumble Bee Garden Kit is available. The kit tells you how to attract bumble bees to your garden.
First the garden kit, then the book.
Bring on the pollinators!
Pollen-Packin' Bumble Bee
It's good to see so much interest in native bees and native plants.
At the UC Davis Department of Entomology, we're frequently contacted by folks throughout the country asking what to plant to attract pollinators--native bees, honey bees (honey bees not native; European colonists brought them over here in 1622), and other pollinators.
The Xerces Society for Invertebrate Conservation has a wonderful list of native plants on its website. You click on your region and you'll be directed to a list.
If you poke around the Xerces Society website, you can find information on why native bee habitats are important and how to create native bee habitats. Also check out the pollinator handbook and the fact sheets.
Plant lists are available to download below in PDF format.
Yellow-Faced Bumble Bee
Xerces Society scientists just developed a first-of-its-kind conservation strategy summarizing the threats facing native bees in the diverse landscapes of Yolo County and identifying measures to protect them.
And what a great conservation--and conservation--piece this is.
Their 70-page paper, Yolo Natural Heritage Program Pollinator Conservation Strategy, is designed to protect such wild bees as bumble bees, leafcutter bees, mason bees, blue orchard bees and others. (You can download the paper from the Xerces Society Web site and from the Yolo Natural Heritage Program Web site.)
“Whether you manage roadsides or run a farm there are actions that you can take to improve the health of pollinators,” says Matthew Shepherd, Xerces Society senior conservation associate and co-author of the report. “Identifying and protecting floral resources can provide significant benefit to the native bees and other pollinators in Yolo County.”
The project, funded in part by a grant from the California Department of Fish and Game, provides land managers with information vital to "save the pollinators" of Yolo County. The county includes six major landscapes: agriculture, grasslands, woodlands, shrubland and scrub, riparian and wetland, and urban and barren.
As the scientists point out, some 60 to 90 percent of the world's flowering plants depend on animals for pollination, and most of these animals are insects.
"Research shows that native bees contribute substantially to the pollination of many crops, including watermelon, canola, sunflower, and tomatoes," the report says. "The value of crop pollination by native, wild bees in the United States is estimated at $3 billion. In Yolo County, extensive studies demonstrate the significant role of native pollinators in the economic viability of agriculture. In addition, native bees provide incalculable value as pollinators of native plants."
Among the many contributors to this report: native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis; and UC Berkeley conservation biologist Claire Kremen, an affiliate of the UC Davis Department of Entomology.
This is a report well-worth reading, and even more importantly, following the measures listed to protect the health of our native bees. These beneficial insects need flowers for foraging and nest sites to raise their young. Some 70 percent of native bee species nest in the ground. Most of the others nest in cavities in trees or plant stems. "Bumble bees require a small cavity such as an abandoned rodent hole," the report indicates.
So, that black-faced bumble bee (Bombus californicus) that you see gathering pollen on a California poppy may go home to...well...a rat hole.
All the more reason to become more observant and pro-active of their needs.
Black-Faced Bumble Bee
The bumble bee population is declining and some species are teetering on the brink of extinction.
That's the gist behind why three conservation groups and bumble bee researcher Robbin Thorp, emeritus professor of entomology at UC Davis, are asking the federal government to impose regulations on the movement and health of commercial bumble bees to protect the declining native/wild bumble bee population.
A Jan. 12th press release issued by the Xerces Society for Invertebrate Conservation is drawing worldwide attention. The latest coverage came from the New York Times and the Washington Post.
Take Franklin's bumble bee. That's a bumble bee found only in a small stretch of southern Oregon and northern California. Robbin Thorp, a member of the Xerces Society, hasn't seen it for several years and fears it may be extinct.
You'll want to read the article on "Bumble Bees in Decline" on the Xerces Society Web site and look at the photos of the bumble bees that could be nearing extinction.
Two recent studies provide a direct link between diseases in commercial bumble bees and the health of wild bumble bees:
--Otterstatter, M.C., and J.D. Thomson. 2008. Does Pathogen Spillover from Commercially Reared Bumble Bees Threaten Wild Pollinators? PLoS One. Available online at http://www.plosone.org/doi/pone.0002771
--Colla, S.R., M.C. Otterstatter, R.J. Gegear, and J.D. Thomson. 2006. Plight of the Bumblebee: Pathogen Spillover from Commercial to Wild Populations. Biological Conservation 129: 461-467.
Otterstatter and Thomson note that wild bumble bees near greenhouses have higher pathogen loads (of Crithidia bombi and Nosema bombi) than bumble bees farther away from greenhouses.We're glad to see this kind of research under way and the proposed restrictions sent to the USDA. We need to protect our wild bumble bees.
Franklin's Bumble Bee
It's being hailed by environmental groups as "a victory for the bees."
A U.S. federal judge has ruled that the insecticide, spirotetramat, must be pulled from the shelves because it could be dangerously toxic to America's declining honey bee population.
Starting Jan. 15, 2010, it will be illegal for the insecticide, manufactured by Bayer CropScience under the trade names Movento and Ultor, to be sold in the United States.
What the federal court order does is invalidate EPA's approval of the use of the pesticide.
U.S. District Court Judge Denise Cote ruled that the EPA did not properly seek comments or publicize the review process. She called for further re-evaluation of the insecticide in compliance with the law.
Spirotetramat, which inhibits cell reproduction in insects, targets such sucking pests as aphids, whiteflies, scales, mealybugs, psylla, phylloxera, thrips, and mites.
Up to now, its registered uses, according to the 74-page EPA document, included a variety of fruits and vegetables, as well as uses in greenhouses and nurseries. A few of them: citrus, grapes, cucumbers, brussel sprouts, cabbage, potatoes, onions, strawberries, stone fruits and livestock commodities.
The Xerces Society, an invertebrate conservation society based in Portland, Ore., and the Natural Resources Defense Council, an environmental organization in New York, filed the suit as a means to protect bees.
Pesticides--along with diseases, viruses, parasites, pests, malnutrition and the changing weather--have been linked to colony collapse disorder, a mysterious malady in which adult bees abandon the colony, leaving behind the queen, brood and food stores.
"Save the bees" is a hue-and-cry being heard about the world. And rightfully so.
Bees, our little agricultural workers, pollinate about one-third of the food we eat. In the United States, bees pollinate $15 billion worth of plants every year, according to the U.S. Department of Agriculture.
Newly emerged bee