Friday, October 06, 2006

Wild Bees Make Honeybees Better Pollinators

Up to a third of our food supply depends on pollination by domesticated honeybees, but the insects are up to five times more efficient when wild bees buzz the same fields, according to a study published Aug. 28 in the journal Proceedings of the National Academy of Sciences of the USA.

"As honeybees become more scarce, it becomes more important to have better pollinators," said Sarah Greenleaf, a postdoctoral researcher at UC Davis and first author on the study.

As a graduate student at Princeton University, Greenleaf carried out a two-year study of honeybees used to pollinate sunflower crops on farms in Yolo County, Calif., near UC Davis.
Compared to honeybees, wild bees did not contribute much directly to crop pollination. But on farms where wild bees were abundant, honeybees were much more effective in pollinating flowers and generating seeds, Greenleaf found.

There appear to be two reasons for that. Male wild bees, probably looking for mates, will latch onto worker honeybees, which are sterile females, causing them to move from one flower to another. Secondly, female wild bees appear to "dive bomb" honeybees, forcing them to move. Frequent movement between flowers spreads pollen around more effectively.

Greenleaf and her co-author Claire Kremen, now a professor at UC Berkeley, calculated that wild bees contributed about $10 million of value to the $26-million sunflower industry alone.
All the fields in the study were conventionally farmed, but varied in their proximity to natural habitat, Greenleaf said.

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AGRI-INFO/OCTOBER 6, 2006



TITLE: WILD BEES MAKE HONEYBEES BETTER POLLINATORS


ALAM BA NINYO NA ANG MGA WILD BEES AY MALAKI ANG NAITUTULONG SA HONEYBEES PARA MAGING MAS EPEKTIBONG POLLINATORS?

ITO ANG LUMABAS SA PAG-AARAL NA GINAWA NG MGA EKSPERTO AT NALATHALA ANG KANILANG RESULTA NG PANANALIKSIK SA JOURNAL PROCEEDINGS NG NATIONAL ACADEMY OF SCIENCES SA ESTADOS UNIDOS.

ANG GANITONG HAKBANG AY NAGLALAYONG MATUGUNAN ANG HALOS NAWAWALA NA NGAYONG HONEYBEES NA NAPAPAKINABANGAN NATIN SA POLLINATION NG MGA HALAMAN NA NAGSISILBING PAGKAIN NATIN.

AYON KAY SARAH GREENLEAF, POSTDOCTORAL RESEARCHER NG UC DAVIS, BATAY SA DALAWANG TAON NIYANG PAG-AARAL SA HONEYBEES, MAS KAPAKI-PAKINABANG TO SA POLLINATION NG MGA HALAMAN PARTIKULAR NG SUNFLOWER KUNG IHAHAMBING SA WILD BEES.

NGUNIT, NATUKLASAN NI GREENLEAF NA SA MGA LUGAR NA SAGANA SA WILD BEES AY MAS EPEKTIBO O KAPAKI-PAKINABANG ANG HONEYBEES SA POLLINATION NG MGA BULAKLAK AT GENERATON NG MGA SEEDS NG MGA HALAMAN.

DALAWA ANG NAKIKITANG DAHILAN: ANG LALAKING WILD BEES AY NAKIKIPAG-NIIG SA MGA STERILE HONEYBEES NA SIYANG DAHILAN PARA MAGING MASIPAG ITO AT PALIPAT-LIPAT NG BULAKLAK, AT PANGALAWA ANG BABAENG WILD BEES AY PALAGING NAGBABANTA SA MGA BABAENG HONEYBEES PARA MAPWERSA SILANG MAGPALIPAT-LIPAT NG LUGAR.

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