Difficult, perhaps devestating for some areas, but maybe overall not as bad as it sounds?
"Almonds, apples, avocados, blueberries, cantaloupes, cherries, cranberries, cucumbers, sunflowers, watermelon and many other crops all rely on honey bees for pollination. The U.S. Department of Agriculture estimates that about one-third of the human diet is derived from insect-pollinated plants and that the honey bee is responsible for 80 percent of this pollination.
A 2000 Cornell University study concluded that the direct value of honey bee pollination to U.S. agriculture is more than $14.6 billion."
===========
Alternative Pollinators: Native Bees
Horticulture Technical Note
By Lane Greer
NCAT Agriculture Specialist
August 1999
Abstract
This publication discusses using solitary or native bees as pollinators. Some of the larger groups of bees are discussed, including alkali bees, leafcutter bees, alfalfa leafcutter bees, bumblebees, sweat bees, squash bees, digger bees, orchard mason bees, shaggy fuzzyfoot bees, and hornfaced bees. Information is also presented on how to attract and conserve populations of wild bees for pollination purposes. There is also a list of suppliers of native bees and bee equipment.
Introduction
There are more than 3500 species of solitary bees in North America. Also called pollen bees or native bees, these efficient pollinators often do the lion's share of pollinating crops. Pollen bees have a number of advantages over honeybees as pollinators (1). Many are active early in the spring, before honeybee colonies reach large size (1). Pollen bees tend to stay in a crop rather than fly between crops, providing more efficient pollination (1). Because they fly rapidly, pollen bees can pollinate more plants (1). Unlike honeybees, the males also pollinate the crop (1). Pollen bees are usually gentle, with a mild sting, and do not get disoriented in greenhouses (1).
The drastic decline in feral and domestic honeybees in the last few years, because of decimation by Varroa mites, has made it even more important to conserve and study wild bee populations. Dr. Hachiro Shimanuki, head of the USDA's Bee Research Laboratory in Beltsville, Maryland, has charted a 25 percent decline in managed honeybees in the last decade (2). Although the number of pollen bees has also declined, due to pesticide use and habitat destruction, pollen bees are unaffected by mites and Africanized bees, and many can be managed and used in commercial agriculture.
Often, growers don't realize the amount of pollination that is performed by native bees, and signs of inadequate pollination are often misinterpreted as weather problems or disease. Dr. Suzanne Batra of the USDA's Bee Research Lab in Beltsville, Maryland conducted a three-year study to discover the natural mix of bees in a West Virginia forest (3). She found that, of the 1700 bees trapped in the first year of the study, only 34 were honeybees. This means that pollen bees were performing almost all pollination.
Although pollen bees make small amounts of honey, it is not collectable, so the sole purpose of managing them is for pollination. According to Dr. Peter Kevan, "The economic value of pollination, seed set, and fruit formation greatly outweighs that suggested by more conventional indices, such as the value of honey and wax produced by honeybees" (4). In order for an insect to be used as a pollinator, however, it should be easily handled and readily available in large numbers (5).
....... more
ebeehoney.com |
