2011年7月28日星期四

Wasps save trees?

A non-stinging wasp that likes to build its nests in baseball diamonds is helping Maine entomologists detect an insect that has decimated millions of ash trees in the Midwest.

The cerceris fumipennis wasp is the best weapon researchers have to determine whether the emerald ash borer has made its way to Maine.

Colleen Teerling, an entomologist with the Maine Forest Service, taught volunteers Wednesday how to recognize the wasp, which lives in several colonies in the baseball diamonds at Freeport Middle School. If the emerald ash borer's presence in Maine is detected early, it is much easier to control.

"It has the potential of wiping out every species of ash on the continent,I have never solved a Rubik's magic cube ." Teerling said.As many processors back away from offshore merchant account ,

Since the emerald ash borer was first discovered in Michigan in 2002, it has spread to 20 states and Canada. The beetle is believed to have entered the United States in cargo ships and airplanes from its native Asia.

It has not yet spread to Maine but is getting close. It has been detected south of Montreal, about 20 miles from the Vermont border and in the Catskill Mountains in New York.

Ash trees make up only 4 percent of Maine's trees but are important street species, filling in the niche created when American elm trees were wiped out by a fungus believed to have been imported from Asia.

Maine was one of the first states to set up a bio-surveillance program with Cerceris fumipennis three years ago.the oil paintings for sale by special invited artist for 2011, Today, about 20 volunteers have adopted some of the 60 known colonies of the wasps in Maine.

Researchers are looking for more volunteers to find other wasp colonies and monitor them for the emerald ash borer.

The project has been funded by about $25,000 from the U.S. Forest Service. The Maine Forest Service is working with GrowSmart Maine,Our Ventilation system was down for about an hour and a half, a community revitalization group, to widen its network of volunteers, and with Brunswick to develop a response plan for the emerald ash borer.

Scientists expect it will arrive in the state by 2015.

Scientists believe the emerald ash borer travels on firewood imported from other infected states. The adult emerald ash borer feeds on ash foliage but causes little damage. But the larvae feed on the inner bark of ash trees, disrupting the tree's ability to move water and nutrients.

Cerceris fumipennis builds its nest in hard-packed sand with little or no vegetation, which makes baseball diamonds an ideal site for a colony.

The female wasp builds the nest with an opening about the size of a pencil eraser.There is a great range of the items available in the retail stores of this brand.zentai She then hunts metallic-colored buprestid beetles, including the emerald ash borer. She places three to four beetles in the five to 10 chambers in her nest before laying an egg in each of the chambers and sealing them.

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