Tree-killing fungus officially named by scientists

Jun 30, 2008

The USDA Forest Service Southern Research Station (SRS) today announced that an SRS scientist and other researchers have officially named the fungus responsible for killing redbay and other trees in the coastal plains of northeastern Florida, Georgia, and South Carolina.

Lead author and Iowa State University Plant Pathologist Tom Harrington, co-author and SRS Plant Pathologist Stephen Fraedrich, and Azerbaijan National Academy of Sciences Researcher D.N. Aghayeva unveiled the name, Raffaelea lauricola, in an article published in the April-June 2008 issue of Mycotaxon, the international journal of fungal taxonomy and nomenclature.

"Until now, the fungus was known as 'the laurel wilt pathogen' because of the devastating disease it causes in redbay trees and other laurel species like sassafras and avocado trees in the Southeast," said Fraedrich, based in Athens, GA. "Now arborists, foresters, researchers, and regulatory officials have a formal, scientific name and description of the fungus, as well as a detailed explanation of how the pathogen compares to similar fungi."

Raffaelea lauricola is one of many species of fungi carried by ambrosia beetles, a group of highly specialized wood-boring insects that feed on symbiotic fungi, which they carry from tree to tree in specialized sacs. The beetles feed on their own special ambrosia fungi, much as the Greek gods were believed to exist on their "ambrosia." R. lauricola is the principle ambrosia fungus of an invasive species from Asia, the redbay ambrosia beetle. R. lauricola is the only known tree pathogen among the ambrosia fungi and differs from other Raffaelea species in its DNA sequence and spore sizes. The fungus also grows faster than similar fungi.

Ambrosia beetles introduce the fungus into redbay or other laurel tree species by burrowing into the trees and laying eggs. The fungus serves as a food source for beetle larvae. The pathogen moves through a tree's vessels causing a vascular wilt disease similar to Dutch elm disease.

In an April 3 press release, SRS announced the first description of the fungus and its association with the redbay ambrosia beetle and laurel wilt. The press release, posted online at www.srs.fs.fed.us/news/153>, provides more information about the fungus and the threat it poses to the laurel family.

Source: USDA Forest Service

Explore further: Insect mating behavior has lessons for drones

Related Stories

Drones and dogs deployed in battle to save the guacamole

Apr 28, 2015

With the killers hiding in the trees, heat-sensing drones are launched into the air. When their whereabouts are narrowed, the dogs are sent in. When it comes to protecting the world's supply of guacamole, ...

Canines, drones battle deadly avocado fungus

Mar 17, 2015

In just a few weeks, redbay ambrosia beetles will be on the move in Florida, a major concern for the state's multimillion dollar avocado industry. Florida International University (FIU) researchers believe ...

Invaders could devastate Florida avocado industry

Sep 21, 2010

Florida's lucrative avocado industry could face a serious blow from a duo of deadly new invaders. Together, the invasive fungus called "laurel wilt disease" and the redbay ambrosia beetle, which carries laurel wilt, represent ...

Recommended for you

Insect mating behavior has lessons for drones

15 hours ago

Male moths locate females by navigating along the latter's pheromone (odor) plume, often flying hundreds of meters to do so. Two strategies are involved to accomplish this: males must find the outer envelope ...

Bacterial tenants in fungal quarters

May 29, 2015

Ludwig Maximilian University of Munich researchers have sequenced the genome of a bacterial symbiont hosted by a mycorrhizal fungus. Analysis of the symbiont's genetic endowment reveals previously unknown ...

Natural enzyme examined as antibiotics alternative

May 29, 2015

In 1921, Alexander Fleming discovered the antimicrobial powers of the enzyme lysozyme after observing diminished bacterial growth in a Petri dish where a drop from his runny nose had fallen. The famed Scottish ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.