Researchers with USDA's Agricultural Research Service (ARS) are testing a fungal pathogen that could be used as a biocontrol, along with the release of non-stinging wasps that are the beetle's natural enemies. Wasps have been released in Michigan, Illinois, Indiana, Ohio, West Virginia and Maryland, and releases are planned in several other states.
John Vandenberg, an entomologist with the ARS Robert W. Holley Center for Agriculture and Health in Ithaca, N.Y., is evaluating Beauveria bassiana, a fungus that is the active ingredient in a commercially available insecticide. Researchers have found that the fungus helps to control emerald ash borer beetles when it is applied to infested trees before wasps are released.
Results, published in the journal Biological Control, show the fungus kills beetles and persists better on bark than on leaves. More recent work shows the fungus does not harm the wasps. ARS is the USDA's principal intramural scientific research agency, and the research supports USDA's commitment to agricultural sustainability.
The beetles were first detected in the United States near Detroit, Mich., in 2002 and have since wiped out huge swaths of ash trees in forests and tree-lined neighborhoods. Along with the ecological implications, ash trees are used to make furniture, tool handles, baseball bats, and other wood products.
In other work, Jian Duan, an entomologist at the ARS Beneficial Insects Introduction Research Unit in Newark, Del., is working with state and federal partners to determine how well the three wasp species being released, Oobius agrili, Tetrastichus planipennisi, and Spathius agrili, are surviving the winter in different Northeastern habitats and whether any one of the wasps is more effective than the others.
Duan also recently published a preliminary assessment focused on whether the wasps were able to become established in three stands of natural forests in Michigan. His findings, published in the journal Environmental Entomology, showed that at least one of the wasps (T. planipennisi) had become established in three release sites in Michigan, and that T. planipennisi was the most abundant species of parasitoid wasps attacking emerald ash beetle larvae a year after release.
Read more about this research in the April 2011 issue of Agricultural Research magazine. http://www.ars.usda.gov/is/AR/archive/apr11/pest0411.htm
USDA is an equal opportunity provider, employer and lender. To file a complaint of discrimination, write: USDA, Director, Office of Civil Rights, 1400 Independence Ave., S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice), or (202) 720-6382 (TDD).
Dennis O'Brien | EurekAlert!
Microjet generator for highly viscous fluids
13.02.2018 | Tokyo University of Agriculture and Technology
Sweet route to greater yields
08.02.2018 | Rothamsted Research
A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.
In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...
A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.
By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
23.02.2018 | Physics and Astronomy
23.02.2018 | Health and Medicine
23.02.2018 | Physics and Astronomy