So far, only extreme cold stops the hemlock woolly adelgid. But the University of Vermont’s Scott Costa may soon give forest managers and homeowners a tool to fight back.
Working with the U.S. Forest Service, the State of Vermont, and others, Costa, an entomologist in UVM’s Department of Plant and Soil Science, has been developing a novel method of putting an insect-killing fungus, lecanicillium muscarium, to work protecting hemlock trees.
The entire range of eastern hemlock and the less common Carolina hemlock, from southern Canada to Georgia, is currently at risk from the adelgid, a bug native to Asia that arrived in the United States in the 1920s and made its way to the East Coast in the 1950s. The stakes are high: hemlock provides habitat for dozens of mammals and birds. Arching over streams, it creates deep shade critical for the survival of trout and other fish. Some scientists think hemlock is a so-called keystone species, holding up a whole ecosystem.
Nobody thinks the adelgid pest can be eliminated. But Costa has had success with field trials on one-acre forest plots in Tennessee, using helicopters to drop the fungus — mixed with his proprietary blend of growth-enhancing ingredients — into the epicenter of the adelgid’s devastating attack. These trials reduced the growth rate of adelgid by fifty percent — “that’s the first time that’s been demonstrated with an insect-killing fungus,” Costa says — and it seems likely to give trees a fighting chance of recovery.
Over the last year, Costa has been testing the same technology on single trees in Vermont to see if ground-based spray applications will work, too. UVM Today dropped in on Costa in the field at Townshend State Park, north of Brattleboro, Vt., and in his laboratory at Jeffords Hall on campus. We wanted to see if his latest experiment would succeed.
Joshua Brown | EurekAlert!
Kakao in Monokultur verträgt Trockenheit besser als Kakao in Mischsystemen
18.09.2017 | Georg-August-Universität Göttingen
Ultrasound sensors make forage harvesters more reliable
28.08.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...
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21.09.2017 | Health and Medicine