Plant Disease Creeps Into Midwest

A plant disease that could threaten oak trees has moved
from California to the Midwest. The GLRC’s Chris Lehman
has more:

Transcript

A plant disease that could threaten oak trees has moved
from California to the Midwest. The GLRC’s Chris
Lehman has more:


The disease was discovered in California in 1995 and has
mainly been confined to the Pacific Northwest. The
scientific name is Phytophthora ramorum. It
attacks some types of oak trees and shrubs.


Scientists say it could threaten large portions of eastern woodland.
Symptoms of the disease are hard to spot with the un-
trained eye, and some trees survive for years after
becoming infected.


The Indiana Department of Natural Resources says the
disease was discovered on a shrub that was shipped to a
hardware store from the state of Oregon.


Officials hope the early discovery of the disease means it won’t immediately
spread. But they say the incident is an example of how
easily deadly plant diseases can move from one part of the
country to another.


For the GLRC, I’m Chris Lehman.

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Beech Trees Battle Disease

A disease that’s destroying trees is spreading through parts of the Great Lakes region. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

A disease that’s destroying trees is spreading through parts of the Great Lakes Region. The Great Lakes Radio Consortium’s Lester Graham reports.


Beech bark disease has been damaging beech trees in eastern Canada and New England for a century. The disease has been creeping westward across the upper sections of U.S. since then. Last year Beech bark disease was discovered in the upper peninsula of Michigan. The disease is caused by two pests. First an insect called the wooly beech scale attacks the tree and open wounds. Then a fungus enters the bark, killing the trees. Often the beech trees are knocked over by high winds because of the damage done to them. Not all beech trees succumb to the disease. Scientists are now studying trees that appear resistant to beech bark disease, and they’re also looking for natural predators of the scale insect or the fungus that damages beeches. In the meantime, forest officials are cutting down beeches damaged by the disease. Before the trees fall down on someone unexpectedly.


For the Great Lakes Radio Consortium, this is Lester Graham.

Regional Winemakers Worry About Disease

Some winemakers are battling a disease called "black goo." It’s caused
by a fungus that leaves infected grape vines stunted and weak. As the
Great Lakes Radio Consortium’s Wendy Nelson reports, no one’s sure
where the disease is coming from, or where it might turn up:

Transcript

Some winemakers are battling a disease called “black goo.” It’s caused by a fungus that leaves infected grape vines stunted and weak. As teh Great Lakes Radio Consortium’s Wendy Nelson reports, no one’s sure where the disease is coming from, or where it might turn up:


Black goo has claimed an estimated nine-thousand acres of vines in California. That’s only about one percent of the state’s vineyards. But so far, there’s no cure; the only thing growers can do is rip up the vines and replant.


Ironically, some think the ever-growing popularity of California wines may be contributing to the problem.


“In other years, some of the weaker vines would have been thrown away.”


Wayne Wilcox is a professor of plant pathology with Cornell University.


“One of the prevailing theories is that this disease – the fungi that are causing it – are preying on some of these weaker vines.”


Wilcox says there have been a couple of isolated reports of black goo outside of California, including one case in New York. But he says Great Lakes winemakers shouldn’t panic. Instead, Wilcox advises them to examine vines carefully and reject any that look weak.


For the Great Lakes Radio Consortium, I’m Wendy Nelson.