Re: FLA: Introduced /Fusarium/ plan

Russ Bulluck (lrbulluc@unity.ncsu.edu)
Wed, 28 Jul 1999 08:43:34 -0400

The most important thing about Fusarium oxysporum is that it tends to be host
specific (thus the number of forma specialis, f sp). Further determining
pathogenicity of F. oxysporum is difficult because of the f sp. problem. I know
(and know of ) the researchers working on this project at APHIS in Maryland, and
they have been working on this for quite a few years. They also know the
importance of protecting the environment. Some of these researchers are pioneers
in the Biocontrol of plant diseases through the use of other fungi, Trichoderma
harzianum, and Gliocladium virens. I think that popular press has trivialized and
sensationalized the issue, as usual. . .Just my two cents. . .Russ

Misha wrote:

> Howdy, all--
>
> Thought this might interest you stupidity-watchers. Maybe they could
> introduce some cane toads, goats, cats, and what the heck anthrax and
> Ebola virus while they're at it.
>
> (Pardon my editorializing. And please note the next to the last
> sentence in the following story, which manages to palm off any
> previous biological mistakes on the mistakes themselves, rather than
> on the people who made them, and allow that to stand as evidence that
> it can't happen again. :^)
>
> The person who sent it to me indicated it was in the electronic
> edition of the /New York Times/ this morning.
>
> peace
> misha
>
> (who also opines that "Ag/Bio Con" is the perfect name for such a biz)
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> > Marijuana-Eating Fungus Seen as Potent
> > Weapon, but at What Cost?
> >
> >
> >
> > By RICK BRAGG
> >
> > IAMI -- For decades, the hard part for drug agents stalking
> > Florida's marijuana growers was finding their crop.
> >The growers
> > weave their plants among corn stalks and even tomato vines
> >to foil aerial
> > searches. In swamps, growers make berms out of muck and chicken
> > wire and plant their crop, leaving fat, black water
> >moccasins to stand
> > guard.
> >
> > Hidden in Florida's lush landscape, the camouflaged marijuana plants
> > often foiled the small army of officers, helicopters and
> >drug-sniffing dogs.
> >
> > Now, the new head of the state's Office of Drug Control
> >hopes to kill
> > Florida's lucrative marijuana business in the very ground
> >in which it
> > thrives, by someday dusting suspected areas with a marijuana-eating,
> > soil-borne fungus, Fusarium oxysporum. It is a plan that has some
> > politicians and Florida drug enforcement officials excited, and some
> > environmentalists very worried.
> >
> > The fungus, a bioherbicide engineered specifically to
> >attack plants like
> > marijuana, is otherwise harmless, said Ag/Bio Con, the Montana
> > company that developed it.
> >
> > "Is it safe, and does it work?" asked Jim McDonough, who
> >was hired by
> > Gov. Jeb Bush this year to head Florida's Office of Drug Control.
> >
> > "I've heard some of the top scientists in the country say,
> >'Yes.' " But
> > McDonough, who served as Director of Strategy for Barry R.
> > McCaffrey, the White House drug czar, said the fungus would not be
> > used here until it was tested in rigidly controlled
> >conditions at a Florida
> > site.
> >
> > "When you deal with science, you deal with the cost of advancing and
> > what is the cost of not advancing," said McDonough, who pointed out
> > that 47 percent of the marijuana seized in the United
> >States is taken here
> > -- and much of it is home-grown. Most years, drug agents
> >destroy more
> > than 100,000 plants, and one year, 1992, they destroyed more than
> > 240,000 plants.
> >
> > "With prudence and with care, make your choices," he said.
> >
> > McDonough said he has not yet presented the plan to Bush.
> >
> > But in Florida, a state that has seen its environment ravaged by
> > supposedly harmless plants that thrived so well in a damp,
> >hot climate
> > that they overwhelmed indigenous plants, some environmentalists say
> > introducing the fungus is risky, that it could mutate and
> >cause disease, not
> > only in wild plants but in crops as well.
> >
> > "I personally do not like the idea of messing with mother
> >nature," said Bill
> > Graves, senior biologist at the University of Florida
> >Research Center in
> > Homestead. "I believe that if this fungus is unleashed for
> >this kind of
> > problem, it's going to create its own problems. If it isn't executed
> > effectively, it's going to target and kill rare and
> >endangered plants."
> >
> > David Struhs, Secretary of the Florida Department of Environmental
> > Protection, spelled out the dangers in a letter to
> >McDonough dated April
> > 6, 1999.
> >
> > "Fusarium species," he wrote, "are capable of evolving rapidly.
> > Mutagenicity is by far the most disturbing factor in
> >attempting to use a
> > Fusarium species as a bioherbicide.
> >
> > "It is difficult, if not impossible," he wrote, "to
> >control the spread of
> > Fusarium species."
> >
> > The mutated fungi can cause disease in a large number of
> >crops, including
> > tomatoes, peppers, flowers, corn and vines, he wrote, and
> >are "normally
> > considered a threat to farmers as a pest, rather than as a
> >pesticide.
> > Fusarium species are more active in warm soils and can
> >stay resident in
> > the soil for years. Their longevity and enhanced activity
> >under Florida
> > conditions are of concern, as this could lead to an
> >increased risk of
> > mutagenicity."
> >
> > What that means, say environmentalists, is that it is hot
> >here much of the
> > time, and living things behave differently in Florida than
> >almost anywhere
> > else in this country.
> >
> > "In principle, I am very supportive of using biological
> >agents against
> > narcotic plants," said Raghavan Charudattan, professor of plant
> > pathology and weed science at the University of Florida.
> >"This needs to
> > be researched well or it could lead to great danger."
> >
> > State officials have agreed to quarantine testing of the
> >fungus -- at a
> > facility outside Gainesville usually used for, among other
> >things, studying
> > citrus canker, a catastrophic plant disease that has
> >ruined whole orchards
> > -- and for now any use of the fungus is probably years away.
> >
> > But McDonough has some powerful allies, including
> >Representative Bill
> > McCollum, a Republican from Longwood, Fla. McDonough is planning
> > to try to obtain part of a $23-million Congressional allocation for
> > research in eradicating plants like marijuana, and having
> >an ally like
> > McCollum, as well as some Republican fund-raisers who back the idea,
> > could be helpful.
> >
> > In Peru, angry farmers have recently accused the United
> >States of using a
> > soil fungus to destroy coca in the Upper Huallaga Valley,
> >saying that
> > fungus has spread to banana, yucca, tangerine and other food crops,
> > according to The Miami Herald.
> >
> > American officials, while acknowledging in June that they
> >had spent $14
> > million on research to develop such biological agents
> >against poppy, coca
> > and marijuana, denied the charges.
> >
> > In Florida, history has taught scientists to be cautious
> >of introducing any
> > foreign, living thing into the environment. While pythons
> >as long as pickup
> > trucks have occasionally been found under houses in South
> >Florida, most
> > of the problems have been with vegetable matter.
> >
> > Kudzu, a Chinese vine that has grown rampant in the South since its
> > introduction in the 1920's to thwart soil erosion, has
> >swallowed houses
> > and acres of roadside in Florida, as it grows a foot a
> >day. Melaleuca
> > trees, planted decades ago to help drain the Everglades because they
> > suck up so much water, have infested hundreds of thousands of acres.
> >
> > Jerry Brooks, assistant director of the state Department
> >of Environmental
> > Protection's Division of Water Resources, said the
> >difference between
> > those plants and the fungus is that the state has learned
> >to be careful.
> >
> > "Mistakes made in the past," Brooks said, "make sure proper
> > precautions are being taken."
> >
> > "They were not tested," he said of the infamous plants.
>
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--
Russ Bulluck
Ph.D. Candidate
Department of Plant Pathology
North Carolina State University
PO Box 7616
Raleigh, NC  27695-7616

http://www.cals.ncsu.edu/plantpath/Personnel/Students/webpage.htm

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The soil population is so complex that it manifestly cannot be dealt with as a whole with any detail by any one person, and at the same time it plays so important a part in the soil economy that it must be studied. --Sir E. John Russell The Micro-organisms of the Soil, 1923 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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