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A "time bomb" for world's wheat supply.

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ronito

Member
http://www.latimes.com/news/nationworld/nation/la-sci-wheat-rust14-2009jun14,0,365785,full.story

The spores arrived from Kenya on dried, infected leaves ensconced in layers of envelopes.

Working inside a bio-secure greenhouse outfitted with motion detectors and surveillance cameras, government scientists at the Cereal Disease Laboratory in St. Paul, Minn., suspended the fungal spores in a light mineral oil and sprayed them onto thousands of healthy wheat plants. After two weeks, the stalks were covered with deadly reddish blisters characteristic of the scourge known as Ug99.


Nearly all the plants were goners.

Crop scientists fear the Ug99 fungus could wipe out more than 80% of worldwide wheat crops as it spreads from eastern Africa. It has already jumped the Red Sea and traveled as far as Iran. Experts say it is poised to enter the breadbasket of northern India and Pakistan, and the wind will inevitably carry it to Russia, China and even North America -- if it doesn't hitch a ride with people first.

"It's a time bomb," said Jim Peterson, a professor of wheat breeding and genetics at Oregon State University in Corvallis. "It moves in the air, it can move in clothing on an airplane. We know it's going to be here. It's a matter of how long it's going to take."

Though most Americans have never heard of it, Ug99 -- a type of fungus called stem rust because it produces reddish-brown flakes on plant stalks -- is the No. 1 threat to the world's most widely grown crop.

The International Maize and Wheat Improvement Center in Mexico estimates that 19% of the world's wheat, which provides food for 1 billion people in Asia and Africa, is in imminent danger. American plant breeders say $10 billion worth of wheat would be destroyed if the fungus suddenly made its way to U.S. fields.

Fear that the fungus will cause widespread damage has caused short-term price spikes on world wheat markets. Famine has been averted thus far, but experts say it's only a matter of time.

"A significant humanitarian crisis is inevitable," said Rick Ward, the coordinator of the Durable Rust Resistance in Wheat project at Cornell University in Ithaca, N.Y.

The solution is to develop new wheat varieties that are immune to Ug99. That's much easier said than done.

After several years of feverish work, scientists have identified a mere half-dozen genes that are immediately useful for protecting wheat from Ug99. Incorporating them into crops using conventional breeding techniques is a nine- to 12-year process that has only just begun. And that process will have to be repeated for each of the thousands of wheat varieties that is specially adapted to a particular region and climate.

"All the seed needs to change in the next few years," said Ronnie Coffman, a plant breeder who heads the Durable Rust Resistance in Wheat project. "It's really an enormous undertaking."

Ancient adversary

Farmers have been battling stem rust for as long as they have grown wheat. The fungus' ancestors infected wild grasses for millions of years before people began cultivating them for food, said Jorge Dubcovsky, professor of genetics and plant breeding at UC Davis.

"The pathogen keeps mutating and evolving," he said. "It's one of our biblical pests. This is not a small enemy."

When a spore lands on a green wheat plant, it forms a pustule that invades the outer layers of the stalk. The pustule hijacks the plant's water and nutrients and diverts them to produce new rust spores instead of grain. Within two weeks of an initial attack, there can be millions of pustules in a 2.5-acre patch of land.

Wheat plants that can recognize a specific chemical produced by stem rust can mount a defense against the fungus. But the rust is able to mutate, evade the plant's immune system and resume its spread.

Stem rust destroyed more than 20% of U.S. wheat crops several times between 1917 and 1935, and losses reached nearly 9% twice in the 1950s. The last major outbreak, in 1962, destroyed 5.2% of the U.S. crop, according to Peterson, who chairs the National Wheat Improvement Committee.

The fungus was kept at bay for years by breeders who slowly and methodically incorporated different combinations of six major stem rust resistance genes into various varieties of wheat. The breeders thought it unlikely that the rust could overcome clusters of those genes at the same time.

After several outbreak-free decades, it seemed that stem rust had been defeated for good. Scientists switched to other topics, and the hunt for new resistance genes practically slowed to a crawl.

A new strain of stem rust was identified on a wheat farm in Uganda in 1999.

"It didn't draw a lot of attention, frankly," said Marty Carson, research leader at the Cereal Disease Laboratory, part of the U.S. Department of Agriculture. "There's very little wheat grown in Uganda."

East Africa is a natural hot spot for stem rust. Weather conditions allow farmers to grow wheat year-round, so rust spores can always find a susceptible host. Some of the wheat is grown as high as 7,000 feet above sea level, where intense solar radiation helps the fungus mutate.

The highlands are also home to barberry bushes, the only plant on which stem rust is known to reproduce through sexual recombination. That genetic shuffling provides a golden opportunity for the fungus to evolve into a deadly strain.

Within a few years, Ug99 -- named for the country and year it was identified -- had devastated farms in neighboring Kenya, where much of the wheat is grown on large-scale farms that have so far been able to absorb the blow. Then it moved north to Ethiopia, Sudan and Yemen, putting more small farms at risk. Those that can afford it are trying to make do with fungicides, but that's too cumbersome and expensive to be a long-term solution, Ward said.

To make matters worse, the fungus is becoming more virulent as it spreads. Scientists discovered a Ug99 variant in 2006 that can defeat Sr24, a resistance gene that protects Great Plains wheat.

Last year, another variant was found with immunity to Sr36, a gene that safeguards Eastern wheat.

Should those variants make their way to U.S. fields any time soon, scientists would be hard-pressed to protect American wheat crops.

A laborious task

Now the pressure is on to develop new wheat varieties that are impervious to Ug99. Hundreds of varieties will need to be upgraded in the U.S. alone.

"You can't just breed it into one or two major varieties and expect to solve the problem," Peterson said. "You have to reinvent this wheel at almost a local level."

The first step is to identify Ug99 resistance genes by finding wheat plants that can withstand the deadly fungus.

Roughly 16,000 wheat varieties and other plants have been tested in the cereal disease lab over the last four years. The tests were conducted between Dec. 1 and the end of February, when the Minnesota weather is so frigid that escaping spores would quickly perish, Carson said.

These and similar efforts at a research station in Kenya have turned up only a handful of promising resistance genes, which crop breeders such as Brett Carver at Oklahoma State University in Stillwater are trying to import into vulnerable strains of wheat.

Each year, Carver crosses hundreds of plants in a greenhouse to produce as many as 50,000 candidate strains. Over the next four years, those are winnowed down, and the most promising 2,000 are planted in the field.

Only the hardiest strains are replanted each year, until the 12-year process results in a single new variety with dozens of valuable traits, such as the ability to withstand drought and make fluffy bread.

The oldest of the plants Carver bred for Ug99 resistance are only 3 years old, but one of the strains has been planted in the field already in case the fungus hitches a quick ride to the U.S. on an airplane or in a shipping container.

"In the absence of stem rust, it would not be the highest-yielding wheat," he said. "In the presence of stem rust, it would be the only thing that would survive."
ZOMG! START HOARDING NOW!
 

harSon

Banned
I'm pretty much oblivious to stories like this, I'm still waiting to feel the effects of Bee extincting :(
 

Manics

Banned
harSon said:
I'm pretty much oblivious to stories like this, I'm still waiting to feel the effects of Bee extincting :(


I thought the exact same thing when I saw this story. When I saw some bees trying to make a hive in my patio umbrella this weekend I wanted to kick my buddy in the head for telling me all the bees were dying a few years ago.
 

DrEvil

not a medical professional
It was the same thing last year when the media was all like OMGZ YOUR BAANANAS ARE GONNA BE GONE CUZ OF FUNGAI NEXT YEAR.


We still have our goddamn bananas.
 

Ether_Snake

安安安安安安安安安安安安安安安
Quick, call Monsanto to the rescue! Only they could replace all wheat seeds in the world with genetically modified and patented Ug99-resistant seeds!
 

Raistlin

Post Count: 9999
This sounds serious ...




Ferrio said:
Sheep for wheat? Anyone sheep for wheat? Come on... i know one of you has some wheat you can spare.

... so ... two sheep and a brick for a wheat. Final offer.
 

Kinitari

Black Canada Mafia
Someone told me once that a lot of the times it's a reporter asking a scientist "Hmm, whats the absolute WORST case scenario, even if its a .0001% chance?" and the scientist will say "Well, all the beavers in Canada could become extinct. There would be massive floods in some places and droughts in others, possibly. Oh and giant space giraffes will rape your face with their 7 feet long barbed penises". But they usually cut out the last part during editing.
 
Solaros said:
Is this one Monsanto's fault?

Not the fungi, but the homogenous supply of wheat seeds.
Monsanto tried for a long time to get hybrid wheat into mass market that was more resistant to this kind of thing. Honestly they still be trying I haven't kept up in some time. IT's the same kind of thing Ciba was doing with tobacco years ago (kind of)
 

Spire

Subconscious Brolonging
It's okay guys, I killed ug99 in a game of TF2 last night. Bitch moved his face into the path of my grenade.
 
Kinitari said:
Someone told me once that a lot of the times it's a reporter asking a scientist "Hmm, whats the absolute WORST case scenario, even if its a .0001% chance?" and the scientist will say "Well, all the beavers in Canada could become extinct. There would be massive floods in some places and droughts in others, possibly. Oh and giant space giraffes will rape your face with their 7 feet long barbed penises". But they usually cut out the last part during editing.
Yep, pretty much. Conversely, when it's new technology, the journalist asks what the absolute BEST case scenario could be... and then they fudge the numbers.
 
Ferrio said:
Sheep for wheat? Anyone sheep for wheat? Come on... i know one of you has some wheat you can spare.
:lol They need to release a modern version of that, call it The Settlers of the Apocalypse. The best board game ever even better.
 
B.K. said:
Doesn't anything good ever come out of Africa?

Yes.

I'm more on the conspiracy theory tip, as soon as I read "the solution is to develop new wheat varieties that are immune to Ug99" I realized the massive profit that someone is looking at already.

The US already sent millions of tons of genetically modified corn to Africa in the form of food "aid" that contaminated the pure stocks and made it impossible for African farmers to export non-GMO crops to Europe and drastically cut the supply of non-GMO corn across the world.
 

Dice

Pokémon Parentage Conspiracy Theorist
We already have a time bomb, it's called global warming. Rainfall patterns will shift and our deciduous midwest will become desert. Boreal areas in Canada will be the new deciduous zones but the land won't be ready for proper farming and global food production will drop dramatically. Of course, it's debatable whether this will be a problem or not, as it will occur after the coastal flooding causes a mass immigration inland, which will completely overwhelm the already strained freshwater sources and possibly cause many to die of thirst amidst warring factions.
 

teh_pwn

"Saturated fat causes heart disease as much as Brawndo is what plants crave."
This sort of stuff is going to be far more likely because we have a lot less diversity in crops because farms are buying up the highest performing kind due to trail/error or genetic engineering. Good thing we have those seed banks that are storing diverse types of wheat and other crops.
 

Ether_Snake

安安安安安安安安安安安安安安安
teh_pwn said:
This sort of stuff is going to be far more likely because we have a lot less diversity in crops because farms are buying up the highest performing kind due to trail/error or genetic engineering. Good thing we have those seed banks that are storing diverse types of wheat and other crops.

Yeah so we can plant them after everyone's dead, except some rich people.
 

teh_pwn

"Saturated fat causes heart disease as much as Brawndo is what plants crave."
Ether_Snake said:
Yeah so we can plant them after everyone's dead, except some rich people.

Huh? I'm not promoting organic food.

Having less genetic diversity is a terrible for crops, because if a fungus or disease affects the crop in one nation, it's likely to kill off all the entire world's crop.

It has nothing to do with rich people. If we fuck up and an entire crop dies off due to being inbred, we can go to the seed banks and start over. It's not elitism, it's common sense.
 

Ether_Snake

安安安安安安安安安安安安安安安
No I just meant that stocking up seeds is great and all, it just shows we're heading for a disaster that should never come, and that it's going to affect first and foremost poor people.
 

teh_pwn

"Saturated fat causes heart disease as much as Brawndo is what plants crave."
Ether_Snake said:
No I just meant that stocking up seeds is great and all, it just shows we're heading for a disaster that should never come, and that it's going to affect first and foremost poor people.

True. If there aren't already regulations on genetic diversity of crops, there should be. And probably the best thing we can do for poor nations is give them dirt cheap loans like the Bill & Melinda Gates fund. It's not just food they're lacking, it's basic infrastructure to keep food and water from spoiling.
 
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