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Cyanide-Producing GM Grass Linked To Texas Cattle Deaths

Peristaltic writes "Scientists at the U.S. Department of Agriculture are trying to determine if an unexpected mutation in a popular GM grass, Tifton 85, is responsible for the sudden deaths of a small herd of cattle in Elgin, Texas three weeks ago. The grass has been used for grazing since 1992 without incident, however after a severe drought last year in Texas, the grass started producing cyanide in sufficient quantities to kill a small herd of cattle in Elgin, Texas. Testing has found the cyanide-producing grass in nearby fields as well." Update: 06/23 22:59 GMT by T : Reader Jon Cousins writes with a correction that means the headline above is inaccurate for including "GM." Tifton 85, he writes, is "absolutely not genetically modified. It's a conventionally bred hybrid."

42 of 305 comments (clear)

  1. Holy f*** by Anonymous Coward · · Score: 3, Interesting

    This is scary movie nightmare stuff come true!!!

    Grass that kills!!!

    1. Re:Holy f*** by haruchai · · Score: 4, Funny

      Ever seen Reefer Madness (1936)?

      --
      Pain is merely failure leaving the body
    2. Re:Holy f*** by nitehawk214 · · Score: 4, Funny

      This is amazing. I mean this is like something from The Onion. Except its real.

      Fortunately, onions have sulfur not cyanide.

      --
      I'm a good cook. I'm a fantastic eater. - Steven Brust
    3. Re:Holy f*** by Anonymous Coward · · Score: 5, Informative

      Why, cyanide production is common in lots of plants. Cattle sometimes die from eating too many cherry tree leaves. I don't understand the whole problem. Put plants under stress and they will produce more secondary metabolites for a multitude of reasons, including herbivore protection.

  2. Dear Mr Abel by drewsup · · Score: 5, Funny

    How dare your heard of cattle defame the good name of our company by having the nerve to DIE after eating our product. You sir, will be hearing from our attorneys.

    Sincerely,
    The Monsanto Group

    1. Re:Dear Mr Abel by LighterShadeOfBlack · · Score: 3, Funny

      I didn't realise FunnyJunk was in the GM business.

      --
      Spelling mistakes, grammatical errors, and stupid comments are intentional.
    2. Re:Dear Mr Abel by tomhath · · Score: 3, Informative

      /s/The Monsanto Group/University of Georgia/

      University of Georgia at Tifton and USDA, Monsanto is not involved at all.

    3. Re:Dear Mr Abel by khipu · · Score: 4, Informative

      You'd be amazed by all the completely natural plants that cattle will eat and that will kill them.

    4. Re:Dear Mr Abel by LordLimecat · · Score: 5, Informative

      A) Tifton85 isnt a Monsanto product
      B) Tifton85 isnt a GM product-- its a hybrid
      C) Some plants actually do produce cyanide, and they dont have to be GM to do so.

  3. Except it isn't GM grass. by mc6809e · · Score: 5, Informative

    Tifton 85 is actually a hybrid of African Bermuda grass and Tifton 68, a different hybrid produced in Tifton, Texas.

    It's not a GM grass.

    1. Re:Except it isn't GM grass. by cervesaebraciator · · Score: 4, Informative
      For those who're interested, here's a reference from the Texas Ag Extension Service. Finding more info on the matter is proving difficult (by which I mean it's taking more than five minutes) but here's a relevant quote:

      Tifton 85 is a hybrid bermudagrass that was jointly developed and officially released in 1992 by the USDAARS and the University of Georgia Coastal Plain Experiment Station in Tifton, Georgia. It is a cross between a selection from South Africa (PI 290884) and Tifton 68.

  4. BS by Anonymous Coward · · Score: 5, Informative

    You've got to be kidding: this report needs to be retracted as it is completely wrong. Tifton 85 is a conventionally bred grass.

    It's incredibly irresponsible to print something this inflammatory and wrong. You've now aerated people all over the world with this misunderstanding, and it will continue to be flogged forever with this incorrect information.

    Further, people who hear about this won't know what the real issue is and it could cause more cow deaths.

    Fix or retract this article immediately.

    Pull the story. Get your facts straight. This farmer needs education from a local co-op extention. Any native or hybrid (NOT GM) grass can create this condition! Those that care for truth and real data go here and learn: http://www.uwex.edu/ces/forage/pubs/sorghum.htm

    1. Re:BS by yndrd1984 · · Score: 4, Insightful

      --Tifton 85 is a conventionally bred grass.

      -Monsanto's team of hired spin doctors are working some overtime this weekend.

      How is correcting a major factual mistake in a story "spinning" anything?

    2. Re:BS by rohan972 · · Score: 5, Informative

      Maybe I'm being alarmist, but to me, it's better safe than sorry - sorry being a desert planet.

      You are being alarmist and it is not better to take drastic action unnecessarily than to know what you are doing. You are not going to get a desert planet from this. They are testing to see if it's a mutation because the weather events were not the ones they would have expected to produce cyanide. Production of cyanide by grasses is known and understood, this just happened unexpectedly and in combination with poor animal husbandry.

      It's not the only pasture crop that can kill cows if you put them in hungry to fresh grass, either. Even lucerne and other legumes can kill cows by releasing gas and foam in the stomach. I hope you don't think we should kill all legumes just in case.

    3. Re:BS by westlake · · Score: 4, Informative

      Pull the story. Get your facts straight. This farmer needs education from a local co-op extention.

      Cyanide poisoning in veterinary medicine:

      Cyanides are found in plants, fumigants, soil sterilizers, fertilizers, and rodenticides (eg, calcium cyanomide). Toxicity can result from improper or malicious use, but in the case of livestock, the most frequent cause is ingestion of plants that contain cyanogenic glycosides. These include Triglochin maritima (arrow grass), Hoecus lunatus (velvet grass), Sorghum spp (Johnson grass, Sudan grass, common sorghum), Prunus spp (apricot, peach, chokecherry, pincherry, wild black cherry), Sambucus canadensis (elderberry), Pyrus malus (apple), Zea mays (corn), and Linum spp (flax). The seeds (pits) of several plants such as the peach have been the source of cyanogenic glycosides in many cases. Eucalyptus spp , kept as ornamental houseplants, have been implicated in deaths of small animals.

      The cyanogenic glycosides in plants yield free hydrocyanic acid (HCN), otherwise known as prussic acid, when hydrolyzed by Î-glycosidase or when other plant cell structure is disrupted or damaged, eg, by freezing, chopping, or chewing. Microbial action in the rumen can further release free cyanide.

      Apple and other fruit trees contain prussic acid glycosides in leaves and seeds but little or none in the fleshy part of the fruits. In Sorghum spp forage grasses, leaves usually produce 2-25 times more HCN than do stems; seeds contain none. New shoots from young, rapidly growing plants often contain high concentrations of prussic acid glycosides.
      The cyanogenic glycoside potential is slow to decrease in drought-stricken plants containing mostly leaves. Grazing stunted plants during drought is the most common cause of poisoning of livestock by plants that produce prussic acid.

      Frozen plants may release high concentrations of prussic acid for several days. After wilting, release of prussic acid from plant tissues declines. Dead plants have less free prussic acid. When plant tops have been frosted, new shoots may regrow at the base; these can be dangerous because of glycoside content and because livestock selectively graze them.

      Ruminants are more susceptible than monogastric animals, and cattle slightly more so than sheep. Hereford cattle have been reported to be less susceptible than other breeds.

      Cyanide Poisoning: Introduction

      A history of cyanide poisoning generally, and a good read: Cyanide Poisoning

      Some common cyanogenic edible plants reported to cause cyanide poisoning include cassava, sorghum, sweet potatoes, yams, maize, millet, bamboo, sugarcane, peas, lima beans, soybeans, almond kernels, lemons, limes, apples, pears, peach, chokecherries, apricots, prunes, and plums. Cassava (manioc) and sorghum are staple foods for hundreds of millions of people in many tropical countries and are blamed in part for the high incidence of central and peripheral neuropathies in those areas.

      Since the time of ancient Egypt, plants containing cyanide derivatives, such as bitter almonds, cherry laurel leaves, peach pits, and cassava, have been used as lethal poisons. Peach pits used in judicial executions by the ancient Egyptians are on display in the Louvre Museum, Paris, and an Egyptian papyrus refers to the "penalty of the peach."

  5. Looks like crap from CBS by mynamestolen · · Score: 5, Informative

    A different report says this can happen in any type of grass. http://www.uwex.edu/ces/forage/pubs/sorghum.htm Young plants, including roots, and leaves of older plants contain a compound called dhurrin which can break down to release a substance called prussic acid or hydrogen cyanide (HCN). The recommendation is not to graze or cut for green chop until the plant is 18 to 20 inches tall.

    --
    work in progress
  6. This proves science is bad by flibbidyfloo · · Score: 3, Insightful

    Something deadly like this could never naturally evolve in plants! This must be the work of unnatural, man-driven processes! Stop all science now! Anthropocentrism at its finest.

  7. yeah, except for the true part by daninaustin · · Score: 5, Informative
    1. Re:yeah, except for the true part by Peristaltic · · Score: 3, Funny

      Damn. I was just pulling my pitchfork and torch out of the shed. Thought it was interesting; should have done more research.

    2. Re:yeah, except for the true part by khallow · · Score: 5, Informative

      just with the old hybridization-method they managed to create something that in field conditions produced enough cyanide to kill a cow.

      Cyanide poisoning is apparently a potential problem with any variety of grass, not just the hybrids.

    3. Re:yeah, except for the true part by ChromeAeonium · · Score: 4, Insightful

      Damn. I was just pulling my pitchfork and torch out of the shed.

      That right there sums up the problem with the GMO debate (well, one of them). Caring about the process, not the product. You can bet your ass that none of the anti-GMO groups out there are going to see this and other problems that have arisen from breeding (like the Lenape potato and high psoralens celery) are going to take this story and call for more stringent research of conventionally bred crops where heaven only known how many genetic changes may be happening. No one is going to say that breeding is unpredictable with dangerous results,or that is should be labeled, or that it should be banned until the precautionary principle proves a negative, or anything else people say about GMOs, but if this really were the product of biotechnology, you know damned well that is exactly what they, and many others, would be saying.

    4. Re:yeah, except for the true part by sjames · · Score: 3, Insightful

      Actually, it can and has produced roundup resistant plants, both through deliberate breeding programs and through basic natural selection in the fields.

      GM can do things that wouldn't happen in nature and it can be a problem. That just isn't an example of it.

    5. Re:yeah, except for the true part by ChromeAeonium · · Score: 4, Interesting

      There are actually some people who oppose hybrids already. I've encountered some real extreme heirloom crop zealots who believe that hybrids are generally bad things. Funny enough, people once said of hybrids, unknowingly foreshadowing what would later be said of GMOs, that they 'did violence to the plant' and they would 'befoul the soil'. Of course, we know know that hybridization ranks right up there with vaccination in terms of life saving technologies, and I have no idea how anyone could oppose something that the world could not get by without. Well, without being ignorant anyway, which no doubt they are.

      Fun fact: once there were people who opposed grafting, which is now used for pretty much every fruit tree. Johnny Appleseed was actually one of the, who believed that grafting was against the will of God, or some nonsense like that. He was something of a religious nut. Ironically because the trees he spread were seed grown and not grafted, they were only good for making applejack (well, I guess you could make other things out of them too, but take a wild guess as to what most people did with them back then). I guess grafting was ungodly but getting hammered on that stuff wasn't.

    6. Re:yeah, except for the true part by X0563511 · · Score: 4, Insightful

      I'd say GM is less likely to cause such things. Why?

      Well, when you hybridize you're "patching in" shitloads of other genes in an attempt to get the trait you want. GM is much more targeted, therefore much less chances of something you didn't want coming over.

      Of course, in both cases you'll still have the problems that might come up because of a lack of understanding in the trait you are after. If a gene that makes wheat grow faster makes it build up toxins, it doesn't really matter how you got the trait in there, because it's the trait itself that is at fault!

      --
      For large sets, this will be our guide even unto death, for the LORD will work for each type of data it is applied to...
    7. Re:yeah, except for the true part by Soralin · · Score: 3, Insightful

      OK, You tell me the procedure for mating a cucumber with a salmon.

      http://en.wikipedia.org/wiki/Endogenous_retrovirus
      http://en.wikipedia.org/wiki/Horizontal_gene_transfer

      Virus infects salmon, new virus being produced ends up incorporating part of salmon DNA, virus gets passed to cucumber, virus inserts salmon DNA into cucumber and it ends up incorporated into it's genome, new offspring has genetic material from both cucumber and salmon. In practice, there may have to be a number of intermediaries there, but that's the idea, and it's 100% natural, and has happened numerous times before, and the results of such can be seen in the DNA of a number of living things.

    8. Re:yeah, except for the true part by msobkow · · Score: 3, Informative

      That's a nice theory, but in reality they gene engineer entire strands of DNA in most cases, not just a few targetted genes. So our current level of GM technology is no better than old fashioned hybridization in terms of targetting specific traits.

      Worse, we really don't have a detailed understanding of genetics and their interactions. We know that specific genes affect traits, but we don't know how all the genes that affect those traits interact. We are jumping the gun with our current efforts, and it is not only possible but very likely that we're going to create some truly monstrous mutations in the near future.

      Worse, we have no idea what the long term interactions of the GM genetics will be. GMs are not sterile. They are mixing with native crops and infesting the gene pool; Monsanto and others rely on that infestation to sue farmers they claim are "stealing" their technology when their pollen infests neighbouring crops, and blocking farmers from using their own crops as seed stock.

      Personally I have far greater faith in the productivity of "land race" genetics produced by self-seeding crop land with last year's seed for 15-20 years sequentially. You end up with a plant that is tailor grown for the specific environment, whereas a GM crop is a shotgun approach that is tailored for a specific trait rather than the general growing conditions of the environment.

      As far as I'm concerned, GM crops to date have one purpose and one purpose only: to sell more pesticides and herbicides.

      --
      I do not fail; I succeed at finding out what does not work.
    9. Re:yeah, except for the true part by Cruciform · · Score: 4, Informative

      Here in Canada the tank of milk is sampled before it even leaves the farm. If it's contaminated they get hit with a heavy fine and the tank is dumped, for about 12k+ in losses for a single tank.
      It's in the best interest of the farmer to isolate every cow with mastitis or a high somatic cell count from the line as the testing can easily determine even a small amount of those contaminants.

  8. Re:Except that.. by Anonymous Coward · · Score: 3, Insightful

    Then virtually every single crop cultivated would then be defined as "Genetically Modified" if we went along with that logic. It astonishes me that people actually think this way and it scares the shit out of me that they could ever be in a position to make policy.

  9. Re:It was already in the genome by Cyberax · · Score: 4, Interesting

    No, lots of plants produce cyanide (in form of free CN ions) all the time. Its mostly poisonous because it shuts down a key enzyme in mitochondria, but plants have an alternative pathway that is not affected by it. So they can tolerate much higher levels of CN ions (they are still poisonous via other mechanisms, though).

    The famous example: cassava roots.

  10. NOW they'll get off my lawn! by couchslug · · Score: 4, Funny

    Also:

    "Moo!" (thud)

    --
    "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
  11. no, they are still quacks. by daninaustin · · Score: 3, Informative
    1. Re:no, they are still quacks. by yndrd1984 · · Score: 4, Insightful

      GM, in effect, is this process on steroids. - "BUT IT'S NOT ACTUALLY GM!!!!111" exit is just grasping for straws.

      What about the "lots of naturally occurring grasses do this, it just doesn't make the news" argument?

  12. Good plan. by daninaustin · · Score: 4, Insightful

    Let's get rid of all those awful hybrid plants and let most of the people in the world starve. We should be thankful for all the wonderful discoveries that saved billions of lives. http://en.wikipedia.org/wiki/Norman_Borlaug

  13. It's not GM by Alien+Being · · Score: 4, Funny

    This is a cross of Bluegrass, Kentucky Bluegrass, Featherbed Bent, and Northern California Sensemilia. The amazing stuff about this is, that you can play 36 holes on it in the afternoon, take it home and just get stoned to the bejeezus-belt that night on this stuff.

  14. Re:Ok, now THAT is a cool sci-fi story by Anonymous Coward · · Score: 3, Informative

    You're commenting on a story about a widely distributed GM grass unintentionally producing cyanide yet still believing the anti-GM crowd must be nuts?

    Yes the anti-GM crowd is nuts and this story only confirms it. The grass in this case was not Genetically Modified.

  15. Re:Ok, now THAT is a cool sci-fi story by tomhath · · Score: 4, Informative

    still believing the anti-GM crowd must be nuts?

    Yes, absolutely. Many grasses produce cyanide (usually called prussic acid by farmers). It's common and avoidable (Pro tip: never, ever let livestock graze near cherry trees. Wilted cherry leaves contain toxic levels of prussic acid). Plus this is not a GM plant, it's a hybrid.

  16. Re:Ok, now THAT is a cool sci-fi story by Anonymous Coward · · Score: 4, Insightful

    No, we're all commenting on a story about how grass has always done this and still does, but farmers don't pay attention in school and journalists think boring stories are more interesting if they make up a few facts like "this is GM grass and it has mutated" rather than asking a scientist who would say "Yeah, grass does that, fascinating isn't it?"

    The same is sadly true for human food. If you tell average people that the sausages have a perfectly safe GM ingredient, they freak out and won't eat them. Those sausages would be perfectly safe, but they're imagining they'll grow an extra head. But drop the sausages on the floor, or let uncooked pieces of chicken drip onto them, and they're fine with that, because that's just normal everyday danger that actually exists, nothing to get freaked out about.

  17. Re:Ok, now THAT is a cool sci-fi story by EdIII · · Score: 4, Insightful

    It does not make anybody "nuts". The information was corrected, and you can change your position after the fact.

    I'm anti-GM, and this is apparently just hybridization gone wrong. If anything, this shows how careful we have to be and not proceed with such a cavalier attitude towards research and implementation. This was 20 years. Keeping this in mind, the short term gains demanded by capitalism gone wrong make it seem pretty damn unreasonable and dangerous to not test the crap out of something like this for an extended period of time.

    For the record, my biggest gripe with GM is what I see as dangerously performed research (practically no containment of any kind), dangerous precedents in patent law (owning genetic sequences), using it as an excuse to saturate farms with pesticides (bad for environment, bad for food, and allows for rapid evolution of countermeasures in affected species), and its affect (by use) on seed diversity.

    Not to mention the logistical nightmare of recouping research and working out ownership of something that, by its very nature, can move and "infect" other crops. Monsanto deserves to burn in hell for all the grief they have given farmers simply because of the fucking wind acting as a ninja-like salesman.

  18. Grasses producing cyanide is not new or unknown. by Jerry · · Score: 3, Informative

    Tifton 85 was bred using PI290884, from South Africa, and Tifton 68, which is a cross between PI255450, from Kiboko, Kenya, and PI293606, from Nairobi, Kenya.

    See Fact Sheet - Cynodon Dactylon

    "Toxicity
    Some varieties have the potential to produce high levels of prussic or hydrocyanic acid (HCN), especially when high levels of nitrogen are applied. However, instances of prussic acid poisoning in cattle grazing C. dactylon are rare. Although levels of total oxalate of >1% of the DM have been recorded, there is no experience of detrimental effects on grazing cattle. Frosted C. dactylon can cause photosensitization.
    "

    What happened at ELGIN, Texas, is just an example of a RARE event. That the field in question has been in production for 15 years, and no other sites using Tifton 85 have reported animal deaths from cyanide, proves how rare the event is.

    Tifton 85 has nothing to do with the laboratory manipulation of DNA (Genes).

    --

    Running with Linux for over 20 years!

  19. Re:Ok, now THAT is a cool sci-fi story by sp332 · · Score: 4, Informative

    PI-290884 is the name of a sample of wild grass taken from South America. Tifton 68 is a hybrid of PI 255450 and PI 293606 which are both samples from Kenya. https://www.hort.purdue.edu/newcrop/proceedings1993/v2-294.html

  20. Re:meddle with nature and suffer the concequences by ChromeAeonium · · Score: 3, Insightful

    Since this was not a GMO at all, I expect this will be a big blow to conventional hybridization, right? Or are we going to apply a double standard and act as if dangers produced via hybridization should be ignored while dangers form GE (real or imaginary) are cause for panic?

    Meddle with nature and suffer the concequences you say? Enjoy your teosinte and goatgrass, and your poisonous potatoes, tomatoes, and beans. Enjoy your seedy bananas.and grapes, your small sour apples, your gritty pears, and the little flower heads on the wild mustard plants broccoli and cauliflower came from.. Because to do otherwise would be messing with nature. Hope those chemical defenses that were bred out of all our crop plants don't give you cancer.