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Mycotoxins in feedstuffs
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Discovery that a specific gene is integral to both fungal invasion of corn and development of a potentially deadly toxin in the kernels may lead to ways to control the pathogen and the poison. Purdue University researchers evaluated the fungal gene ZFR1 and found that it is vital to the process of the fungus growing on corn kernels. Production of the toxin decreased when the scientists disabled the gene. At certain levels, the toxin can cause illness in humans and most domestic...
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Bt corn is being planted at an ever-growing rate around the world. Aside from its primary benefit of insect pest protection, it has the important secondary benefit of reducing mycotoxin concentrations, because of the relationship between insect pest damage and fungal colonization. The currently-available varieties of Bt corn have shown strong evidence in field conditions worldwide of having significantly lower fumonisin levels than non-Bt isolines. There is also limited evidence for...
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National Corn Growers Association (NCGA) officials and others met with representatives from the U.S. Department of Agriculture’s Agricultural Research Service (ARS) yesterday in Washington, D.C., to seek an increase in funding and research to eliminate aflatoxin. NCGA Mycotoxin Committee Chairman Scott Averhoff and Texas Corn Producers Board Executive Director David Gibson were joined by representatives from the National Cotton Council of America, National Peanut Board, and Almond Board...
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A CCFRA-organised seminar, in association with Bayer CropScience, brought together growers, grain end users and scientists at the East of England showground, Peterborough, to discuss new developments in managing mycotoxins. Fungicides alone cannot be relied on Fungicide sprays alone cannot be relied on for fusarium and DON mycotoxin control, Masstock Arable agronomist Andrew Richards told the meeting. The introduction in 2006 of a maximum DON level...
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The University of Alberta warns, with this summer's combination of abundant rain and warm temperatures, livestock producers will need to be on alert for potentially elevated levels of fusarium infection in feed grains.
Fusarium head blight is a fungal infection that primarily affects cereal crops.
Fusarium graminearum, the strain of particular concern, is present throughout Manitoba and into Eastern Saskatchewan with the Red River Valley tending to face the highest risk.
University...
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Researchers to combat toxic brown mould with its non-toxic cousin.
In the early 1960s more than 100,000 turkeys died in Britain of cancer of the liver. Eventually, researchers identified mouldy peanut flour from Brazil containing large amounts of aflatoxin as the cause of this mysterious 'turkey X' disease. Even today the toxin is regarded as one of the most virulent natural carcinogenic substances.
The tasteless toxin is produced by the mould aspergillus...
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Recent hot wet weather conditions are increasing the risk of fusarium head blight developing in this year's winter wheat crops.
Fusarium graminearum, the strain of particular concern, is present throughout Manitoba and into Eastern Saskatchewan.
The toxins produced by the fungal disease are of particular concern to swine producers.
David Kaminski, a Farm Production Extension Pathologist with Manitoba Agriculture Food and Rural Initiatives, says the infection thrives under hot humid...
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What information is around on mycotoxins and how does it affect pigs? I would be interested to hear from others if they have come across this problem with grain and the problems they have encountered and how to get around contaminated grain. ...
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Grain quality is likely to have been affected by bad weather during the harvest. Pig producers are urged to be extra vigilant to ensure the quality of cereal grains going into feed is maintained so pig health, feed intake and performance do not suffer.
The wet weather has delayed harvest and also led to high grain moisture content, which increases the risk of mycotoxin development during storage.
Proper grain storage is the key. HGCA has urged growers to focus on wellestablished basics...
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Autumn is a good time to find out if you have mycotoxin contamination problems in your corn, especially if it is going to be fed to swine. Mycotoxins are compounds produced in grain by specific molds or fungi as secondary metabolites. However, presence of molds in grains does not automatically indicate mycotoxin presence.
Mycotoxin production can occur during plant growth and maturity or during storage of grains, and is influenced primarily by moisture level, temperature and availability of...
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Until now, scientists didn't know how to classify Stachybotrys chartarum, the black mold that can grow in humid, indoor environments and is often associated with "building sickness."
But an Agricultural Research Service scientist recently found that the toxin- producing fungus comprises a brand-new family within the order Hypocreales.
ARS mycologist Lisa A. Castlebury discovered that Stachybotrys' closest relatives are actually members of the genus Myrothecium, fungi that cause serious...
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