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Fungal disease noted in US Kansas winter wheat crop
Jun. 11, 2015
A fungal disease known as head scab has emerged in winter wheat crop in parts of Kansas, the biggest U.S. producer of the grain, a crop expert said.
Head scab, also known as Fusarium head blight, can infect wheat with a byproduct called vomitoxin, which sickens animals and people if consumed in large quantities.
Wheat is most vulnerable to scab when wet conditions are present during flowering, the crop's reproductive phase. That phase occurred in Kansas in May, when most of the state recorded above-normal precipitation. Harvest should begin in the state later this month.
Grain elevators can test for vomitoxin, and many impose discounts against wheat contaminated with more than 2 parts per million (ppm). The U.S. Food and Drug Administration limits vomitoxin in food products to 1 ppm, while certain kinds of livestock feed can contain slightly higher levels.
Wheat growers across the southern Plains have already had to contend with various yield-robbing diseases, particularly stripe rust, due to wet conditions this season.
In Texas and Oklahoma, historic amounts of rain in May eliminated a multi-year drought but swamped wheat fields in some areas. The wet weather has delayed the start of the harvest there and raised the risk of sprouting in mature grain, a significant quality problem.
Source: Reuters
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