Credit: Christopher Marett and Gregory Tylka
The soybean cyst nematode (SCN) is the most damaging pathogen of soybean in the United States and Canada and it is spreading rapidly, according to information compiled by Gregory Tylka and Christopher Marett, nematologists at Iowa State University. SCN was first found in the United States in 1954 and most recent estimates show that SCN results in $1.5 billion in annual yield losses. The continuing spread of SCN is alarming, but not surprising, said Tylka. Anything that moves soil can move the nematode, including wind, water, and farm machinery. In an article published in
Plant Health Progress, Tylka and Marett report that SCN was found in 55 new counties in the United States and 24 new counties and rural municipalities in Canada between 2017 and 2020. Most dramatically, New York State, which saw SCN in only one county pre-2017, reported SCN in 29 new counties, and Manitoba reported SCN for the first time in 2017.
American Phytopathological Society
The soybean cyst nematode (SCN) is the most damaging pathogen of soybean in the United States and Canada and it is spreading rapidly, according to information compiled by Gregory Tylka and Christopher Marett, nematologists at Iowa State University. SCN was first found in the United States in 1954 and most recent estimates show that SCN results in $1.5 billion in annual yield losses.
“The continuing spread of SCN is alarming, but not surprising,” said Tylka. “Anything that moves soil can move the nematode, including wind, water, and farm machinery.” In an article published in Plant Health Progress, Tylka and Marett report that SCN was found in 55 new counties in the United States and 24 new counties and rural municipalities in Canada between 2017 and 2020. Most dramatically, New York State, which saw SCN in only one county pre-2017, reported SCN in 29 new counties, and Manitoba reported SCN for the first time in 2017.
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IMAGE: As hemp begins to reemerge as an important crop in the United States, scientists are beginning research into the diseases that might prevent the crop from flourishing. A study published. view more
Credit: Lindsey D. Thiessen
As hemp begins to reemerge as an important crop in the United States, scientists are beginning research into the diseases that might prevent the crop from flourishing. A study published in the December issue of
Plant Health Progress is one of the first to study the potential disease and disorder limitations for hemp production in the southeastern United States.
Lindsey Thiessen, a plant pathologist at North Carolina State University, worked with colleagues to evaluate hemp samples from North Carolina and observed 16 different diseases. They found Fusarium flower blight most consistently followed by Helminthosporium leaf spot. They also surveyed hemp producers who self-identified Fusarium species as the most common issue in their