Soybean cyst nematode is probably the most damaging soybean pathogen—and it is quickly spreading

Christopher Marett (left) and Gregory Tylka (proper) Credit score: Christopher Marett and Gregory Tylka

The soybean cyst nematode (SCN) is probably the most damaging pathogen of soybeans in america and Canada and it’s spreading quickly, in line with info compiled by Gregory Tylka and Christopher Marett, nematologists at Iowa State College. SCN was first present in america in 1954 and most up-to-date estimates present that SCN ends in $1.5 billion in annual yield losses.

“The persevering with unfold of SCN is alarming, however not stunning,” stated Tylka. “Something that strikes soil can transfer the nematode, together with wind, water, and farm equipment.” In an article revealed in Plant Well being Progress, Tylka and Marett report that SCN was present in 55 new counties in america and 24 new counties and rural municipalities in Canada between 2017 and 2020. Most dramatically, New York State, which noticed SCN in just one county pre-2017, reported SCN in 29 new counties, and Manitoba reported SCN for the primary time in 2017.

The nematode is well ignored because it usually doesn’t trigger apparent aboveground signs for a number of years, even because it begins to instantly scale back yields. “Farmers usually assume that they don’t have SCN as a result of the soybeans do not look sick,” stated Tylka. “That is an unlucky mistake as a result of SCN numbers are low when the nematode is first launched right into a subject, however these numbers improve steadily if left unmanaged.”

Tylka urges all soybean farmers to check their fields for the presence of SCN by soil sampling earlier than each second or third soybean crop, even when the pathogen has by no means been discovered of their fields earlier than. He additionally underscores the necessity for continued funding in fundamental and utilized analysis on the biology and administration of SCN by non-public trade, authorities analysis funding businesses, and soybean checkoff organizations.

His analysis group additionally strives to achieve soybean farmers and people who advise them via the SCN Coalition.

Aphids are hanging soybeans sooner than anticipated

Extra info:
Gregory L. Tylka et al, Recognized Distribution of the Soybean Cyst Nematode, Heterodera glycines, in america and Canada in 2020, Plant Well being Progress (2021). DOI: 10.1094/PHP-10-20-0094-BR

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American Phytopathological Society

Soybean cyst nematode is probably the most damaging soybean pathogen—and it is quickly spreading (2021, Could 4)
retrieved 4 Could 2021

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