Date: 2009-08-10
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LINCOLN, Neb. — Last year soybean cyst nematodes cost Nebraska soybean growers more than $25 million in yield losses, often without being detected. Yield losses of 20-30 percent have been documented in the state with no above ground symptoms, said John Wilson, University of Nebraska-Lincoln Extension educator in Burt County.
(Media-Newswire.com) - LINCOLN, Neb. — Last year soybean cyst nematodes cost Nebraska soybean growers more than $25 million in yield losses, often without being detected.
Yield losses of 20-30 percent have been documented in the state with no above ground symptoms, said John Wilson, University of Nebraska-Lincoln Extension educator in Burt County.
"If you have SCN in your fields and are not managing it, you contributed to that loss," Wilson said.
To help bring down these staggering losses, four UNL Extension field days in late August and early September will help alert growers to the damage caused by soybean cyst nematodes in Nebraska.
The field days will help farmers and agricultural professionals learn to identify and manage soybean cyst nematode to minimize its impact on yields, Wilson said.
"If SCN caused holes, lesions, spots or other plant abnormalities, it would be much easier to convince producers to test for and manage it," said Loren Giesler, UNL Extension plant pathologist. "However, infested plants usually look healthy. The first indication of a problem is soybean yields that have leveled off or even started to drop while corn or other crop yields in the same field continue to improve."
Originally identified in counties bordering the Missouri River, soybean cyst nematodes have been identified in 48 counties in eastern and central Nebraska as far west as Boyd, Holt, Valley, Buffalo, Kearney and Red Willow counties. As soybean production has moved across the state, so has the distribution of soybean cyst nematodes.
The 2009 Soybean Cyst Nematode Field Days will be held on:
– Aug. 18, 10 a.m., Jerry Johnson farm. From Highway 116 and Highway 20 junction east of Laurel, go 2 miles west on Highway 20, then 4.75 miles north on 575th Avenue (west side).
– Aug. 18, 6:30 p.m., ground farmed by Lynn Rader. From Highway 20 and Highway 14 junction east of Royal, go 1 mile west on Highway 20, then a half mile south on 523rd Avenue (west side).
– Aug. 26, 6:30 p.m., ground farmed by Randy Blomker. From Herman, go 1 mile south on Highway 75, then 2.5 miles east on County Road P4 (north side).
– Sept. 4, 6:30 p.m., ground farmed by Brian & Jim Vech. From Cedar Bluffs: go 6.5 miles west on County Road X (south side).
At each SCN Field Day site participants will be able to:
– see SCN-resistant and susceptible soybean varieties.
– examine cysts on infested soybean plant's roots,
– learn how to identify and manage SCN infestations,
– receive a kit for one free SCN analysis (a $20 value), and
– get answers to your questions on SCN.
At 12 SCN-infested field day sites in 2006-2008, soybean cyst nematode-resistant varieties out-yielded susceptible varieties by an average of 5 bushels. These infested sites had low to moderate levels of infestation. There was no significant difference in yield between the same susceptible and resistant varieties at sites which were not infested with soybean cyst nematodes.
The Soybean Cyst Nematode Management Field Days are presented by UNL Extension with support from the Nebraska Soybean Board. Registration is the day of the field day. For more information, contact a local UNL Extension office.
8/6/09-SK
Contacts:
John A. Wilson
Northeast Research and Extension Center
Extension Educator - Burt County
(402) 374-2929
Loren Giesler - Ph.D.
Plant Pathology
Plant Pathologist
(402) 472-2559
Sandi Alswager Karstens
IANR News and Photography
(402) 472-3030