Soybean cyst nematode is considered the number 1 pest of soybeans that is found in several soybean producing states. It can cause significant yield losses due to inhibiting healthy root development. Estimated losses are 64 million bushels nationwide. Individual growers may see yield losses of 10-15%, although in heavily infested fields the losses may be as high as 50%. Symptoms of infection can include patches of stunted yellowing plants. Infected plants in sandy soils tend to show more stress due to soybean cyst nematode than do those in other soil types. Infected plants have poorly developed fibrous root systems with fewer Rhizobium nodules.
In March of 2014, 9 Perry County fields were sampled for soybean cyst nematode. Three fields were in locations easily flooded by the Ohio River that included both the east and west portions of the county. The remaining six fields were several miles from the Ohio River, although one bordered the Anderson River in the northwest corner of Perry County. The Purdue Nematology Laboratory in the Department of Entomology evaluated the samples. All three of the river fields, although separated by several miles were heavily infested with soybean cyst nematode to the point where control measures were recommended. Light infestations were found in fields several miles from the river.
Since all river fields tested were observed to be infested with soybean cyst nematode, the Perry County Extension Office recommends that farmers with fields bordering the Ohio River test their soybean fields through the Purdue Nematology Laboratory. This test costs $10 per sample and can take up to two weeks. Instructions for taking and submitting a sample can be found with the submission form here. Farmers with fields in the remainder of the county should test for soybean cyst nematode if symptoms of infection are present in the field.
Additional Soybean Cyst Nematode Resources
Purdue Extension Publication on Soybean Cyst Nematode
Purdue Extension Publication on Winter Weeds and Controlling Soybean Cyst Nematode
USDA Agricultural Research Service on Soybean Cyst Nematode