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SCN in Pennsylvania: 

  • There has been an increase in the number of questions about nematodes.
  • While low in detection frequency and distribution, SCN has been documented in Pennsylvania and many believe that the distribution could be wider.
  • Best management recommendations require knowledge of SCN presence and population levels. root-illustration.png

SCN Distribution

SCN Management Recommendations

There are multiple tactics for managing SCN:

  • First and foremost, management begins with knowledge if SCN is a problem.
  • Sampling and testing of fields are important.
  • For Pennsylvania, the best management recommendations will depend on this new information.

What to know about soil testing for SCN:

  • Where in the field? As a starting point, we recommend soil sampling from high-risk areas where SCN could be present, such as, the field entryway, areas of high soil pH, areas where yields have been consistently lower, areas of fields that were previously flooded, and low spots in the field.
  • When?
    • Fall: non-host crop, soybean stubble
    • Spring: prior to soybean crop establishment
    • Growing Season: in the soybean crop root zone
  • How often? At this stage, given the limited distribution, the first step is to determine if SCN is a potential problem. As such, we recommend that a sample could be obtained at any time as indicated above (fall-spring-during season).

Pennsylvania State University Experts

Adriana Murillo Williams | Extension Educator

Pennsylvania State University


Alyssa Collins | Plant Pathologist

Pennsylvania State University


Paul Esker | Plant Pathologist

Pennsylvania State University


Other SCN Management Resources