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About Us

Tylka lab at the World Soybean Research Conference IX in Durban, South Africa, February 2013


Virtually all of the work in the Tylka laboratory is focused on the soybean cyst nematode (SCN), Heterodera glycines. Through this site we hope to provide you with general information about SCN as well as specific information about our lab and our research. Read more about About Us

Christopher C Marett

Assistant Scientist I
Area of Expertise: 
Soybean Cyst Nematode field trials and product evaluations. Processing soil samples to quantify SCN infestations. General lab management duties.

Mark P Mullaney

Mark Mullaney profile picture
Research Associate I
Area of Expertise: 
Iowa State SCN Variety Trials

Mr. David H Soh

Manager Greenhouse
Area of Expertise: 
HG type test
SCN resistance screening
greenhouse management

Mr. Gregory D Gebhart

Greg Gebhart profile picture
Agricultural Specialist III
Area of Expertise: 
soybean research
plant pathology