Phytosanitary Alert System Logo
    Home     |     Emerging Pest Alerts    |     Official Pest Reports    |     Archive    |     Resources
Print This Page
Generic News Alert Icon

New cyst nematode discovered on corn in Tennessee, United States


Name: Unknown

Common Names:

Cyst Nematode


Nematologists have discovered a new cyst nematode in soil samples taken from a field in northwestern Tennessee in 2006.  The report was confirmed in July 2007.  The samples taken from soil around stunted corn plants revealed juveniles and lemon-shaped cysts.  The nematode has physical characteristics that differentiate it from Heterodera species, including the corn cyst nematode, Heterodera zeae.  Genetic analyses confirmed the cysts differed from Heterodera zeae, but resulted in a match with cyst specimens collected in Tennessee in 1978 from goosegrass (Eleusine indica).  So far, the nematode is reported to reproduce well on a variety of hybrid corn cultivars, but reproduced poorly on other monocots that were tested.  No dicot hosts have been reported.

Issues of Concern:

If this nematode spreads to other crop production systems or areas, it could make differentiation from other cyst nematodes difficult, particularly if sampling and monitoring programs are in place.



Bernard, E., P.A. Donald, Z.A. Handoo, R. Heinz, and T. Powers.  2007  Characterization of a New Species of Cyst Nematode Parasitizing Corn.  Journal of Nematology. 39: 74.


Tylka, G. 2007. New cyst nematode species on corn.  Integrated Crop Management.  Iowa State University Extension.

Warning: The information in this alert has not been confirmed with the appropriate National Plant Protection Organization and is provided solely as an early warning. Please use the above information with caution.

Phytosanitary Alert System
Pest Alert
Prepared on: 08/08/2007
     Subscribe    |     About Us    |     Collaborators Only    | en Español
To view PDF's on this site - download the Adobe Reader.
Copyright © 2000-2019.
NSF Center for Integrated Pest Management