Warning: The following pest reports have not yet been confirmed with the appropriate National Plant Protection Organization. They are provided solely as an early warning to NAPPO countries, and all National and Regional Plant Protection Organizations should use this information with caution.

Subject: First report of Columbia Root-Knot Nematode in Texas
Publicada: February 27, 2001
Source: Szalanski, A. L., et al. 2001. First report of Columbia Root-Knot Nematode (Meloidogyne chitwoodi) in potato in Texas. Plant Diseases. 85:000 (in press).
The Columbia Root-Knot Nematode, Meloidogyne chitwoodi, a nematode currently found in California, Colorado, Idaho, New Mexico, Nevada, Oregon, Utah and Washington, as well as Mexico, was found for the first time in Dallam county, Texas in October 2000. This nematode is an economically important pest on potatoes, causing external galls, internal spots and yield losses. It is a secondary pest on many other plants, including tomatoes, carrots, sugarbeets, and plants in the genus Potentilla.