Western Laboratories provides plant disease testing using traditional and DNA testing with the polymerase chain reaction (PCR).  Western Laboratories has been conducting traditional diagnoses since 1998 based on visual examination of plant parts and culture on semi-selective media.  In the last 2 years, Western Laboratories has successfully integrated DNA technology into its plant pathology program using PCR protocols in which species-specific DNA markers are amplified and detected using a real-time system.  DNA analysis allows detection of plant pathogens at much lower levels than are possible with traditional methods.  The DNA can be extracted from both soil and plant tissue. This year we are taking DNA testing to a new level with the addition of DNA probes that will improve specificity, lower detection level, and allow for multiplexing up to 3 diseases in a single analysis.   These probes are the cutting edge of DNA diagnostic technology.

The general list of diseases that can be tested for is growing steadily, therefore the list of diseases is never complete. We also offer disease testing packages for hops, potatoes, mint, onions and ornamental crops. These all can be found in the submission forms.

Download General Disease List and Submission Form

Download Hops Disease Submission Form

Download Potato Disease Submission Form

Download Ornamental Crops Disease Submission Form