The Purdue University Plant and Pest Diagnostic Laboratory
is a central facility for receiving both physical
samples and digital
images submitted for identification of insects, plants and
plant diseases or diagnosis of plant and pest problems. This service
is provided for the specialists and county extension educators
of the Purdue University Cooperative Extension Service and Purdue
University's research faculty, staff, and students as well as for
private businesses and citizens of Indiana.
do not accept physical samples sent from outside the United States.
We recommend, due to potential regional differences in the occurrence
of certain plant diseases, and species of plants and insects, that
residents of other states first contact their local extension services
and diagnostic labs for assistance, prior to submitting digital
or physical samples to Purdue's Plant and Pest Diagnostic Lab (P&PDL).
Follow this link for University
Related Plant Disease and Soil Testing Services located in
the United States.
Identification and control recommendations for:
- Other multi-legged creatures
- Plant diseases
- Disease causing organisms, including Fungi
- Unknown plants, including weeds
- Nutritional problems*
- Other non-infectious problems
- Vertebrate pests
* The P&PDL does not provide soil or tissue
testing. You may wish to refer to this
abbreviated list of certified soil and plant analysis testing
labs (pdf file) for these services.
Michigan State University runs a Soil and Plant Nutrient Laboratory.
You may access submission and testing fee information at the following
Questions pertaining to Nematode identification should be addressed
to the Nematology Laboratory
May Use These Services?
Any individual sending samples from within the United
States (see note above). For example:
- Agribusiness Personnel
- Commercial Growers
- Cooperative Extension Personnel
- Crop Consultants
- Greenhouse Personnel
- Lawn and Garden Center Personnel
- Pest Control Operators
- Public Health Officials
- Turf Managers
- University faculty, staff, students
Per Sample Handling Fee for Routine* Diagnosis
of Physical Samples and Digital Images:
From within Indiana: $11.00
Outside of Indiana: $22.00
We accept payment in the form of cash, money orders, or personal checks. No credit card payments accepted.
*Routine diagnosis includes the initial physical or digital sample evaluation comprised of plant and insect/pest identification, microscopic examination of diseased plant/insect specimens, culturing of suspected disease-causing organisms on nutrient media and diagnosis of plant disorders caused by environmental, cultural, or chemical factors.
Diagnostic responses will
be sent by US mail, fax or electronic mail.
There will be no additional handling for any follow-up samples
that might be requested by diagnosticians who require additional
samples for a more accurate identification or diagnosis of
Additional Fee Assessment-->
Serological testing for certain
plant related viruses, fungi, and bacteria:
BIOLOG (metabolite utilization and chemo-sensitivity) Microbial identification of bacteria: $25.00
PCR Analysis: $25.00
*** Contact us with questions concerning specific
Insect, Plant and other Pest
Identification Requiring Additional Time
and Resources: $20.00/hr
*** In some instances,
necessary tests to identify causal
agents, insects, plants, or other
pests require additional time and
resources (ie. identification using
taxonomic keys). An hourly rate of
$20 (charged in 15 minute increments)
will be assessed for these exceptional
Physical Specimens | Submitting