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Agritest - Provide diagnostic kits and related products for plant virus detection and diagnosis.
BIOREBA - Offers antibodies and ELISA kits for detecting virus pathogens in potatoes, grapevines, fruit trees, small fruits, ornamentals, vegetables, and field crops.
Centre for Innovation and Development in Plant Health - Center at the University of Girona dedicated to research, technology transfer, training and consulting in detection, identification and control of plant pathogens.
Cornell University's Plant Disease Diagnostic Clinic - Provides diagnosis services to extension, homeowners, and commercial growers.
Hydros Environmental Diagnostics - Producers of agricultural reagents and diagnostics kits for on site plant disease detection.
LOEWE Phytodiagnostica - Offers high-quality reagents for the detection of plant diseases, and diagnostic testing services.
Pest Diagnostic Clinic - Provides plant disease diagnoses, nematode counts, and insect and plant identifications. Contains information on submission of samples, fact sheets, and guidelines on nematode and Verticillium (in soil) control.