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. Hydros Environmental Diagnostics - Producers of agricultural reagents and diagnostics kits for on site plant disease detection. Cornell University's Plant Disease Diagnostic Clinic - Provides diagnosis services to extension, homeowners, and commercial growers. 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. Texas Plant Disease Diagnostic Lab - The laboratory provides plant disease diagnostic service to Texas AgriLife Extension personnel, homeowners, farmers and growers.