- best laboratory test center -

Accurate Plant Disease Detection

Early diagnosis, better harvest.

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- best laboratory test center -

Seed, Soil & Water Testing

Know what you're growing from.

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- best laboratory test center -

Supporting Sustainable Agriculture

Healthier fields, smarter farming.

Our Services
-PlantPathLab (California Agri Diagnostics) -

Pioneering Precision in Plant Health

We’ve got over 25 years of diagnostic excellence.

At PlantPathLab(California Agri Diagnostics), we’re not just testing—we’re transforming the future of farming.

With cutting-edge diagnostics for plant, seed, soil, and water health, we help growers around the world take the guesswork out of crop management. Our mission? To catch plant diseases before they spread, protect your harvest, and unlock higher yields with sustainable precision agriculture.

Trusted by growers for timely and accurate results.

Serving both local farmers and global agricultural clients.

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- Our Services -

Our Popular Test services.

Plant Testing

Protect your crops from harmful plant diseases with CAD's expert diagnostics. Get accurate identification and targeted solutions to ensure a healthy, high-yield harvest.

Seed Health Testing

Ensure healthy crop beginnings with CAD’s Seed Health Testing. Detect seed-borne diseases early to prevent stunted growth and boost yield potential.

Soil & Water Testing

Detect hidden plant pathogens in your soil and water with CAD’s early diagnostics. Prevent disease outbreaks and safeguard your crop yield before problems arise.

Grapevine Disease Testing

Safeguard your vineyard with CAD’s advanced grapevine disease diagnostics. Early, accurate detection helps protect yield, grape quality, and your bottom line.

- Our Services -

Our Popular Test services.

Plant Testing

Protect your crops from harmful plant diseases with CAD's expert diagnostics. Get accurate identification and targeted solutions to ensure a healthy, high-yield harvest.

Seed Health Testing

Ensure healthy crop beginnings with CAD’s Seed Health Testing. Detect seed-borne diseases early to prevent stunted growth and boost yield potential.

Soil & Water Testing

Detect hidden plant pathogens in your soil and water with CAD’s early diagnostics. Prevent disease outbreaks and safeguard your crop yield before problems arise.

Grapevine Disease Testing

Safeguard your vineyard with CAD’s advanced grapevine disease diagnostics. Early, accurate detection helps protect yield, grape quality, and your bottom line.

Science-backed farming made simple.

Know your soil. Protect your yield.
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Doctor
35 Years Of Experience
- Questions & Answers -

Soil Testing Question and Answer.

We will give you a complete account of the system and expound is the theen teachings of the great explorer of the truth is the master builde of human happiness no because it is pleasure.

We will give you a complete account of the system and expound is the theen teachings of the great explorer of the truth is the master builde of human happiness no because it is pleasure.

We will give you a complete account of the system and expound is the theen teachings of the great explorer of the truth is the master builde of human happiness no because it is pleasure.

Plant & Soil Health Testing

Supporting Stronger Crops, Naturally

Healthy crops don’t happen by chance—they grow from knowledge, care, and science. At PlantPathLab(California Agri Diagnostics), we provide the insights growers need to make better choices for their plants, soil, and future. Our mission is to help you grow stronger, yield more, and farm smarter.

Plant & Seed Testing

Soil & Water Analysis

Data-Driven Growth

- Our Testimonials -

What Our Clients Says

Bryan Van Groningen

Vice President, Crops & Soils, Van Groningen & Sons, Inc.

As Vice President of Crops & Soils at Van Groningen & Sons, Inc., I’ve relied on PlantPathLab (California Agri Diagnostics) for many years. Sam Livingston and his team consistently provide thorough soil, plant, and seed testing that has become essential to how we farm. 

Sam Gnanamanickam

Senior Principal Scientist, R&D, Biotech Innovations.

"PlantPathLab (California Agri Diagnostics) located in Stockton, CA are known to me as superior, quality-minded service providers. They can provide diagnostic needs for your crop and can afford help in the Registration of your Products in the State. I provide an unwavering recommendation and support".

Ben Waddell

Fruit Growers Laboratory

"I have been a client of Dr. Sam and PlantPathLab (California Agri Diagnostics) for many years, and they have always delivered! Service is fast, friendly, and results are clear and accurate. I have always been able to count on Dr. Sam."

Tom Hart

Hart Crop Consulting

“Everyone there has treated me as a valued customer. I appreciate your professionalism and I have enjoyed doing business.”