Steve Koike


Steve Koike
Steve devoted 28 years to the University of California as an Extension Plant Pathologist, where he focused on applied research, grower education, and diagnostic problem solving. During his tenure with the UC Cooperative Extension, he conducted extensive research in California's Central Coast region, managed a plant pathology diagnostic laboratory, and delivered practical, science-based guidance to growers and industry professionals. His work consistently bridged the gap between research and real-world application.
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How To Distinguish Weather-Related Crop Injury From Disease
How To Distinguish Weather-Related Crop Injury From Disease

There has been outrageous weather in parts of our nation this year. “Bomb cyclones” were dropping hsnow and unleashing winds. Historically huge snowstorms paralyzed all transportation and interfered with daily tasks. Cold-paralyzed iguanas were falling from trees in Florida!

3/9/2026
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Honoring Steve Koike
Honoring Steve Koike

As Steve Koike enters retirement, we’re honored to spotlight his lasting impact on plant pathology. The TriCal blog highlights Steve’s decades of leadership, service, and contributions to the agricultural community, including his time with UC Cooperative Extension and TriCal Diagnostics.

1/21/2026
TriCal Diagnostics News
Steve Koike is retiring from TriCal Diagnostics
Steve Koike is retiring from TriCal Diagnostics

After eight years of exceptional leadership, renowned plant pathologist Steve Koike is retiring from TriCal Diagnostics. We’re proud to share that Dr. Hanane Stanghellini, will continue this legacy of excellence. Same team. Same methods. Same commitment to the agricultural community.

1/7/2026
Article
Discovering New Vegetable Diseases Always a Work in Progress
Discovering New Vegetable Diseases Always a Work in Progress

“New” is not a word you want to see associated with “vegetable disease concerns.” Growers, production advisors, and field professionals are periodically faced with new and unfamiliar diseases. Researchers have an established protocol for proving that a problem is a new one.

11/3/2025
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More Effective Disease Control in Your Vegetables via Crop Rotations
More Effective Disease Control in Your Vegetables via Crop Rotations

Plant diseases are one of the most challenging obstacles facing growers. A biological reality is that if a farmer grows the same crop too many times, and if the farmer puts in the same crop too often over a short period of time, pathogens will be harder to manage.

3/7/2025
Article
Unexpected Vegetable Disease Issues Can Lead to Unusual Findings
Unexpected Vegetable Disease Issues Can Lead to Unusual Findings

Yet another novel medical development is threatening people in some regions of the U.S. This concern is a Neisseria bacterium that is responsible for meningitis and bloodstream diseases. The “new” is a particular Neisseria strain that causes unusual, atypical symptoms.

11/6/2024
Article
Criteria for Successful Biocontrol Candidates on the Farm
Criteria for Successful Biocontrol Candidates on the Farm

Using biological agents to help manage plant diseases is no longer a novel concept. Research on biological candidates, development of biological products, and deployment of such materials in agriculture have been occurring for a long time.

3/7/2024

Trical Diagnostics
TriCal Diagnostics is a team of highly experienced plant pathology diagnosticians that has extensive knowledge of practical field plant pathology, microbiological and molecular identification techniques, plant pathology research, and production agriculture and horticulture.

Trical Inc.
"We are farm consultants, helping growers to get the greatest return on investment for their crop while helping them navigate the regulations and use requirements. We are custom applicators so we have hands-on, direct field experience. We provide field support and technicians. Just like my father (TriCal Co-Founder & President) said in 1963, 'we have proved the worth of these methods.' We work hand in hand with growers so they can reap the benefits."

- Dean Storkan, TriCal President