Professors Johan Leveau and Jorge Mazza Rodrigues will take over as chairs of the Department of Plant Pathology and Department of Land, Air and Water Resources, respectively, Dean Ashley M. Stokes from the College of Agricultural and Environmental Sciences announced.
The appointments took effect July 1, 2026.
Plant Pathology
Leveau, who is a microbial ecologist and professor, has served as interim chair since January, replacing Dave Rizzo.
In a time of increasing water scarcity and regulatory complexity, enhancing irrigation efficiency and improving on-farm water management practices are critical for California agriculture. Microirrigation – using highly efficient, low-flow and low-pressure systems that deliver water and nutrients close to plants’ roots – is one key solution.
Rows of tightly packed olive trees stretch across California’s Central Valley. These super-high-density orchards, where trees are planted close together for faster, mechanized harvesting, can grow strong with less fertilizer than expected, according to new research from the University of California, Davis.
In communities across California, residents are grappling with poor air quality, often without a clear understanding of the pollutants in their environment. In Vallejo, a neighborhood near a cement mixing plant struggles with constant dust on the inside of homes, including kitchen cabinets, counters and tables. Other communities contend with traffic and aircraft emissions, industrial pollution and seasonal wildfire smoke.
At least one-quarter of all nitrogen oxide (NOx) emissions in California’s Salton Sea air basin come from soil, according to a study from the University of California, Davis.
Growing beside sleek vertical solar panels, lush green pepper plants flourish at the height of summer. A team of UC Davis researchers are analyzing an agrivoltaics system that combines farming with solar technology to boost crop growth and promote sustainability.
This innovative approach, according to UC Davis Associate Professor Majdi Abou Najm with the Department of Land, Air and Water Resources, could be a valuable solution as California faces a hotter, drier climate.
Wading through flooded rice fields, a team of UC Davis students and researchers release thousands of shimmering fish into the water. These small golden shiners hold the promise of significant contributions to the dual challenges of climate change mitigation and sustainable food production.
Climate change is driving both the loss of biodiversity and the need for clean, renewable energy. It is also shifting where species are expected to live in the future. Yet these realities are rarely considered together. Where can clean energy projects be built without impacting the future habitat ranges of threatened and endangered species?
Adding crushed volcanic rock to cropland could play a key role in removing carbon from the air. In a field study, scientists at the University of California, Davis, and Cornell University found the technology stored carbon in the soil even during an extreme drought in California. The study was published in the journal Environmental Research Communications.
