College of Agricultural Sciences

About the OSU College of Agricultural Sciences: Through its world-class research on agriculture and food systems, natural resource management, rural economic development and human health, the College provides solutions to Oregon’s most pressing challenges and contributes to a sustainable environment and a prosperous future for Oregonians.

New AI model improves accuracy of food contamination detection

CORVALLIS, Ore. – Researchers have significantly enhanced an artificial intelligence tool used to rapidly detect bacterial contamination in food by eliminating misclassifications of food debris that looks like bacteria.

Current methods to detect contamination of foods such as leafy greens, meat and cheese, which typically involve cultivating bacteria, often require specialized expertise and are time consuming — taking several days to a week.

Changes to cougar diets and behaviors reduce their competition with wolves in Yellowstone, study finds

CORVALLIS, Ore. – A new study shows that interactions between wolves and cougars in Yellowstone National Park are driven by wolves stealing prey killed by cougars and that shifts in cougar diets to smaller prey help them avoid wolf encounters.

The study, published at a time of growing overlap between cougar and wolf habitats in the western United States, found wolves occasionally killed cougars, but cougars did not kill wolves.

Human feelings influence beliefs about cat emotions and well-being, study shows

CORVALLIS, Ore. – People rated cats as having a more positive emotional state when shown indoors rather than outdoors, even those who believe cats should roam freely outside, a new study found.

The study also found that other contextual factors, such as the color of cats’ coats and a person’s own emotional state, impacted human perception of cat emotion.

Researchers develop first-ever common language for cannabis, hemp aromas

CORVALLIS, Ore. – Researchers have taken a significant step toward creating a standardized language for describing the aromas of cannabis and hemp.

“Aroma plays a key role in how consumers judge cannabis quality, yet until now there’s been no standardized language to describe it,” said Tom Shellhammer, professor of food science and technology at Oregon State University. “This research lays the groundwork for a shared vocabulary that benefits consumers, retailers and growers.”

Oregon Farm to School Network launches 10-year vision plan

CORVALLIS, Ore. — Building on nearly two decades of success, Oregon is planting the seeds for a healthier, more resilient future. 

The Oregon Farm to School Network, which includes the Oregon State University Extension Service, has released Oregon Harvest for Schools: 10-Year Strategic Vision for Oregon Farm to School (2025–2035) — a transformative roadmap to ensure every child has access to delicious, nutritious local food while supporting Oregon’s farmers, food makers, educators and communities.

Smartphone-powered AI predicts avocado ripeness

CORVALLIS, Ore. – Researchers have developed a smartphone-based artificial intelligence system that accurately predicts the ripeness and internal quality of avocados.

“Avocados are among the most wasted fruits globally due to overripeness,” said Luyao Ma, an assistant professor at Oregon State University. “Our goal was to create a tool that helps consumers and retailers make smarter decisions about when to use or sell avocados.”

Jaguar population increases after wildfire and drought, indicating area’s role as climate refuge

CORVALLIS, Ore. – Following a large-scale wildfire, more jaguars migrated to a study site in the Brazilian wetlands that already had the largest population density of jaguars in the world, a new study found.

“Finding even more jaguars and other mammals in the study area following the 2020 wildfire and extreme drought suggests that it may serve as a climate refuge, buffering the effects of extreme climate events,” said Charlotte Eriksson, a post-doctoral scholar at Oregon State University.