How Can Wild Plants Help Prevent Crop Loss?

Why It Matters

Understanding altitude‑linked disease patterns equips breeders and farmers with actionable strategies to safeguard yields against climate‑driven pathogen threats.

Key Takeaways

• 20% of crop yields lost annually to pests and pathogens.
• Wild plant genetics offer resistance traits for climate‑adapted crops.
• Flax‑rust spreads faster at lower elevations due to early snowmelt.
• Warmer temperatures accelerate pathogen spread, shortening growing seasons.
• Undergraduate field research provides unique high‑altitude epidemic data.

Summary

The video examines how wild plant genetics can help curb the roughly 20% annual crop loss caused by pests and pathogens, focusing on a multi‑year study of flax and its rust pathogen across the Rocky Mountains.

Researchers tracked the epidemic over seven summers, finding that the rust spreads more quickly at lower elevations where earlier snowmelt and higher temperatures create favorable conditions. Conversely, higher altitudes slow disease progression, highlighting climate’s direct role in pathogen dynamics.

Jessica, a Princeton undergraduate, notes the scarcity of altitude‑spanning epidemic data and credits funding from the High Meadows Environmental Institute for enabling the unique dataset. She emphasizes the collaborative nature of the project, which blends cutting‑edge science with hands‑on student training.

The findings suggest that breeding programs can tap wild relatives’ resistance genes and adapt crop management to elevation‑specific climate trends, offering a pathway to more resilient agriculture as growing seasons shorten and droughts intensify.

Original Description

A fifth of agricultural productivity is lost to pests and disease every year — and those crop losses are increasingly exacerbated by climate change. But researchers at Princeton are investigating wild plant pathogens to better understand potential genetic resistance to heat and drought.

Since 2018 a team of researchers — including Princeton undergraduates on High Meadows Environmental Institute (HMEI) internships — have conducted fieldwork at Colorado’s Rocky Mountain Biological Laboratory, studying wild Linum lewisii (Lewis flax) and its fungal adversary, Melampsora lini (flax rust).

By tracking the pathogen’s spread across time, temperature and elevation, researchers can better understand how environmental conditions influence plant health — and apply those learnings to real-world solutions for farmers and eaters worldwide.

Research team: C. Jessica Metcalf, Professor of Ecology and Evolutionary Biology and Public Affairs; Amanda Gibson, Associate Professor of Biology, University of Virginia; Juliana Jiranek, Ph.D. Candidate, University of Virginia