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Cumulative Stress Index

The Cumulative Stress Index is a scorecard of total orchard health, revealing where yield may be most impacted by stress. Use the index to identify the most vulnerable areas of your operation, evaluate the ROI on addressing issues, and protect the long-term health of your business.


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Common uses

  • Quantifying the impact of stress on yields
  • Prioritizing actions to improve orchard health
  • Optimizing irrigation strategy
  • Understanding year-over-year performance at the acre level
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How it works

Growers know that the long-term profitability of an orchard depends on identifying and intervening in areas that experience persistent stress. But most methods of gauging stress—whether with pressure bombs, tissue sampling, or visual inspection—have a serious limitation: it’s impractical to test enough trees to gain an accurate assessment of the entire orchard.

Ceres Imaging makes this holistic view possible by combining the perspective of aerial data with the power of machine learning. The Cumulative Stress Index quantifies likely impacts on yield, enabling growers to determine whether interventions will deliver positive ROI.

Use the Cumulative Stress Index mid-season to assess yield trends, or at the end of the season to refine irrigation strategies, map yields, and run cost-benefit analyses. 

From imagery to action

A four-year study with the University of California found that a 20% cumulative stress score corresponded with an 11% reduction in yields each year on average.

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Quantify the impacts of persistent stress

Dark purple represents the least stressed areas, while yellow areas are the most stressed. Each successive color on the scale corresponds to a 7%–8% increase in cumulative stress.

The Cumulative Stress Index can be delivered mapped to an acre-grid or to customized irrigation zones.

Ensuring accuracy

Ceres Imaging’s emphasis on quality begins even before we fly your fields.

Image capture

We capture imagery during peak daylight hours and under weather conditions that minimize distortion from shadows and cloud cover. Our highly sensitive, custom-built cameras detect minute changes in the multispectral range—allowing us to detect crop stress earlier than our competitors.

Processing and analysis

Imagery is geo-referenced and meticulously “masked” to ensure that only relevant information is evaluated. By making use of crop-specific data models and isolating the canopy from ground cover and other background noise, we prevent skewing of the data and enable a more accurate assessment of plant health.

Quality control

Imagery is assessed in-house by Ceres Imaging’s remote sensing experts, passing through multiple checkpoints before delivery in the Ceres Imaging app within 48 hours of the flight. Growers can access their data on a mobile device, tablet, or desktop computer.

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Contact us
The difference between Ceres Imaging and other technologies I've used is the help I get from their expert team.
Jake Samuel, Partner
Samuel Farms
With Ceres Imaging we can take a more targeted approach to applying fertilizer and nutrients.
Brian Fiscalini, Owner
Fiscalini Cheese Company
These flights can cover way more ground and provide more insight than a dozen soil moisture probes — and it's cheaper to implement.
Patrick Pinkard, Assistant Manager
Terranova Ranch
The average Ceres Imaging conductance measurement from its imagery over the season has provided the best correlation with applied water.
Blake Sanden
University of California Cooperative Extension