Early Drought and Disease Detection in Eucalyptus Clones at Scale

Planted Eucalyptus forests are increasingly threatened by changing climate. There is a need for an early warning system capable of monitoring large forest areas. Radar and optical imagery was successfully used to track leaf loss patterns.


The main symptom of drought, pest and fungal diseases in a forest area is the loss of leaves from the canopy. Different Eucalyptus clones exhibit high variability in resistance to these threats. An early warning system for forest damage would allow forest managers to act quickly to address health problems and reduce the loss of productive trees and stands.

Our client, a leading pulp and paper producer with large and distributed forest assets in Brazil, needed a cost-effective, high-frequency early warning system for forest damage. However, variable weather conditions common in Brazil and elsewhere require a combined optical and radar-based solution for monitoring purposes.



Radar and optical imagery successfully used to track leaf loss patterns

Case study disease detection in eucalyptus clones with satellite data/

The PlanetWatchers analytics platform combines SPOT optical and TerraSAR-X radar imagery to detect changes in forest structure and biomass. Radar imagery delivers reliable information regardless of cloud cover or fog.

The TerraSAR-X radar imagery is extremely sensitive to leaf loss in the canopy, a major symptom of various forest health conditions. 2017 SPOT imagery allowed differentiating areas of multiple Eucalyptus clones and was used as a calibration for the radar data.

Case study disease detection in eucalyptus clones with satellite data/

Change analysis of Eucalyptus plantation in Brazil. Areas of growth are marked with green, areas of leaf loss with red.

The analysis revealed forest areas of normal growth and areas suffering from decreased leaf area, allowing the identification of Eucalyptus clones that show resilience to drought and subsequent diseases.

The evaluation of radar and optical satellite data gives operations teams intelligence of the identifying factors related to drought and disease over large areas of Eucalyptus plantations.

PlanetWatchers’ analysis allows early intervention to control different forest health conditions. In the last few years, the annual loss due to drought impacted over 1.5 million hectares resulting in over $150 million of annual losses.
PlanetWatchers’ early detection of these areas enables clients to take preventive measures and reduce the yield loss by up to 40%.

  • All-weather analysis
  • Sensitive to various forest health conditions causing leaf loss
  • Enables early intervention to control forest diseases

The PlanetWatchers’ analysis can be applied to different types of forests across the globe to increase wood production and to protect natural forests.

Other areas of application include agriculture, energy production, mining and beyond.

Illustration eucalyptus diseased vs healthy case study
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Founded by experts in big data, remote sensing, and cloud computing, PlanetWatchers is a VC-funded startup dedicated to empowering natural resource intensive enterprises with actionable data to optimise their businesses. PlanetWatchers has offices in San Francisco and Tel Aviv.

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