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Bananas, one of the world’s favorite fruits, are under attack by two invisible foes: Moko disease and Black Sigatoka. In Ecuador, these pathogens have sharply cut yields, threatening the country’s economy. Traditionally, farmers inspect fields on foot, a slow, subjective process that often comes too late to stop the spread.

A research team decided to rewrite the rules using drones and artificial intelligence. They flew UAVs equipped with high‑resolution cameras over the plantations, collecting hundreds of leaf images. Then they trained an enhanced YOLOv8 model—renowned for fast object detection—to segment diseased areas.

After testing various configurations—deeper, lighter, with optimized hyperparameters—the final model achieved 79.6% precision and 80.3% recall, with a mean average precision (mAP) of 84.9% at a 0.5 IoU threshold. In practice, the system reliably spots infected leaves, distinguishing Moko symptoms from Black Sigatoka.

This technology not only speeds up diagnosis but makes it objective and scalable: launch the drone, analyze the photos, and apply targeted treatments instantly. The outcome is more sustainable plantation management, fewer pesticides, and a safer future for the bananas that reach our tables.

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The YOLOv8 (You Only Look Once version 8) model is a single‑stage convolutional neural network designed for real‑time object detection. In its segmentation variant, the backbone extracts hierarchical features from images, while the neck aggregates multi‑scale information via a Feature Pyramid Network (FPN). The segmentation head then produces binary masks for each detected instance.

When applied to UAV imagery, handling resolution variability and changing illumination is critical. The team employed advanced data augmentation (rotations, flips, color jitter) to make the model robust to these conditions. Hyperparameter tuning was performed using Bayesian optimization, adjusting learning rate, batch size, and the mask loss coefficient (a combination of Dice loss and BCE).

Reported metrics include precision (79.6%), recall (80.3%) and mAP@0.5 (84.9%). The mAP@0.5:0.95 of 62.9% indicates strong localization ability at stricter IoU thresholds. The model outperformed classification‑based approaches (e.g., ResNet‑50), especially in localizing disease symptoms spread over large leaf areas.

Finally, deployment on edge devices aboard the drone requires model quantization (INT8) to reduce latency and power consumption, with an accuracy loss below 2%. This enables real‑time processing, essential for timely field interventions.

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Authors:
Byron Oviedo
Date Published:
Original Article www.mdpi.com
Fact-check verified on 14/05/2026
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Creative Commons License CC BY-NC-SA 4.0

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