Deep Learning for Sugarcane Disease Detection: A Field-Validated EfficientNet-B4 Approach

Abstract

Abstract

Sugarcane (Saccharum officinarum) serves as a critical economic mainstay in Pakistan, where it ranks among the top agricultural commodities. Devastating fungal and bacterial infections – particularly red rot (Colletotrichum falcatum), smut (Sporisorium scitamineum), and leaf scald (Xanthomonas albilineans) – inflict annual yield losses exceeding 20-50%, translating to crippling financial blows surpassing $350 million. Conventional disease identification techniques remain impractical for most farmers: they demand specialized expertise, involve time-consuming laboratory processes (typically 3-5 days), and prove cost-prohibitive across rural regions where sugarcane cultivation predominates.

This research pioneers an intelligent vision-based diagnostic system leveraging deep convolutional neural networks (CNNs) to automate sugarcane disease recognition directly from field imagery. To overcome dataset limitations endemic to agricultural AI applications, we compiled a comprehensive repository of 15,000 high-resolution field images capturing healthy and diseased specimens across diverse growth stages and environmental conditions. Strategic data augmentation through geometric transformations (multi-axis rotation, flipping, scaling) and photometric adjustments (variable brightness/contrast) expanded this corpus to 26,500 training samples. Three state-of-the-art architectures were rigorously evaluated: custom 8-layer CNN, ResNet50, and EfficientNet-B4, with the latter fine-tuned using transfer learning principles initialized on ImageNet weights.

The optimized EfficientNet-B4 model demonstrated exceptional proficiency, achieving 94% classification accuracy, 92% recall, and a 91% F1-score during real-world field validation – significantly outperforming traditional methods. Deployment occurs through an intuitive cross-platform application (mobile/web) enabling farmers to capture leaf/stem images and receive instant diagnoses (<2 seconds) with management recommendations, even offline. This work delivers three pivotal contributions: 1) A novel disease detection framework validated under operational farm conditions, 2) Public release of the largest curated sugarcane pathology image dataset to date, and 3) A farmer-centric tool advancing UN Sustainable Development Goals (SDGs) – specifically SDG 2 (Zero Hunger) through yield protection and SDG 9 (Industry, Innovation) by democratizing cutting-edge AI for precision agriculture.

Keywords: Deep Learning, Sugarcane Diseases, CNN, ResNet, EfficientNet, Image Classification, Precision Agriculture, SDGs.