4.7 Article

Detection of Strawberry Diseases Using a Convolutional Neural Network

Journal

PLANTS-BASEL
Volume 10, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/plants10010031

Keywords

strawberry diseases; convolution neural network; image recognition

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Funding

  1. Ministry of Science and Technology of Taiwan (MOST) [108-2622-E-239-007-CC3, MOST 107-2221-E-007 -110 -MY3]

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Strawberry is a high-value crop in Taiwan, but various diseases have significantly decreased production. Anthracnose crown rot caused substantial losses from 2010 to 2016. Utilizing a convolutional neural network model for image recognition can effectively detect strawberry diseases.
The strawberry (Fragaria x ananassa Duch.) is a high-value crop with an annual cultivated area of similar to 500 ha in Taiwan. Over 90% of strawberry cultivation is in Miaoli County. Unfortunately, various diseases significantly decrease strawberry production. The leaf and fruit disease became an epidemic in 1986. From 2010 to 2016, anthracnose crown rot caused the loss of 30-40% of seedlings and similar to 20% of plants after transplanting. The automation of agriculture and image recognition techniques are indispensable for detecting strawberry diseases. We developed an image recognition technique for the detection of strawberry diseases using a convolutional neural network (CNN) model. CNN is a powerful deep learning approach that has been used to enhance image recognition. In the proposed technique, two different datasets containing the original and feature images are used for detecting the following strawberry diseases-leaf blight, gray mold, and powdery mildew. Specifically, leaf blight may affect the crown, leaf, and fruit and show different symptoms. By using the ResNet50 model with a training period of 20 epochs for 1306 feature images, the proposed CNN model achieves a classification accuracy rate of 100% for leaf blight cases affecting the crown, leaf, and fruit; 98% for gray mold cases, and 98% for powdery mildew cases. In 20 epochs, the accuracy rate of 99.60% obtained from the feature image dataset was higher than that of 1.53% obtained from the original one. This proposed model provides a simple, reliable, and cost-effective technique for detecting strawberry diseases.

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