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Journal of Integrative Agriculture  2022, Vol. 21 Issue (4): 1094-1105    DOI: 10.1016/S2095-3119(21)63707-3
Special Issue: 智慧植保合辑Smart Plant Protection
Plant Protection Advanced Online Publication | Current Issue | Archive | Adv Search |
Intelligent diagnosis of northern corn leaf blight with deep learning model
PAN Shuai-qun1, QIAO Jing-fen1, WANG Rui2, YU Hui-lin2, WANG Cheng2, Kerry TAYLOR1, PAN Hong-yu2
1 School of Computing, Australian National University, Canberra 2601, Australia
2 College of Plant Sciences, Jilin University, Changchun 130062, P.R.China
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Abstract  Maize (Zea mays L.), also known as corn, is the third most cultivated crop in the world.  Northern corn leaf blight (NCLB) is a globally devastating maize foliar disease caused by Setosphaeria turcica (Luttrell) Leonard and Suggs.  Early intelligent diagnosis and warning is an effective and economical strategy to control this disease.  Today, deep learning is beginning to play an essential role in agriculture.  Notably, deep convolutional neural networks (DCNN) are amongst the most successful machine learning techniques in plant disease detection and diagnosis.  Our study aims to identify NCLB in the maize-producing area in Jilin Province based on several DCNN models.  We established a database of 985 leaf images of healthy and infected maize and applied data augmentation techniques including image segmentation, image resizing, image cropping, and image transformation, to expand to 30 655 images.  Several proven convolutional neural networks, such as AlexNet, GoogleNet, VGG16, and VGG19, were then used to identify diseases.  Based on the best performance of the DCNN pre-trained model GoogleNet, some of the recent loss functions developed for deep facial recognition tasks such as ArcFace, CosFace, and A-Softmax were applied to detect NCLB.  We found that a pre-trained GoogleNet architecture with the Softmax loss function can achieve an excellent accuracy of 99.94% on NCLB diagnosis.  The analysis was implemented in Python with two deep learning frameworks, Pytorch and Keras.  The techniques, training, validation, and test results are presented in this paper.  Overall, our study explores intelligent identification technology for NCLB and effectively diagnoses NCLB from images of maize.
Keywords:  maize       northern corn leaf blight        Setosphaeria turcica        intelligent diagnosis        deep learning        convolutional neural network  
Received: 18 January 2021   Accepted: 22 March 2021
Fund: This work was financially supported by the Key Planning Projects on Science and Technology of Jilin Province, China (20180201012NY), the Inter-Governmental International Cooperation Special Project of National Key R&D Program of China (2019YFE0114200), and the National Key R&D Program of China (2017YFD0201802).
About author:  PAN Shuai-qun, E-mail: shuaiqun.pan@anu.edu.au; Correspondence PAN Hong-yu, Tel/Fax: +86-431-87835659, E-mail: panhongyu@jlu.edu.cn

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PAN Shuai-qun, QIAO Jing-fen, WANG Rui, YU Hui-lin, WANG Cheng, Kerry TAYLOR, PAN Hong-yu. 2022. Intelligent diagnosis of northern corn leaf blight with deep learning model. Journal of Integrative Agriculture, 21(4): 1094-1105.

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