Assessing the severity of cotton Verticillium wilt disease from in situ canopy images and spectra using convolutional neural networks  

作　　者：Xiaoyan Kang Changping Huang Lifu Zhang Mi Yang Ze Zhang Xin Lyu 

机构地区：[1]National Engineering Research Center of Satellite Remote Sensing Applications,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Xinjiang Production and Construction Corps Oasis Eco-Agriculture Key Laboratory,College of Agriculture,Shihezi University,Shihezi 832003,Xinjiang,China

出　　处：《The Crop Journal》2023年第3期933-940,共8页作物学报（英文版）

基　　金：funded by Key Research Program of Frontier Sciences,CAS(ZDBS-LY-DQC012);the National Natural Science Foundation of China(41971321,41830108);XPCC Science and Technology Project(2022CB002-01);Open Fund of Key Laboratory of Oasis Eco-agriculture,XPCC(201801 and 202003);supported by Youth Innovation Promotion Association,CAS(Y2021047)。

摘　　要：Verticillium wilt(VW)is a common soilborne disease of cotton.It occurs mainly in the seedling and bollopening stages and severely impairs the yield and quality of the fiber.Rapid and accurate identification and evaluation of VW severity(VWS)forms the basis of field cotton VW control,which has great significance to cotton production.Cotton VWS values are conventionally measured using in-field observations and laboratory test diagnoses,which require abundant time and professional expertise.Remote and proximal sensing using imagery and spectrometry have great potential for this purpose.In this study,we performed in situ investigations at three experimental sites in 2019 and 2021 and collected VWS values,in situ images,and spectra of 361 cotton canopies.To estimate cotton VWS values at the canopy scale,we developed two deep learning approaches that use in situ images and spectra,respectively.For the imagery-based method,given the high complexity of the in situ environment,we first transformed the task of healthy and diseased leaf recognition to the task of cotton field scene classification and then built a cotton field scenes(CFS)dataset with over 1000 images for each scene-unit type.We performed pretrained convolutional neural networks(CNNs)training and validation using the CFS dataset and then used the networks after training to classify scene units for each canopy.The results showed that the Dark Net-19 model achieved satisfactory performance in CFS classification and VWS values estimation(R^(2)=0.91,root-mean-square error(RMSE)=6.35%).For the spectroscopy-based method,we first designed a one-dimensional regression network(1D CNN)with four convolutional layers.After dimensionality reduction by sensitive-band selection and principal component analysis,we fitted the 1D CNN with varying numbers of principal components(PCs).The 1D CNN model with the top 20 PCs performed best(R^(2)=0.93,RMSE=5.77%).These deep learning-driven approaches offer the potential of assessing crop disease severity from spatial and spectral per

关 键 词：Canopy scale Cotton verticillium wilt Deep learning Disease assessment In situ imagery In situ spectrometry 

分 类 号：S435.621[农业科学—农业昆虫与害虫防治]