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Evaluating the efficacy of fungicides for wheat scab control by combined image processing technologies

文献类型： 外文期刊

作者： Zhang, Dongyan 1 ; Gu, Chunyan 1 ; Wang, Zhicun 1 ; Zhou, Xingen 1 ; Li, Weifeng 1 ;

作者机构： 1.Anhui Univ, Natl Engn Res Ctr Agroecol Big Data Anal & Appli, Hefei 230601, Peoples R China

2.Anhui Acad Agr Sci, Inst Plant Protect & Agroprod Safety, Hefei 230031, Peoples R China

3.Texas A&M Agri Life Res Ctr, 1509 Aggie Dr, Beaumont, TX 77713 USA

关键词： Wheat scab; Gibberella zea; Unet plus; CNN; Image segmentation and counting; Fungicide spraying

期刊名称：BIOSYSTEMS ENGINEERING （ 影响因子：4.123； 五年影响因子：4.508 ）

ISSN： 1537-5110

年卷期： 2021 年 211 卷

页码：

收录情况： SCI

摘要： Wheat scab, a major disease in wheat worldwide, is primarily controlled by fungicide application. Traditional methods used to evaluate fungicide efficacy are involved with manual counting of infected wheat heads in the field, which is time-consuming and laborious, and requires professional knowledge. This study developed a new method that could automatically and effectively assess the efficacy of fungicides in the field. Unet++ network and Fuzzy C-Means algorithm combined with R-G method (subtracting the green band from the red band in each image) were used to segment whole wheat ears and associated diseased areas, respectively. Proposed convolutional neural network (CNN) and connected domain method were then used to count all wheat ears and diseased wheat ears, respectively. The disease incidence of wheat ear groups was graded and the efficacy of five fungicides was evaluated. The results of these analyses show that the efficacy of all the five different fungicides was predicted accurately. The errors between predicted and measured levels of diseased wheat ears are less than 5%. The new method developed here can effectively assess the efficacy of fungicides for control of wheat scab under field conditions. (C) 2021 IAgrE. Published by Elsevier Ltd. All rights reserved.

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