摘要：
A sweeping electronic nose system (SENS) was self-developed to detect the presence of early infestation by Bactrocera dorsalis (Hendel) in citrus fruits. Principal component analysis (PCA) and linear discriminate analysis (LDA) were applied to analyze citrus fruits that were subjected to different types of treatments (invasion and incubation stage) caused infestation. The results indicated that the SENS could successfully detect the presence of early infestation by B. dorsalis in citrus fruits. The different types of treatments in citrus fruits could be effectively classified by PCA and LDA, respectively. Meanwhile, the specific infestation time of citrus fruits within treatment stage could be satisfactorily identified by LDA model with correct recognition rate of 98.21%. Importantly, an optimized sensor array achieved better performance in classification and discrimination than that of the non-optimized. This study showed the potential feasibility of the electronic nose technology for in-filed detection of postharvest pest infestation citrus fruits under market conditions.
作者机构：
[龚中良; 郑立章; 李立君; 谢洁飞] Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Education, Engineering College, South China Agricultural University, Guangzhou, 510642, China;School of Science, Central South University of Forestry and Technology, Changsha, 410004, China;[文韬] Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Education, Engineering College, South China Agricultural University, Guangzhou, 510642, China<&wdkj&>School of Science, Central South University of Forestry and Technology, Changsha, 410004, China<&wdkj&>School of Science, Central South University of Forestry and Technology, Changsha, 410004, China;[马强] School of Science, Central South University of Forestry and Technology, Changsha, 410004, China<&wdkj&>School of Science, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Education, Engineering College, South China Agricultural University, Guangzhou, China
作者机构：
[文韬; 郑立章; 龚中良; 李立君; 桑孟祥; 董帅] School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[文韬; 郑立章; 龚中良; 李立君; 桑孟祥; 董帅] 410004, China
通讯机构：
School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[文韬; 董帅; 龚中良; 李立君; 郑立章; 桑孟祥] School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[文韬; 董帅; 龚中良; 李立君; 郑立章; 桑孟祥] 410004, China
通讯机构：
School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[郑立章; 龚中良; 董帅; 桑孟祥] School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China;[文韬] School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, 410004, China<&wdkj&>Key Laboratory of Key Technology for South Agricultural Machinery and Equipment, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
通讯机构：
School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[文韬; 郑立章; 龚中良; 李立君; 谢洁飞] School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[马强] School of Science, Central South University of Forestry and Technology, Changsha;[文韬; 郑立章; 龚中良; 李立君; 谢洁飞; 马强] 410004, China
通讯机构：
School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, China
