生物灾害科学2025，Vol.48Issue(2)：267-272,6.DOI:10.3969/j.issn.2095-3704.2025.02.34
互叶白千层精油对烟草赤星病的防治研究
A research on the control effects of the essential oil of Melaleuca alternifolia on tobacco brown spot
摘要
Abstract
[Objective]This research was conducted to investigate the preventive and therapeutic effects of the essential oil from Melaleuca alternifolia on tobacco brown spot as well as its mechanism of action.[Method]The essential oil of Melaleuca alternifolia was prepared by steam distillation and gas chromatography-mass spectrometry(GC-MS),and its components were identified.Then,the inhibitory effect of Melaleuca alternifolia essential oil on Alternaria alternata and the control effect on tobacco brown spot were determined through the growth rate method,vitro leaf experiment,and potted disease prevention experiment.[Result]The experimental results indicated that:the main component of the essential oil extracted from Melaleuca alternifolia in this study was Terpinen-4-ol,with a relative content of about 46%.The inhibitory effect on Alternaria alternata was concentration dependent,with the highest inhibition rate reaching 78.14%-80.22%,which could cause abnormal hyphal growth and had broad-spectrum resistance.The vitro leaf experiment showed that the leaves treated with 8 mg/mL of Melaleuca alternifolia essential oil were green in color,with no growth of Alternaria alternata on the back,and the control effect was 71.2%.The results of indoor pot experiments showed that foliar spraying of 8 mg/mL of Melaleuca alternifolia essential oil on tobacco seedlings could effectively reduce the disease index of tobacco brown spot,with a control effect of 65.3%on tobacco brown spot,an increase of 34.4%compared to that of 40%net 500 fold dilution(48.6%),and the control effect was significant.[Conclusion]The above results indicate that the essential oil of Melaleuca alternifolia has certain potential for the application in the prevention and control of tobacco brown spot,and can be promoted and used in the field.关键词
互叶白千层/植物精油/链格孢菌/烟草赤星病/防效Key words
Melaleuca alternifolia/essential oil/Alternaria alternata/tobacco brown spot/control effect分类
农业科技引用本文复制引用
邓全,刘东阳,刘挺,冯佳,王杰..互叶白千层精油对烟草赤星病的防治研究[J].生物灾害科学,2025,48(2):267-272,6.基金项目
中国烟草总公司重大科技项目[110202101057(LS-17)]和四川省烟草公司凉山州公司科技项目 （LS-17）
