Abstract
Simple SummaryThis study is an important contribution to the development of biopesticide materials for controlling major pathogens in rice. Chrysoeriol 7 and cochlioquinone 9, which repel the white-backed planthopper, were extracted from rice and their antimicrobial activity was investigated. The results show they are effective in limiting the growth of pathogens of the genera Fusarium, Cladosporium and Pythium. This shows that they have great potential as an alternative to chemical pesticides and is also thought to be helpful in development of eco-friendly agriculture.As environmental damage caused by chemical pesticides appears worldwide, eco-friendly agriculture is increasing, and finding eco-friendly pesticide materials has become very important. Chrysoeriol and cochlioquinone, two flavonoids, act as an antibacterial and antioxidant, and increase the resistance of rice to the white-backed planthopper (WBPH). In this experiment, chrysoeriol 7 (C7) and cochlioquinone 9 (C9) were extracted from rice inoculated with the WBPH using MeOH, and cultivars with high extraction efficiency were selected. In addition, the antimicrobial activity of C7 and C9 against various pathogens causing disease in rice was tested. The results show that C7 has antifungal activity against Fusarium graminearum and Pythium graminicola, and C9 show antifungal activity against Cladosporium herbarum, Cladosporium cladosporioides, Gibberella zeae, Fusarium graminearum and Pythium graminicola. When both substances were treated at a concentration of 1000 ppm, they showed high inhibition rates of 62.3% and 36.2% against P. graminicola, respectively. After that, a phylogenetic tree was created to clarify the relationship between the microorganisms whose growth was inhibited and divided into three groups. This result can contribute to the study of biopesticide materials that can control pests and pathogens.
Highlights
Rice (Oryza sativa L.) is the main food crop for more than 50% of the world’s population, making it one of the most important crops in the world
We investigated the antimicrobial activity of chrysoeriol 7 and cochlioquinone 9 against rice pathogens by extracting and separating the white-backed planthopper (WBPH)-resistant material from rice, and judge their potential as eco-friendly pesticide alternatives
In order to overcome the environmental damage caused by chemical pesticides, we tried to find eco-friendly biopesticide material that can control pests and pathogens
Summary
Rice (Oryza sativa L.) is the main food crop for more than 50% of the world’s population, making it one of the most important crops in the world. The largest yield of rice is obtained from Asia, where about 94% of the world’s supply is grown [1]. To meet the needs of the rapidly growing population, a significant increase in rice production is needed in the coming decades. Rice is attacked by pests, nematodes and pathogens such as viruses, bacteria and fungi [3]. These attacks cause rice diseases and result in significant yield
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
