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Article

Co-Application of Allicin and Chitosan Increases Resistance of Rosa roxburghii against Powdery Mildew and Enhances Its Yield and Quality

1
College of Forestry, Guizhou University, Guiyang 550025, China
2
Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China
3
Research Center for Fruit Tree Engineering and Technology of Guizhou Province, College of Agriculture, Guizhou University, Guiyang 550025, China
*
Authors to whom correspondence should be addressed.
Jiaohong Li and Rongyu Li contributed equally to this work.
Academic Editor: Helena Felgueiras
Antibiotics 2021, 10(12), 1449; https://doi.org/10.3390/antibiotics10121449 (registering DOI)
Received: 2 November 2021 / Revised: 21 November 2021 / Accepted: 22 November 2021 / Published: 25 November 2021
Powdery mildew, caused by Sphaerotheca sp., annually causes severe losses in yield and quality in Rosa roxburghii production areas of southwest China. In this study, the role of the co-application of allicin and chitosan in the resistance of R. roxburghii against powdery mildew and its effects on growth, yield and quality of R. roxburghii were investigated. The laboratory toxicity test results show that allicin exhibited a superior antifungal activity against Sphaerotheca sp. with EC50 value of 148.65 mg kg−1. In the field, the foliar application of allicin could effectively enhance chitosan against powdery mildew with control efficacy of 85.97% by spraying 5% allicin microemulsion (ME) 100–time liquid + chitosan 100–time liquid, which was significantly (p < 0.01) higher than 76.70% of allicin, 70.93% of chitosan and 60.23% of polyoxin. The co-application of allicin and chitosan effectively enhanced the photosynthetic rate and chlorophyll of R. roxburghii compared with allicin, chitosan or polyoxin alone. Moreover, allicin used together with chitosan was more effective than allicin or chitosan alone in enhancing R. roxburghii plant growth and fruit yield as well as improving R. roxburghii fruit quality. This work highlights that the co-application of allicin and chitosan can be used as a green, cost-effective and environmentally friendly alternative strategy to conventional antibiotics for controlling powdery mildew of R. roxburghii. View Full-Text
Keywords: allicin; chitosan; Sphaerotheca sp.; antibiotic; Rosa roxburghii allicin; chitosan; Sphaerotheca sp.; antibiotic; Rosa roxburghii
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MDPI and ACS Style

Li, J.; Li, R.; Zhang, C.; Guo, Z.; Wu, X.; An, H. Co-Application of Allicin and Chitosan Increases Resistance of Rosa roxburghii against Powdery Mildew and Enhances Its Yield and Quality. Antibiotics 2021, 10, 1449. https://doi.org/10.3390/antibiotics10121449

AMA Style

Li J, Li R, Zhang C, Guo Z, Wu X, An H. Co-Application of Allicin and Chitosan Increases Resistance of Rosa roxburghii against Powdery Mildew and Enhances Its Yield and Quality. Antibiotics. 2021; 10(12):1449. https://doi.org/10.3390/antibiotics10121449

Chicago/Turabian Style

Li, Jiaohong, Rongyu Li, Cheng Zhang, Zhenxiang Guo, Xiaomao Wu, and Huaming An. 2021. "Co-Application of Allicin and Chitosan Increases Resistance of Rosa roxburghii against Powdery Mildew and Enhances Its Yield and Quality" Antibiotics 10, no. 12: 1449. https://doi.org/10.3390/antibiotics10121449

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