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2021 Volume 34 Issue 6
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HU Yue, TIANLichao, TANG Yulan. Study on the Relationship Between Asterococcus muratae Kuwana and Sooty Blotch and Flyspeck of Cinnamomum japonicum Sieb in Chongqing[J]. PLANT HEALTH AND MEDICINE, 2021, (6): 24-27. doi: 10.13718/j.cnki.zwys.2021.06.005
Citation: HU Yue, TIANLichao, TANG Yulan. Study on the Relationship Between Asterococcus muratae Kuwana and Sooty Blotch and Flyspeck of Cinnamomum japonicum Sieb in Chongqing[J]. PLANT HEALTH AND MEDICINE, 2021, (6): 24-27. doi: 10.13718/j.cnki.zwys.2021.06.005
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Study on the Relationship Between Asterococcus muratae Kuwana and Sooty Blotch and Flyspeck of Cinnamomum japonicum Sieb in Chongqing

  • 1. Chongqing Landscape and Gardening Research Institute, Chongqing 401329 China;

  • 2. Chongqing Urban Landscaping Engineering Technology Research Center, Chongqing 401329, China

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  • Received Date: 15/08/2021

  • MSC: S436.8

  • In order to clarify the classification standards of sooty blotch and flyspeck (SBAF) of Cinnamomum japonicum Sieb. in Chongqing, and to study the correlation between SBAF and the occurrence of Asterococcus muratae Kuwana, a classification standard of SBAF is established in this paper with the method of weighing the SBAF layer per leaf area, and Pearson and Spearman correlation analysis is used to study the relationship between the disease index and the occurrence of A. muratae. The results indicate that the weighting method can satisfactorily reflect the severity of SBAF. Correlation studies show that disease index is in a logarithmic relationship with the occurrence of A. murataea, the fitted formula being y=0.090 9 ln(x)+0.241 1 and the coefficient of determination R2 being 0.802 3, thus suggesting that at the initial stage, SBAF will rapidly increase with the occurrence of A. muratae, and when the occurrence of A. muratae reaches a certain level, the growth rate of the disease slows down or stops growing. This result is of great significance for predicting the occurrence of C. japonicum Sieb. SBAF and guiding the front-line prevention and control work.
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Study on the Relationship Between Asterococcus muratae Kuwana and Sooty Blotch and Flyspeck of Cinnamomum japonicum Sieb in Chongqing

  • Received Date: 15/08/2021

Abstract: In order to clarify the classification standards of sooty blotch and flyspeck (SBAF) of Cinnamomum japonicum Sieb. in Chongqing, and to study the correlation between SBAF and the occurrence of Asterococcus muratae Kuwana, a classification standard of SBAF is established in this paper with the method of weighing the SBAF layer per leaf area, and Pearson and Spearman correlation analysis is used to study the relationship between the disease index and the occurrence of A. muratae. The results indicate that the weighting method can satisfactorily reflect the severity of SBAF. Correlation studies show that disease index is in a logarithmic relationship with the occurrence of A. murataea, the fitted formula being y=0.090 9 ln(x)+0.241 1 and the coefficient of determination R2 being 0.802 3, thus suggesting that at the initial stage, SBAF will rapidly increase with the occurrence of A. muratae, and when the occurrence of A. muratae reaches a certain level, the growth rate of the disease slows down or stops growing. This result is of great significance for predicting the occurrence of C. japonicum Sieb. SBAF and guiding the front-line prevention and control work.

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