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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (11): 2685-2700.doi: 10.16420/j.issn.0513-353x.2023-0766

• Plant Protection • Previous Articles     Next Articles

An Investigation on Occurrence and Distribution Patterns of Five Common Citrus Diseases in Yunnan

NIE Ruihan1, SUN Manli1, FENG Di1, SONG Xietian1, GAO Junyan2, GUO Lina2, DENG Xiuxin1, CHAI Lijun1, XIE Zongzhou1, YE Junli1,*()   

  1. 1 National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops,College of Horticulture & Forestry Sciences,Huazhong Agricultural University,Wuhan 430070,China
    2 Integrated Lemon Experimental and Reseach Station of the Modern Citrus Industrial Technology System in China,Institute of Tropical and Subtropical Cash Crops,Yunnan Academy of Agricultural Sciences,Ruili,Yunnan 678600,China
  • Received:2024-04-19 Revised:2024-07-25 Online:2024-12-12 Published:2024-11-26
  • Contact: YE Junli

Abstract:

To clarify the occurrence and distribution of citrus diseases caused by“Candidatus Liberibacter asiaticus”(CLas),citrus yellow vein clearing virus(CYVCV),citrus tatter leaf virus (CTLV),citrus exocortis viroid(CEVd)and citrus tristeza virus(CTV)in Yunnan Province. In this study,577 citrus leaf samples were collected from 38 counties of 14 major citrus producing states in Yunnan Province. The pathogens of the above five citrus diseases were detected by nested PCR and RT-PCR,phylogenetic tree was constructed by genetic evolution analysis. The analysis showed that the positive rates of CLas,CYVCV,CTLV,CEVd and CTV were 36.0%,33.6%,15.1%,13.0% and 82.0%,respectively. CLas and CTV occurred in all the detected cities. From the citrus species,sweet orange exhibited the highest detection rates of CYVCV,CLas and CTV,followed by mandarin and lemon. Notably,the detection rate of CTV in lemon(40.0%)was obviously lower than that in mandarin(87.4%)and sweet orange(92.2%). While the detection rate of CTLV and CEVd in sweet orange was only 5.9% and 4.0%,respectively,and was lower than mandarin and lemon. Based on the correlation analysis,results revealed a negative correlation between CLas occurence and altitude. It was also found that the correlations of CYVCV and CTV,CTLV and CEVd occurs frequently,whereas the correlation of CLas and CEVd was rarely detected,suggesting correlations among citrus diseases. Through genetic evolution analysis,it was found that the introduction and internal spread of pathogens in Yunnan were both important ways for the spread of the pathogens.

Key words: citrus, Huanglong disease, virus disease, detection, distribution, spread