Temporal Analysis of Bacterial Leaf Blight in Clonal Eucalyptus Plantations in Brazil

Bacterial leaf blight is an important disease in Eucalyptus spp. plantations since it can cause defoliation, affecting plant development. A better understanding of the disease epidemiology is important for its control. Thus, the aim of this study was to analyze bacterial leaf blight temporal progres...

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Bibliographic Details
Published inForests Vol. 10; no. 10; p. 839
Main Authors de Oliveira, Mara Elisa Soares, Silva Fernandes, Fabiano, Glória Junior, Murilo A., Soares de Oliveira, Alvaro, Mafia, Reginaldo Gonçalves, Alves Ferreira, Maria
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.10.2019
Subjects
Air temperature
Atmospheric models
Bacteria
Blight
Cloning
Correlation
Defoliation
Disease
disease progress
disease resistance
Epidemiology
Eucalyptus
eucalyptus wilt disease
Humidity
Leaf blight
Leaves
Meteorological data
Pathogens
Plant diseases
Plantations
Rainfall
Regression analysis
Relative humidity
Software
Brazil
United States > US
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Summary:Bacterial leaf blight is an important disease in Eucalyptus spp. plantations since it can cause defoliation, affecting plant development. A better understanding of the disease epidemiology is important for its control. Thus, the aim of this study was to analyze bacterial leaf blight temporal progress in the initial establishment in the field of different eucalyptus clones. It also targeted to correlate the incidence and area under the disease-progress curve (AUDPC), with variables related to growth and meteorological data. Bacterial leaf blight progress curves were analyzed based on incidence and carried out AUDPC calculation. Pearson’s coefficient was used to verify the correlations between bacterial leaf blight incidence and AUDPC with clone initial growth and meteorological factors. Gompertz or Logistic models were the best adjustment to data, according to the assessed clones. A difference in AUDPC was observed between clones regarding bacterial leaf blight incidence during the assessment period. Clones were divided into three groups with different tolerance levels. A negative correlation was observed between bacterial leaf blight incidence, AUDPC, and growth variables of clones. During the assessment period, average air temperature, rainfall, and air relative humidity favored disease incidence. The clones A469, VM01, and 373 were the most tolerant to the disease.
ISSN:1999-4907
1999-4907
DOI:10.3390/f10100839