Spatial and temporal analysis of stem bleeding disease in coconut palm in the state of sergipe, Brazil

Carvalho, Rejane Rodrigues da Costa e; Souza, Paulo Estevão de; Warwick, D. R. N.; Pozza, Edson Ampélio; Filho, José Luiz Sandes de Carvalho

doi:10.1590/0001-37652013112412

Cited by 10 publications

(7 citation statements)

References 9 publications

(7 reference statements)

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“…Additionally, the degree of aggregation according to both methods, D and I a , increased over time, showing higher values in the last assessments. Initial infections of stem bleeding disease of coconut palm had a random pattern in the first assessments but evolved to an aggregated pattern in the last [ 39 ].…”

Section: Discussionmentioning

confidence: 99%

Weevil Borers Affect the Spatio-Temporal Dynamics of Banana Fusarium Wilt

Heck

Alves

Mizubuti

2021

JoF

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Dispersal of propagules of a pathogen has remarkable effects on the development of epidemics. Previous studies suggested that insect pests play a role in the development of Fusarium wilt (FW) epidemics in banana fields. We provided complementary evidence for the involvement of two insect pests of banana, the weevil borer (Cosmopolites sordidus L., WB) and the false weevil borer (Metamasius hemipterus L., FWB), in the dispersal of Fusarium oxysporum f. sp. cubense (Foc) using a comparative epidemiology approach under field conditions. Two banana plots located in a field with historical records of FW epidemics were used; one was managed with Beauveria bassiana to reduce the population of weevils, and the other was left without B. bassiana applications. The number of WB and FWB was monitored biweekly and the FW incidence was quantified bimonthly during two years. The population of WB and the incidence (6.7%) of FW in the plot managed with B. bassiana were lower than in the plot left unmanaged (13%). The monomolecular model best fitted the FW disease progress data, and as expected, the average estimated disease progress rate was lower in the plot managed with the entomopathogenic fungus (r = 0.002) compared to the unmanaged plot (r = 0.006). Aggregation of FW was higher in the field with WB management. WB affected the spatial and temporal dynamics of FW epidemics under field conditions. Management of the insects may reduce yield loss due to FW.

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Section: Discussionmentioning

confidence: 99%

Weevil Borers Affect the Spatio-Temporal Dynamics of Banana Fusarium Wilt

Heck

Alves

Mizubuti

2021

JoF

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“…They verified that the plant height and root length of the plants cultured in vitro were significantly smaller in the first one to two years, but there was no significant difference after more than five years (Koffi et al, 2013). Carvalho et al described the spatial distribution of natural infection of coconut resin deposition disease in commercially available orchards and its progression over time (Carvalho et al, 2013). Thomas et al proposed an automatic coconut quality rating method based on sound processing technology, which mainly judges whether the coconut has sufficient water content or is damaged and rotted (Thomas and Anita, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Carvalho et al. described the spatial distribution of natural infection of coconut resin deposition disease in commercially available orchards and its progression over time ( Carvalho et al., 2013 ). Thomas et al.…”

Section: Introductionmentioning

confidence: 99%

A non-destructive coconut fruit and seed traits extraction method based on Micro-CT and deeplabV3+ model

Liu²,

Yang³

et al. 2022

Front. Plant Sci.

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With the completion of the coconut gene map and the gradual improvement of related molecular biology tools, molecular marker-assisted breeding of coconut has become the next focus of coconut breeding, and accurate coconut phenotypic traits measurement will provide technical support for screening and identifying the correspondence between genotype and phenotype. A Micro-CT system was developed to measure coconut fruits and seeds automatically and nondestructively to acquire the 3D model and phenotyping traits. A deeplabv3+ model with an Xception backbone was used to segment the sectional image of coconut fruits and seeds automatically. Compared with the structural-light system measurement, the mean absolute percentage error of the fruit volume and surface area measurements by the Micro-CT system was 1.87% and 2.24%, respectively, and the squares of the correlation coefficients were 0.977 and 0.964, respectively. In addition, compared with the manual measurements, the mean absolute percentage error of the automatic copra weight and total biomass measurements was 8.85% and 25.19%, respectively, and the adjusted squares of the correlation coefficients were 0.922 and 0.721, respectively. The Micro-CT system can nondestructively obtain up to 21 agronomic traits and 57 digital traits precisely.

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“…The ascomycete C. paradoxa not only infects palm trees, such as Cocos nucifera , Phoenix dactylifera , Borassus flabellifer , Butia capitata , Elaeis guineensis , and Areca catechu , but also infects other plants, including Ananas comosus , Mangifera indica , Musa paradisiaca , Solanum muricatum , Theobroma cacao , and Zea mays , resulting in large agricultural losses [3]. The biological characteristics of the pathogen have thus far been described [5], and the partial and temporal dynamics of stem-bleeding have been recorded for clarifying the disease progression and characterizing the production losses from the disease [6]. In addition, some CSB disease management studies have been reported, including physical, chemical, and biological control measures [7,8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Genetic Transformation and Green Fluorescent Protein Labeling in Ceratocystis paradoxa from Coconut

Niu

Pei

Liang

et al. 2019

IJMS

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Ceratocystis paradoxa, the causal agent of stem-bleeding disease of the coconut palm, causes great losses to the global coconut industry. As the mechanism of pathogenicity of C. paradoxa has not been determined, an exogenous gene marker was introduced into the fungus. In this study, pCT74-sGFP, which contains the green fluorescent protein (GFP) gene, and the hygromycin B resistance gene as a selective marker, was used as an expression vector. Several protoplast release buffers were compared to optimize protoplast preparation. The plasmid pCT74-sGFP was successfully transformed into the genome of C. paradoxa, which was verified using polymerase chain reaction and green fluorescence detection. The transformants did not exhibit any obvious differences from the wild-type isolates in terms of growth and morphological characteristics. Pathogenicity tests showed that the transformation process did not alter the virulence of the X-3314 C. paradoxa strain. This is the first report on the polyethylene glycol-mediated transformation of C. paradoxa carrying a ‘reporter’ gene GFP that was stably and efficiently expressed in the transformants. These findings provide a basis for future functional genomics studies of C. paradoxa and offer a novel opportunity to track the infection process of C. paradoxa.

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Spatial and temporal analysis of stem bleeding disease in coconut palm in the state of sergipe, Brazil

Cited by 10 publications

References 9 publications

Weevil Borers Affect the Spatio-Temporal Dynamics of Banana Fusarium Wilt

Weevil Borers Affect the Spatio-Temporal Dynamics of Banana Fusarium Wilt

A non-destructive coconut fruit and seed traits extraction method based on Micro-CT and deeplabV3+ model

Genetic Transformation and Green Fluorescent Protein Labeling in Ceratocystis paradoxa from Coconut

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