scholarly journals Standard area diagram set for bacterial spot assessment in fruits of yellow passion fruit

2018 ◽  
Vol 40 (6) ◽  
Author(s):  
Anne Pinheiro Costa ◽  
Márcio de Carvalho Pires ◽  
José Ricardo Peixoto ◽  
Luiz Eduardo Bassay Blum ◽  
Fábio Gelape Faleiro
Keyword(s):  
Systematic Errors ◽  
Passion Fruit ◽  
Coefficient Of Determination ◽  
Concordance Correlation Coefficient ◽  
Simple Linear Regression ◽  
Concordance Correlation ◽  
Bacterial Spot ◽  
Passiflora Edulis ◽  
Accuracy And Precision ◽  
Yellow Passion Fruit

Abstract This study developed and validated a standard area diagram set (SADs) for severity assessment of bacterial spot (Xanthomonas axonopodis pv. ) in passifloraefruits of yellow passion fruit (Passiflora edulis). The SADs consisted of eight severity levels (1%; 3%; 5%; 10%; 21%; 38%; 65%; and 80%). For its validation, 20 raters, who initially estimated the disease severity without the aid of the SADs, were divided into groups (G1 and G3, inexperienced; G2 and G4, experienced). Subsequently, G1 and G2 performed the second evaluation without the proposed SADs, and G3 and G4 completed the second evaluation using the proposed SADs. The accuracy and precision of the assessments were determined by simple linear regression and by the Lin’s concordance correlation coefficient. The increase in the accuracy was confirmed by the reduction in the constant and systematic errors, indicating that the estimated severities were close to the actual values when the SADs was used. Inexperienced raters benefited the most from the use of the SADs, and 60% and 100% of them presented constant and systematic error-free estimates, respectively. Precision increased with the increase in the coefficient of determination, the reduction in absolute errors, and the increase in the reproducibility of the estimates between pairs of raters.

scholarly journals Standard Area Diagram Set for Scab Evaluation in Fruits of sour Passion Fruit

2019 ◽  
Vol 11 (14) ◽  
pp. 298 ◽  
Author(s):  
Anne Pinheiro Costa ◽  
José Ricardo Peixoto ◽  
Luiz Eduardo Bassay Blum ◽  
Márcio de Carvalho Pires
Keyword(s):  
Absolute Error ◽  
Passion Fruit ◽  
Coefficient Of Determination ◽  
Concordance Correlation Coefficient ◽  
Simple Linear Regression ◽  
Concordance Correlation ◽  
Passiflora Edulis ◽  
Accuracy And Precision ◽  
Variation Range ◽  
Sour Passion Fruit

Scab (Cladosporium spp.) significantly comprises the commercial acceptance of sour passion fruit (Passiflora edulis) because of the deformed and atrophied fruit appearance resulting from the development of the lesions. Therefore, the objective of this study was to elaborate and validate a standard area diagram set (SADs) for the severity evaluation of scab in fruits of sour passion fruit. The SADs comprised eight severity levels (0.6; 1; 2; 4; 8; 16; 37; and 46%) and was validated by 20 raters (G1 and G3, inexperienced; G2 and G4, experienced). Initially, all raters performed a non-aided SADs evaluation of the scab severity. Afterward, G1 and G2 completed the second evaluation without the proposed SADs, whereas G3 and G4 performed a SADs-aided assessment of the disease severity. The accuracy and precision of the evaluations were determined by simple linear regression and by the Lin’s concordance correlation coefficient. Constant and systematic errors decreased with the use of the SADs, demonstrating an approximation between the estimated and the actual values. Precision increased with an increase in the coefficient of determination. Also, the absolute error reduced by 66% (G3) and 47% (G4). Therefore, 94.4% (G3) and 98.8% (G4) of the estimates had up to ±10% of errors, which corresponds to a 20.4% (G3) and 5.6% (G4) increment in the estimates with errors within this variation range. As a result, accuracy and precision were higher in the SADs-aided groups. Inexperienced raters were the most benefited by the use of the SADs. The accuracy and precision of the non-aided groups had a slight or no increase when compared with the SADs-aided groups.

scholarly journals Standard area diagram set for scab quantification in trilobed leaves of the sour passion fruit

2020 ◽  
Vol 50 (3) ◽  
Author(s):  
Anne Pinheiro Costa ◽  
José Ricardo Peixoto ◽  
Luiz Eduardo Bassay Blum ◽  
Alexandre Bosco de Oliveira
Keyword(s):  
Correlation Coefficient ◽  
Bias Correction ◽  
Systematic Errors ◽  
Passion Fruit ◽  
Coefficient Of Determination ◽  
Concordance Correlation Coefficient ◽  
Concordance Correlation ◽  
Improve Accuracy ◽  
Severity Levels ◽  
Sour Passion Fruit

ABSTRACT: The study aimed to develop and validate a standard area diagram set (SADs) to improve accuracy, precision, and reproducibility in the assessment of scab severity in trilobed leaves of the sour passion fruit. The SADs comprised six severity levels (1%; 3%; 6%; 11%; 21%; and 33%). The SADs increased the accuracy of the estimates by reducing the constant and systematic errors, and the tendency to overestimate the actual severity, limited the number of evaluators who presented this trend, in addition to increasing the bias correction factor. The inexperienced evaluators were the ones that benefited the most from the SADs use. Once the SADs was introduced, 80% and 100% evaluators gave estimates free from constant and systematic errors, respectively. The improvement in precision was verified by the increase in the coefficient of determination and Lin’s concordance correlation coefficient, by reducing absolute errors and increasing the reproducibility of the estimates.

scholarly journals Development and validation of a standard area diagram set as assessment aid for estimating the severity of bacterial spot on tri-lobed leaves of yellow passion fruit

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
Anne Pinheiro Costa ◽  
José Ricardo Peixoto ◽  
Luiz Eduardo Bassay Blum ◽  
Michelle Souza Vilela ◽  
Wagner Vendrame
Keyword(s):  
Linear Regression ◽  
Linear Regression Analysis ◽  
Passion Fruit ◽  
Bacterial Spot ◽  
Passiflora Edulis ◽  
Accuracy And Precision ◽  
Precise Quantification ◽  
Increase In Accuracy ◽  
Development And Validation ◽  
Yellow Passion Fruit

Bacterial spot (Xanthomonas axonopodis pv. passiflorae) significantly reduces yellow passion fruit (Passiflora edulis Sims) yield and longevity. A standard area diagram set (SADs) for severity assessment of bacterial spot on tri-lobed leaves of yellow passion was developed and validated in this study. The SADs consisted of eight severity levels (2; 4; 9; 18; 35; 58; 80; and 94%). For its validation, 20 raters, who initially estimated the disease severity without the aid of the SADs, were divided into four groups (G1 and G3, inexperienced; G2 and G4, experienced). Subsequently, G1 and G2 performed the second evaluation without the SADs, and G3 and G4 completed the second evaluation with the proposed SADs. The accuracy and precision of the assessments were determined by simple linear regression and by the Lin’s concordance correlation coefficient (LCCC). The proposed SADs allowed accurate and precise quantification of bacterial spot severity, increasing the agreement between estimated and actual values. Inexperienced raters benefited the most from the use of the SADs. The increase in accuracy and precision in the non-aided groups, when present, was less pronounced than those increments observed in the SADs-aided groups. The LCCC confirmed the increases in accuracy and precision detected by the linear regression analysis.

scholarly journals Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

2019 ◽  
Vol 11 (9) ◽  
pp. 30 ◽  
Author(s):  
Anne Pinheiro Costa ◽  
José Ricardo Peixoto ◽  
Luiz Eduardo Bassay Blum ◽  
Alexandre Bosco de Oliveira ◽  
Ana Paula Gomes de Castro ◽  
...  
Keyword(s):  
Linear Regression ◽  
Correlation Coefficient ◽  
Disease Severity ◽  
Linear Regression Analysis ◽  
Passion Fruit ◽  
Concordance Correlation Coefficient ◽  
Concordance Correlation ◽  
Bacterial Spot ◽  
Accuracy And Precision ◽  
Sour Passion Fruit

This study developed and validated a standard area diagram set (SADs) to aid in the estimation of bacterial spot (Xanthomonas axonopodis pv. passiflorae) severity in entire-margined leaves of sour passion fruit (Passiflora edulis Sims). The SADs consisted of eight severity levels (3; 6; 12; 25; 50; 77, and 88%). For its validation, 20 raters, who initially estimated the disease severity without the aid of the SADs, were divided into groups (G1 and G3, inexperienced; G2 and G4, experienced). Subsequently, G1 and G2 performed the second evaluation without the SADs, and G3 and G4 completed the second evaluation using the proposed SADs. The accuracy and precision of the assessments were determined by simple linear regression and by the Lin’s concordance correlation coefficient. The increase in accuracy was confirmed by the 80% constant error-free estimates (G3 and G4) and 100% (G3) and 80% (G4) systematic error-free estimates when the SADs was used. Precision increased with the increase in the coefficient of determination, the reduction in absolute errors, and the increase in the reproducibility of the estimates between pairs of raters. Inexperienced raters benefited the most from the use of the SADs. The increase in the accuracy and precision in the non-aided groups, when present, was less pronounced than those increments observed in the SADs-aided groups. The Lin’s concordance correlation coefficient confirmed the increased accuracy and precision detected by the linear regression analysis and indicated increased agreement between the estimated and actual values of disease severity in the SADs-aided groups.

scholarly journals Development and validation of a standard area diagram set to evaluate bacterial blight on yellow passion fruit leaves

2018 ◽  
Vol 44 (4) ◽  
pp. 332-337 ◽  
Author(s):  
Rodrigo Martins Monzani ◽  
Grazieli Araldi da Silva ◽  
Forrest Nutter Junior ◽  
Henrique da Silva Silveira Duarte ◽  
Louise Larissa May De Mio
Keyword(s):  
Correlation Coefficient ◽  
Bacterial Blight ◽  
Passion Fruit ◽  
Coefficient Of Determination ◽  
Concordance Correlation ◽  
Intra Class Correlation ◽  
Accuracy And Precision ◽  
Development And Validation ◽  
Improved Accuracy ◽  
Yellow Passion Fruit

ABSTRACT Bacterial blight is one of the most important diseases of yellow passion fruit. The aim of this study was to develop and validate a set of standard area diagram (SADs) to improve the accuracy and precision of bacterial blight severity assessments on yellow passion fruit leaves. The proposed SADs, composed of illustrations of symptomatic leaves with nine severity levels (1, 2.5, 5, 10, 20, 30, 40, 50 and 62%), were evaluated by 15 raters. Accuracy, precision and reliability of the SADs were validated by quantifying and comparing the assessments performed by 15 raters with and without the use of SADs. The SADs improved accuracy (coefficient of bias, Cb = 0.940 without SADs and 0.967 with SADs), precision (correlation coefficient, r = 0.901 without SADs and 0.949 with SADs) and overall agreement (Lin’s concordance correlation coefficient, ρc = 0.863 without SADs and 0.935 with SADs) of severity estimates. Inter-rater reliability also significantly improved when the SADs were used (coefficient of determination, R2 = 0.717 without and R2 = 0.880 with the SADs; intra-class correlation, ρ = 0.798 without and ρ = 0.926 with the SADs). The developed SADs improved accuracy, precision and reliability of disease severity assessments and are recommended as an aid to assess bacterial blight on yellow passion fruit leaves.

scholarly journals DEMANDA HÍDRICA DO MARACUJAZEIRO AMARELO (Passiflora edulis Sims f. flavicarpa Deg.)

Irriga ◽  
2002 ◽  
Vol 7 (3) ◽  
pp. 185-190
Author(s):  
Ana Alexandrina Gama da Silva ◽  
Antonio Evaldo Klar
Keyword(s):  
Water Demand ◽  
Crop Coefficient ◽  
Passion Fruit ◽  
Crop Water ◽  
Passiflora Edulis ◽  
Crop Water Demand ◽  
Passiflora Edulis Sims ◽  
E Mail ◽  
Fruit Formation ◽  
Yellow Passion Fruit

DEMANDA HÍDRICA DO MARACUJAZEIRO AMARELO (Passiflora edulis Sims f. flavicarpa Deg.)   Ana Alexandrina Gama da SilvaEmbrapa Tabuleiros Costeiros, CP 44, CEP 49025-040, Aracaju, SE. E-mail: [email protected] Evaldo KlarDepartamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, CP 237, CEP 18603-970, Botucatu, SP. E-mail: [email protected] Científico do CNPq   1 RESUMO  Determinou-se à demanda hídrica e o coeficiente de cultivo (Kc) do maracujá amarelo (Passiflora edulis Sims f. flavicarpa Deg.), seleção Sul-Brasil, cultivado sob irrigação localizada, no município de Botucatu-SP (22o 51’ S,  48o 26’ W). A evapotranspiração máxima da cultura (ETc) e a evapotranspiração de referência (ETo) foram medidas em lisímetros de nível de lençol freático constante, durante o período de 29 de setembro de 2000 a 20 de julho de 2001. Os valores da ETc e ETo foram de 954,98 mm e  1.069,21 mm, respectivamente, durante todo o período medido. Os valores de Kc variaram de 0,42 a 1,12, com os valores máximos registrados entre 150 e 210 dias após o transplantio das mudas no campo (DAT), período correspondente aos estádios fenológicos de florescimento e formação dos frutos.  UNITERMOS: Passiflora edulis, evapotranspiração, coeficiente de cultivo (Kc).   SILVA, A.A.G. da, KLAR, A.E.  YELLOW PASSION FRUIT (Passiflora edulis Sims f. flavicarpa Deg.) CROP: WATER DEMAND.   2 ABSTRACT  Crop water demand and crop water coefficient (Kc = ETc/ETo) of yellow passion fruit were evaluated in constant level lysimeters under drip irrigation from September 21, 2000 to July 31, 2001 in Botucatu-SP. The maximum crop water demand (ETc) and the Reference Evapotranspiration (ETo), measured by lysimeters, were 954.98 mm and 1,069.21 mm, respectively, during all period measured. The values of Kc varied from 0.42 to 1.12  with maximum values registered from 150 to 210 days following transplanting during flowering and fruit formation  phases.  KEYWORDS: Passiflora edulis, evapotranspiration, crop coefficient (Kc). 

scholarly journals PRODUÇÃO DE MARACUJAZEIRO AMARELO NO SOLO COM CALCÁRIO E POTÁSSIO SOB IRRIGAÇÃO COM ÁGUA SALINA

Irriga ◽  
2018 ◽  
Vol 23 (4) ◽  
pp. 727-740 ◽  
Author(s):  
Lourival Ferreira Cavalcante ◽  
Clodoaldo Júnior Oliveira Santos ◽  
José Simplício de Holanda ◽  
Antonio João de Lima Neto ◽  
Antônio Gustavo de Luna Souto ◽  
...  
Keyword(s):  
Rainy Season ◽  
Saline Water ◽  
Rio Grande ◽  
Dry Season ◽  
Passion Fruit ◽  
Passiflora Edulis ◽  
Salt Leaching ◽  
Fruit Plants ◽  
E Mail ◽  
Yellow Passion Fruit

PRODUÇÃO DE MARACUJAZEIRO AMARELO NO SOLO COM CALCÁRIO E POTÁSSIO SOB IRRIGAÇÃO COM ÁGUA SALINA     LOURIVAL FERREIRA CAVALCANTE1; CLODOALDO JÚNIOR OLIVEIRA SANTOS1; JOSÉ SIMPLÍCIO DE HOLANDA2; ANTONIO JOÃO DE LIMA NETO3; ANTÔNIO GUSTAVO DE LUNA SOUTO4 E TONY ANDRESON GUEDES DANTAS5     1 Universidade Federal da Paraíba, Departamento de Solos e Engenharia Rural, Rodovia BR 079 - Km 12, 58.397-000, Areia, PB, Brasil. E-mail: [email protected]; [email protected]  2 Empresa de Pesquisa Agropecuária do Rio Grande do Norte, Av. Eliza Branco Pereira dos Santos, s/nº, Parque das Nações, 59.158-160, Parnamirim, RN, Brasil. E-mail: [email protected] 3 Universidade Federal do Ceará, Departamento de Fitotecnia, Campus do Pici, Av. Mister Hull, 2977, Bloco 805, 60.356-001, Fortaleza, CE, Brasil. E-mail: [email protected] 4 Universidade Federal da Paraíba, Departamento de Fitotecnia e Ciências Ambientais, Rodovia BR 079 - Km 12, 58.397-000, Areia, PB, Brasil. E-mail: [email protected] 5 Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Rodovia CE-187, s/n, Aeroporto, 62.320-000, Tianguá, CE, Brasil. E-mail: [email protected]     1 RESUMO   O experimento foi conduzido no município de Coronel Ezequiel, Rio Grande do Norte, para avaliar os efeitos do calcário calcítico e doses de K2O, na forma de cloreto de potássio, nos componentes de produção do maracujazeiro amarelo e no aumento da salinidade do solo provocado pela irrigação com água salina de 3,6 dS m-1 durante o período da aridez e na lixiviação dos sais do ambiente radicular das plantas promovida pelas águas do período chuvoso. Os tratamentos foram dispostos em delineamento em blocos casualizados usando arranjo fatorial 3 × 2, referente as doses de calcário de 1,4; 2,5 e 3,6 t ha-1, 80 e 160 kg ha-1 de K2O na forma de cloreto de potássio. Pelos resultados, a irrigação com água salina (3,6 dS m-1), em comparação com dados da literatura de plantas irrigadas com água de boa qualidade, não comprometeu a capacidade produtiva do maracujazeiro amarelo. Dentre os tratamentos, a combinação de 80 kg ha-1 de K2O com 3,6 t ha-1 de calcário calcítico proporcionou os maiores valores de massa média dos frutos, produção por planta e produtividade da cultura. Apesar da alta salinidade da água de irrigação elevar o caráter salino do solo no ambiente radicular das plantas durante o período da estiagem, as águas do período chuvoso e as condições físicas do solo proporcionam a lixiviação dos sais e possibilitam o uso de água com restrições salinas na agricultura.   Palavras-chave: Passiflora edulis, calagem, lixiviação de sais     CAVALCANTE, L. F.; SANTOS, C. J. O.; HOLANDA, J. S.; LIMA NETO, A. J.; SOUTO, A. G. L.; DANTAS, T. A. G. YELLOW PASSION FRUIT PLANTS PRODUCTION ON SOIL WITH LIME AND POTASSIUM UNDER IRRIGATION WITH SALINE WATER       2 ABSTRACT   The experiment was carried out in Coronel Ezequiel county, Rio Grande do Norte, Brazil, in order to evaluate the effects of limestone and chloride potassium in production components of yellow passion fruit plants and soil salinity, caused by irrigation with saline water of 3.6 dS m-1 during the dry season, and salt leaching of the soil promoted by waters of the rainy season. Treatments were arranged in randomized blocks using factorial design of 3 × 2, referring to three levels of limestone,  1.4, 2.5 and 3.6 t ha-1 and two potassium levels,  80 and 160 kg ha-1 in potassium chloride form. According to present results, irrigation with saline water (3.6 dS m-1), in comparison with data from the literature about plants irrigated with non-saline water, did no compromise the productive capacity of yellow passion fruit. Among the treatments, the combination of 80 kg ha-1 of K2O with 3.6 t ha-1 of limestone provided the fruits production with more mean mass, yield per plant and crop yield. Although the high salinity of the irrigation water increases the soil saline character on root environment of the plants during the dry season, the rainy season waters and the soil physical conditions provide the salt leaching and allow the use of water with saline restrictions in agriculture.   Keywords: Passiflora edulis, liming, salt lixiviation

scholarly journals Assessment of resistance of hybrids and lineages of passion fruit to bacteriosis under protected cultivation

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Janlylle Ruama Yankovich Arrifano ◽  
José Ricardo Peixoto ◽  
Michelle Souza Vilela ◽  
Solange da Costa Nogueira ◽  
Thiago Campos De Oliveira ◽  
...  
Keyword(s):  
Genetic Resistance ◽  
Passion Fruit ◽  
Bacterial Spot ◽  
Xanthomonas Axonopodis ◽  
Affected Area ◽  
Injured Area ◽  
Protected Cultivation ◽  
Diagrammatic Scale ◽  
Yellow Passion Fruit ◽  
Sour Passion Fruit

Yield and longevity of yellow passion fruit have been reduced by diseases such as the bacterial spot caused by Xanthomonas axonopodis pv. passiflorae. Genetic resistance has been confirmed as the most efficient and economical correct option to minimize this disease problem. Aiming at it, the objective of this research was to evaluate the incidence, severity and progression of the disease in 12 genotypes of sour passion fruit, in seedling stage in nursery greenhouse after inoculation of Xanthomonas axonopodis pv. passiflorae. The inoculation was performed with an isolate collected in the Pipiripau Rural Nucleus, Brasilia-DF, named UnB-1397 (1x106 CFU/mL), through induction of injuries. There were performed four assessments, with interval of 7 days except the first which was performed 11 days after inoculation. The incidence was estimated by the percentage of plants affected. To evaluate the severity, it was used the diagrammatic scale validated by Costa et al. (2018), with adaptations, using the measurement of the affected area by necrotic lesions on the leaf. All genotypes were susceptible to bacteriosis, 5 being considered moderately susceptible: F1 BRS Pérola do Cerrado x Rosa Intenso, Mar20#21, Mar20#15b, Mar20#24xMar20#40 and FB200PL4R2 x Mar20#2005, with a mean of severity ranging from 11 to 25% of injured area in leaves.  

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