Escala diagramática para avaliação de severidade de mancha-de-septoria em girassol

Lenz, Giuvan; Costa, Ivan Francisco Dressler da; Balardin, Ricardo Silveiro; Stefanelo, Maurício Silva; Marques, Leandro Nascimento; Arrué, Adriano

doi:10.1590/s0103-84782009000800040

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…SADs have improved the accuracy and precision of estimates of septoriosis severity in some crops, including S. glycines in soybean (Polizel & Juliatti, 2010), S. helianthi in sunflower (Lenz et al, 2009) and S. apicola in mandioquinha-salsa (Mesquini et al, 2009). However, this study is the very first record of a SADs used to estimate the septoriosis severity in sour passion fruit.…”

Section: /9mentioning

confidence: 99%

Standard area diagram set for quantification of septoriosis in fruit of sour passion fruit

Costa¹,

Peixoto²,

Blum³

et al. 2019

Agraria

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A standard area diagram set (SADs) for severity evaluation of septoriosis (Septoria passiflorae) in fruit of sour passion fruit (Passiflora edulis Sims) was developed and validated in this study. The SADs presented eight severity levels (0.3; 0.5; 1; 2; 4; 10; 18; and 30%). For its validation, 20 raters were divided into groups (G1 and G3, inexperienced; G2 and G4, experienced) who initially estimated the disease severity without the aid of the SADs. Subsequently, G1 and G2 performed the second evaluation without the SADs, and G3 and G4 completed the second evaluation with the proposed SADs for each disease. The accuracy and precision of the evaluations were determined by simple linear regression and by Lin's concordance correlation coefficient. The proposed SADs allowed accurate and precise quantification of septoriosis severity, increasing the agreement between estimated and actual values. 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. Lin's concordance correlation coefficient confirmed the increases in accuracy and precision detected by the linear regression analysis.Escala diagramática para a quantificação da severidade da septoriose em frutos do maracujazeiro azedo RESUMO: Uma escala diagramática para a avaliação da severidade da septoriose (Septoria passiflorae) em frutos do maracujazeiro azedo (Passiflora edulis Sims) foi desenvolvida e validada neste estudo. A escala diagramática apresentou oito níveis de severidade (0,3; 0,5; 1; 2; 4; 10; 18; e 30%). Para a sua validação, os 20 avaliadores foram divididos em grupos (G1 e G3, sem experiência; G2 e G4, com experiência), que inicialmente estimaram a severidade da doença sem auxílio da escala. Posteriormente, G1 e G2 fizeram outra avaliação sem escala, e G3 e G4 realizaram a avaliação com a escala proposta. A acurácia e a precisão das estimativas foram determinadas por regressão linear simples e pelo coeficiente de correlação de concordância de Lin. A escala diagramática proposta permitiu quantificar a severidade da septoriose de forma acurada e precisa, aumentando a concordância entre os valores estimados e os reais. O aumento da acurácia e precisão nos grupos que realizaram dupla avaliação sem escala, quando ocorreu, foi mais discreto que os incrementos observados nos grupos que utilizaram a escala. A análise de concordância de Lin confirmou os incrementos da acurácia e precisão detectados pela análise de regressão linear. Palavras-chave: frutos; Passiflora edulis Sims; fitopatometria; Septoria passifloraeStandard area diagram set for quantification of septoriosis in fruit of sour passion fruit Rev. Bras.

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Section: /9mentioning

confidence: 99%

Standard area diagram set for quantification of septoriosis in fruit of sour passion fruit

Costa¹,

Peixoto²,

Blum³

et al. 2019

Agraria

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“…A utilização de escalas diagramáticas pode reduzir a subjetividade das estimativas de severidade entre os avaliadores, melhorando a acurácia e precisão da avaliação (MARTINS et al, 2004;AQUINO et al, 2008;LENZ et al, 2009). No entanto, as escalas têm que ser reproduzíveis e devem apresentar níveis suficientes para caracterização do avanço no progresso da doença (GODOY et al, 2006).…”

Section: Introductionunclassified

Elaboração e validação de escala diagramática para quantificação da mancha de isariopsis da videira

et al. 2009

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“…To be used in the evaluation of cultivars resistant and/or tolerant to many diseases, diagrammatic scales reduce the subjectivity of estimates and provide more precise information about pathosystems, provide a standardized assessment of severity, thus allowing comparing results between different institutions and locations (LENZ et al, 2009). Studies have been conducted to determine the epidemiology and assess the severity of diseases in several economically important crops such as sunflower (LENZ et al, 2009), citrus (SILVA et al, 2009), apple (BOGO et al, 2010, tomato (FIORINI et al, 2010) and coffee (PAIVA et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Studies have been conducted to determine the epidemiology and assess the severity of diseases in several economically important crops such as sunflower (LENZ et al, 2009), citrus (SILVA et al, 2009), apple (BOGO et al, 2010, tomato (FIORINI et al, 2010) and coffee (PAIVA et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Response of banana genotypes to yellow Sigatoka in coastal tablelands of Sergipe, Brazil

Quirino¹,

Lédo²,

Talamini³

et al. 2014

Rev. Ciênc. Agron.

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-Brazil has low availability of productive commercial cultivars with appropriate size and resistance to yellow Sigatoka. The objective of this study was to evaluate the behavior of different banana genotypes against yellow Sigatoka at conditions of Coastal Tablelands of Sergipe. The experiment was conducted at the Experimental Field of Embrapa Tabuleiros Costeiros, municipality of Nossa Senhora das Dores. The experimental design was randomized blocks design with 22 genotypes and three replications, six plants per plot. The genotypes tested were: Enxerto-33, Japira-106, FHIA-23, YB42-17, YB42-47, FHIA-18, PA42-44, PA94-01, PV79-34, Pacovan Ken, Pacovan, Prata-Anã, Maravilha, Garantida, Princesa, Tropical, Maçã, Grande Naine, FHIA-02, Caipira, Bucaneiro and Thap Maeo. The severity of yellow Sigatoka was evaluated at 60, 270 and 420 days after planting (DAP) (from July/2009 to July/2010), using a descriptive scale of Stover. Then, the infection rate was calculated at 60, 270 and 420 DAP, and was compared by Scott-Knott test at 5%. It was observed that genotypes have the same behavior at 270 DAP. At 60 DAP, genotypes with lower infection rate were Bucaneiro, Enxerto-33, Japira-106, YB42-17, FHIA-02, FHIA-18, FHIA-23, PA42-44, PA94-01, Caipira, Maçã, PrataAnã and Thap Maeo. At 420 DAP, the lowest rates were obtained for genotypes YB42-17, FHIA-23, Princesa, YB42-47, Tropical, Grand Naine, Caipira, Maçã, Garantida, Bucaneiro, Pacovan Ken and Thap Maeo.

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Escala diagramática para avaliação de severidade de mancha-de-septoria em girassol

Abstract: A falta de um método-padrão de quantificação visual para doenças foliares pode levar a estimativas imprecisas da severidade dessas doenças, induzindo os avaliadores a conclusões erradas. O objetivo deste trabalho foi desenvolver

Cited by 6 publications

References 4 publications

Standard area diagram set for quantification of septoriosis in fruit of sour passion fruit

Standard area diagram set for quantification of septoriosis in fruit of sour passion fruit

Elaboração e validação de escala diagramática para quantificação da mancha de isariopsis da videira

Response of banana genotypes to yellow Sigatoka in coastal tablelands of Sergipe, Brazil

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