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
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 stu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Uberlândia
2019-10-01
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| Series: | Bioscience Journal |
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| Online Access: | https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42435 |
| _version_ | 1823945265149640704 |
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| author | Anne Pinheiro Costa José Ricardo Peixoto Luiz Eduardo Bassay Blum Michelle Souza Vilela Wagner Vendrame |
| author_facet | Anne Pinheiro Costa José Ricardo Peixoto Luiz Eduardo Bassay Blum Michelle Souza Vilela Wagner Vendrame |
| author_sort | Anne Pinheiro Costa |
| collection | DOAJ |
| description |
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.
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| first_indexed | 2024-12-17T08:20:31Z |
| format | Article |
| id | doaj.art-8af47d28b91642d9b589fca21beca527 |
| institution | Directory Open Access Journal |
| issn | 1981-3163 |
| language | English |
| last_indexed | 2024-12-17T08:20:31Z |
| publishDate | 2019-10-01 |
| publisher | Universidade Federal de Uberlândia |
| record_format | Article |
| series | Bioscience Journal |
| spelling | doaj.art-8af47d28b91642d9b589fca21beca5272022-12-21T21:56:56ZengUniversidade Federal de UberlândiaBioscience Journal1981-31632019-10-01356Development 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 fruitAnne Pinheiro Costa0José Ricardo Peixoto1Luiz Eduardo Bassay Blum2Michelle Souza Vilela3Wagner Vendrame4Universidade de BrasíliaUniversidade de BrasíliaUniversidade de BrasíliaUniversidade de BrasiliaUniversity of Florida 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. https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42435Passiflora edulis SimsXanthomonas axonopodis pv. passifloraephytopathometry |
| spellingShingle | Anne Pinheiro Costa José Ricardo Peixoto Luiz Eduardo Bassay Blum Michelle Souza Vilela Wagner Vendrame 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 Bioscience Journal Passiflora edulis Sims Xanthomonas axonopodis pv. passiflorae phytopathometry |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| topic | Passiflora edulis Sims Xanthomonas axonopodis pv. passiflorae phytopathometry |
| url | https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42435 |
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