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Improving assessments of anthracnose severity on grapevine leaves through the development of a standard area diagram set

Improving assessments of anthracnose severity on grapevine leaves through the development of a... Anthracnose, caused by Elsinoë ampelina, is an important grapevine disease in humid regions that causes serious crop losses in different parts of the world. The objective of this study was to improve assessments of anthracnose severity on grapevine leaves through the development of a standard area diagram set (SADs). The SADs comprises six true colour diagrams with anthracnose severity ranging from 1.1 to 27.4%. The intermediate values are 2.1, 4.3, 8.3 and 15.6%. To validate the SADs, 12 raters assessed 50 images of grapevine leaves with a range of anthracnose severities. The raters estimated the severity without the use of the SADs, then one week later provided estimates for the same set of images using the SADs as an aid. For all raters, the estimates of grapevine anthracnose severity using the SADs were closer to the actual values than the unaided estimates. Significant improvements in accuracy (coefficient of bias, C b = 0.90 without the SADs and 0.99 with the SADs), precision (Pearson correlation coefficient, r = 0.89 without the SADs and 0.96 with the SADs) and agreement (Lin’s concordance correlation coefficient, ρ c = 0.80 without the SADs and 0.96 with the SADs) were observed. Moreover, the SADs also significantly improved the inter-rater reliability of the estimates (R 2 = 0.70 without the SADs and 0.89 with the SADs). The SADs proposed in this study was proven to be adequate for estimates of anthracnose severity on grapevine leaves. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Plant Pathology Springer Journals

Improving assessments of anthracnose severity on grapevine leaves through the development of a standard area diagram set

Australasian Plant Pathology , Volume 47 (4) – Jun 8, 2018

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References (35)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Australasian Plant Pathology Society Inc.
Subject
Life Sciences; Plant Pathology; Plant Sciences; Agriculture; Entomology; Ecology
ISSN
0815-3191
eISSN
1448-6032
DOI
10.1007/s13313-018-0566-8
Publisher site
See Article on Publisher Site

Abstract

Anthracnose, caused by Elsinoë ampelina, is an important grapevine disease in humid regions that causes serious crop losses in different parts of the world. The objective of this study was to improve assessments of anthracnose severity on grapevine leaves through the development of a standard area diagram set (SADs). The SADs comprises six true colour diagrams with anthracnose severity ranging from 1.1 to 27.4%. The intermediate values are 2.1, 4.3, 8.3 and 15.6%. To validate the SADs, 12 raters assessed 50 images of grapevine leaves with a range of anthracnose severities. The raters estimated the severity without the use of the SADs, then one week later provided estimates for the same set of images using the SADs as an aid. For all raters, the estimates of grapevine anthracnose severity using the SADs were closer to the actual values than the unaided estimates. Significant improvements in accuracy (coefficient of bias, C b = 0.90 without the SADs and 0.99 with the SADs), precision (Pearson correlation coefficient, r = 0.89 without the SADs and 0.96 with the SADs) and agreement (Lin’s concordance correlation coefficient, ρ c = 0.80 without the SADs and 0.96 with the SADs) were observed. Moreover, the SADs also significantly improved the inter-rater reliability of the estimates (R 2 = 0.70 without the SADs and 0.89 with the SADs). The SADs proposed in this study was proven to be adequate for estimates of anthracnose severity on grapevine leaves.

Journal

Australasian Plant PathologySpringer Journals

Published: Jun 8, 2018

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