Comparing models for temporal progress of zonate leaf spot (Gloeocercospora sorghi) disease in sorghum (Sorghum bicolor)
Indian Agricultural Research Journals
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Title |
Comparing models for temporal progress of zonate leaf spot (Gloeocercospora sorghi) disease in sorghum (Sorghum bicolor)
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Creator |
SINGH, J B
SAXENA, PRADEEP PANDEY, K C BEHARI, PRADEEP |
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Subject |
Disease progress; Gloeocercospora sorghi; Gompertz and logistic model; Sorghum temporal development; Zonate leaf spot
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Description |
Field studies were conducted during 2004–06 rainy (kharif) seasons to analyze the temporal progress of zonate leaf spot (Gloecercospora sorghi. Bain & Edgerton) . Two growth models (Gompertz & logistic) were used to fit empirically derived disease progress curves. The Gompertz transformation effectively linearized the disease progress for all the 3 seasons. A close agreement was observed between the predicted and observed disease level in case of Gompertz model which accounted for > 90% of disease severity (P < 0.01) along with low root mean square error (0.053 to 0.061) as compared to logistic model (R*2 > 80%, RMSE* =0.063 to 0.105) over the years. The Gompertz model was found to be best fit over the years for describing zonate leaf spot disease progression in a natural inoculum population of G. sorghi on sorghum (Sorghum bicolor L.).
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Publisher |
The Indian Journal of Agricultural Sciences
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Contributor |
ICAR
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Date |
2010-06-24
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Type |
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
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Format |
application/pdf
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Identifier |
http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/68
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Source |
The Indian Journal of Agricultural Sciences; Vol 80, No 6 (2010)
0019-5022 |
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Language |
eng
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Relation |
http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/68/68
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Rights |
Copyright (c) 2014 The Indian Journal of Agricultural Sciences
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