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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)
 
Creator SINGH, J B
SAXENA, PRADEEP
PANDEY, K C
BEHARI, PRADEEP
 
Subject Disease progress; Gloeocercospora sorghi; Gompertz and logistic model; Sorghum temporal development; Zonate leaf spot
 
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.).
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor ICAR
 
Date 2010-06-24
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/68
 
Source The Indian Journal of Agricultural Sciences; Vol 80, No 6 (2010)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/68/68
 
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