Development of prediction models for bacterial leaf blight (Xanthomonas aronopodis pv malvacearum) of cotton (Gossypium hirsutum) in Andhra Pradesh and Maharashtra
Indian Agricultural Research Journals
View Archive InfoField | Value | |
Title |
Development of prediction models for bacterial leaf blight (Xanthomonas aronopodis pv malvacearum) of cotton (Gossypium hirsutum) in Andhra Pradesh and Maharashtra
|
|
Creator |
PRASAD, Y G
NAGALAKSHMI, T PRABHAKAR, M REDDY, D YELLA RAO, N H P PRASADA RAO, M P RAO, M SRINIVASA DESAI, S RAO, G G S N RAMAJWSWNA, Y S |
|
Subject |
Bacterial leaf blight; Xanthomonas axonopodis pv malvacearum; Prediction model; Weather;Cotton; Gossypium hirsutum
|
|
Description |
Historical data on bacterial leaf blight disease incidence was analyzed vis-h-vis corresponding weather for identification of conducive weather conditions for disease development at three important cotton-growing locations situated in Andhra Pradesh and Maharashtra. Bacterial leaf blight incidence showed significant negative correlation with minimum temperature at all the three locations. Significant positive correlation was observed with rainfall and number of rainy days at Guntur. Multiple regression analysis between disease incidence (initiation to peak data) and weather variables yielded locationspecific models for disease prediction one week in advance. Co-efficient of determination was lowest (57%) when input weather variables were simple weeMy averages and improved when moving averages were introduced (61%) and was highest (92%) when preceding disease incidence level was included in the model for Guntur. However, simple weekly averages of significant weather variables along with previous week's disease level resulted in equations that explained 78% and 70% variation in disease incidence for Parbhani and Akola, respectively. Validation of the equations with independent data sets led to the identification of the best-fit model for each location based on chi-square test for goodness of fit. The utility of location-specific models is discussed.
|
|
Publisher |
The Indian Journal of Agricultural Sciences
|
|
Contributor |
—
|
|
Date |
2011-01-08
|
|
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/3083
|
|
Source |
The Indian Journal of Agricultural Sciences; Vol 77, No 11 (2007)
0019-5022 |
|
Language |
eng
|
|
Relation |
http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3083/1151
|
|
Rights |
Copyright (c) 2014 The Indian Journal of Agricultural Sciences
|
|