Articles
COMBINING SUB-LETHAL HEATING AND CRUCIFEROUS AMENDMENTS FOR IMPROVED CONTROL OF MACROPHOMINA PHASEOLINA
Article number
1044_36
Pages
289 – 293
Language
English
Abstract
Macrophomina phaseolina (Tassi) Goid., causing charcoal rot on many economically valuable crops, is the most destructive soil borne plant pathogen in Indian arid regions.
Combining Brassica amendments like mustard residues or oil cake with one summer irrigation was found effective as an alternative to expensive soil solarization in reducing incidence of Macrophomina induced diseases.
Efficiency of Brassicas was improved when these were incorporated after prolonged exposure of pathogen-infested soil to dry summer heat amounting to sub lethal heating, which exerted a weakening effect.
Mustard oil cake though found more effective than mustard residues could not find acceptance in the resource deficient farming community of the region due to high initial cost.
Large differences in effectiveness between different crucifer species have been found in control of soil borne plant pathogens.
It was, therefore, thought worthwhile to examine whether by supplementing a small dose of other crucifers can improve the efficiency of mustard residues in pathogen control.
This work reports the results of study on interactive effects of sub lethal heating and cruciferous residues on survival of M. phaseolina propagules.
Utilizing a typical hot arid environment, in a field experiment conducted during summer days, combined effect of weakened pathogenic propagules and cruciferous amendments (mustard, cauliflower, Eruca and mustard oil cake) was ascertained in improving the control of M. phaseolina. In this study, improvement in mortality of Macrophomina by 6.9-9.4% was achieved merely by extending summer exposure time of pathogen infested soil from 30 to 60 days to attain discernible weakening effect prior to incorporation of amendments.
Supplementing economic dose of cauliflower residues or mustard oil cake (0.04%) with mustard residues (0.18%) augmented reduction by 10.7-11.6% compared to mustard residues alone after completion of the experiment.
Demonstration of this soil disinfestation strategy at growers field has produced encouraging results.
Combining Brassica amendments like mustard residues or oil cake with one summer irrigation was found effective as an alternative to expensive soil solarization in reducing incidence of Macrophomina induced diseases.
Efficiency of Brassicas was improved when these were incorporated after prolonged exposure of pathogen-infested soil to dry summer heat amounting to sub lethal heating, which exerted a weakening effect.
Mustard oil cake though found more effective than mustard residues could not find acceptance in the resource deficient farming community of the region due to high initial cost.
Large differences in effectiveness between different crucifer species have been found in control of soil borne plant pathogens.
It was, therefore, thought worthwhile to examine whether by supplementing a small dose of other crucifers can improve the efficiency of mustard residues in pathogen control.
This work reports the results of study on interactive effects of sub lethal heating and cruciferous residues on survival of M. phaseolina propagules.
Utilizing a typical hot arid environment, in a field experiment conducted during summer days, combined effect of weakened pathogenic propagules and cruciferous amendments (mustard, cauliflower, Eruca and mustard oil cake) was ascertained in improving the control of M. phaseolina. In this study, improvement in mortality of Macrophomina by 6.9-9.4% was achieved merely by extending summer exposure time of pathogen infested soil from 30 to 60 days to attain discernible weakening effect prior to incorporation of amendments.
Supplementing economic dose of cauliflower residues or mustard oil cake (0.04%) with mustard residues (0.18%) augmented reduction by 10.7-11.6% compared to mustard residues alone after completion of the experiment.
Demonstration of this soil disinfestation strategy at growers field has produced encouraging results.
Publication
Authors
R. Mawar, S. Lodha
Keywords
mustard oil cake, cauliflower residue, Eruca sativa
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