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Combining biocontrol agents to reduce the variability of biological control
Year:
2001
Source of publication :
Phytopathology
Authors :
Elad, Yigal
;
.
Guetsky, Ruth
;
.
Shtienberg, Dan
;
.
Volume :
91
Co-Authors:
Guetsky, R., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Shtienberg, D., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Elad, Y., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Dinoor, A., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Facilitators :
From page:
621
To page:
627
(
Total pages:
7
)
Abstract:
Two biocontrol agents, a yeast (Pichia guilermondii) and a bacterium (Bacillus mycoides), were tested separately and together for suppression of Botrytis cinerea on strawberry leaves. The aims of the research were to determine whether the use of their combination would broaden the environmental conditions under which biological control is effective, and to test the hypothesis that it would reduce the variability of control efficacy under diverse conditions. Applied separately, the biocontrol agents significantly inhibited spore germination, lesion formation, and lesion development at most temperatures, relative humidities, and spray-timing combinations (temperatures: 10, 15, 20, 23, 25, and 30°C; relative humidities: 78, 85, 96, and 100%; and spray-timings: 0, 4, and 7 days before inoculation). However, control efficacy was highly variable, and under certain combinations it was not adequate. Control efficacy achieved by the biocontrol agents applied separately ranged between 38 and 98% (mean 74%) and the coefficient of variation ranged from 9.7 to 75%. The mixture of Bacillus mycoides and Pichia guilermondii suppressed Botrytis cinerea effectively (80 to 99.8% control) under all conditions, and the coefficients of variation were as low as 0.4 to 9% in all cases. Thus, application of both biocontrol agents resulted in better suppression of Botrytis cinerea, and also reduced the variability of disease control. Application of more than one biocontrol agent is suggested as a reliable means of reducing the variability and increasing the reliability of biological control.
Note:
Related Files :
correlation coefficient
Cryphonectria
Fungal infection
humidity
integrated pest management
Plant Disease
plant disease control
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DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30874
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:57
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Scientific Publication
Combining biocontrol agents to reduce the variability of biological control
91
Guetsky, R., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Shtienberg, D., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Elad, Y., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Dinoor, A., Department of Plant Pathology, Hebrew University of Jerusalem, Faculty of Agricultural Sciences, Rehovot 76100, Israel
Combining biocontrol agents to reduce the variability of biological control
Two biocontrol agents, a yeast (Pichia guilermondii) and a bacterium (Bacillus mycoides), were tested separately and together for suppression of Botrytis cinerea on strawberry leaves. The aims of the research were to determine whether the use of their combination would broaden the environmental conditions under which biological control is effective, and to test the hypothesis that it would reduce the variability of control efficacy under diverse conditions. Applied separately, the biocontrol agents significantly inhibited spore germination, lesion formation, and lesion development at most temperatures, relative humidities, and spray-timing combinations (temperatures: 10, 15, 20, 23, 25, and 30°C; relative humidities: 78, 85, 96, and 100%; and spray-timings: 0, 4, and 7 days before inoculation). However, control efficacy was highly variable, and under certain combinations it was not adequate. Control efficacy achieved by the biocontrol agents applied separately ranged between 38 and 98% (mean 74%) and the coefficient of variation ranged from 9.7 to 75%. The mixture of Bacillus mycoides and Pichia guilermondii suppressed Botrytis cinerea effectively (80 to 99.8% control) under all conditions, and the coefficients of variation were as low as 0.4 to 9% in all cases. Thus, application of both biocontrol agents resulted in better suppression of Botrytis cinerea, and also reduced the variability of disease control. Application of more than one biocontrol agent is suggested as a reliable means of reducing the variability and increasing the reliability of biological control.
Scientific Publication
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