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Preventative Approach to Microbial Control of Capnodis tenebrionis by Soil Application of Metarhizium brunneum and Beauveria bassiana
Year:
2020
Source of publication :
Insects (journal)
Authors :
Ment, Dana
;
.
Volume :
11
Co-Authors:

Hysen Kokiçi  - Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti (DiSSPA), Sezione di Entomologia e Zoologia University of Bari "Aldo Moro", I-70126 Bari, Italy. 
Enrico de Lillo  - Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti (DiSSPA), Sezione di Entomologia e Zoologia University of Bari "Aldo Moro", I-70126 Bari, Italy
.

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Management of the Mediterranean flat-headed root-borer, Capnodis tenebrionis, is critical due to the larvae's root localization. Neonate larvae can be exposed to natural enemies before penetrating the roots. Application of Metarhizium brunneum strain Mb7 and Beauveria bassiana strain GHA formulations on rice granules was investigated for their efficacy against C. tenebrionis larvae. Mb7 application, evaluated on apricot twigs, significantly and dose-dependently reduced colonization rates of neonates, with highest mortality at 108 conidia/g soil. Neonate susceptibility to Mb7 and GHA was evaluated on potted rootstocks (GF677 almond × peach, 2729 plum) planted in entomopathogenic fungi (EPF)-premixed soil (1.3-1.6 × 105 conidia/cm3 soil) or in EPF-free soil surface-treated with 5 g Mb7 fungal granules (1.25 × 109 conidia). Larval colonization rates were reduced 7.4-fold in 2729 by both fungi; only Mb7 completely prevented colonization of GF677 by larvae. Larvae inside plant galleries exhibited mycosis with EPF-treated soils and both fungi proliferated on larval frass. Mb7 conidia germinated in the rhizosphere of GF677, and conidia of both fungi remained viable throughout the trial. Galleria baiting technique was used on EPF-treated soil to evaluate EPF infectivity over time; Mb7 and GHA persisted 180 and 90 days post inoculation, respectively. The formulation (fungus-covered rice grains), delivery method (mixing with soil) and persistence (3-6 months) of Mb7 and GHA are feasible for potential field application to control C. tenebrionis.

Note:
Related Files :
Entomopathogenic fungi
fungal efficacy
fungal survival
Mediterranean flat-headed root-borer
microbiological control
Soil applications
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Related Content
More details
DOI :
10.3390/insects11050319
Article number:
0
Affiliations:
Database:
PubMed
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
48019
Last updated date:
02/03/2022 17:27
Creation date:
01/06/2020 16:43
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Scientific Publication
Preventative Approach to Microbial Control of Capnodis tenebrionis by Soil Application of Metarhizium brunneum and Beauveria bassiana
11

Hysen Kokiçi  - Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti (DiSSPA), Sezione di Entomologia e Zoologia University of Bari "Aldo Moro", I-70126 Bari, Italy. 
Enrico de Lillo  - Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti (DiSSPA), Sezione di Entomologia e Zoologia University of Bari "Aldo Moro", I-70126 Bari, Italy
.

Preventative Approach to Microbial Control of Capnodis tenebrionis by Soil Application of Metarhizium brunneum and Beauveria bassiana

Management of the Mediterranean flat-headed root-borer, Capnodis tenebrionis, is critical due to the larvae's root localization. Neonate larvae can be exposed to natural enemies before penetrating the roots. Application of Metarhizium brunneum strain Mb7 and Beauveria bassiana strain GHA formulations on rice granules was investigated for their efficacy against C. tenebrionis larvae. Mb7 application, evaluated on apricot twigs, significantly and dose-dependently reduced colonization rates of neonates, with highest mortality at 108 conidia/g soil. Neonate susceptibility to Mb7 and GHA was evaluated on potted rootstocks (GF677 almond × peach, 2729 plum) planted in entomopathogenic fungi (EPF)-premixed soil (1.3-1.6 × 105 conidia/cm3 soil) or in EPF-free soil surface-treated with 5 g Mb7 fungal granules (1.25 × 109 conidia). Larval colonization rates were reduced 7.4-fold in 2729 by both fungi; only Mb7 completely prevented colonization of GF677 by larvae. Larvae inside plant galleries exhibited mycosis with EPF-treated soils and both fungi proliferated on larval frass. Mb7 conidia germinated in the rhizosphere of GF677, and conidia of both fungi remained viable throughout the trial. Galleria baiting technique was used on EPF-treated soil to evaluate EPF infectivity over time; Mb7 and GHA persisted 180 and 90 days post inoculation, respectively. The formulation (fungus-covered rice grains), delivery method (mixing with soil) and persistence (3-6 months) of Mb7 and GHA are feasible for potential field application to control C. tenebrionis.

Scientific Publication
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