Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field
Abstract Background Among all the coconut pests, rhinoceros beetle causes acute and serious damage to coconut palm. Management of this pest is very difficult due to its nocturnal activity, and also, it damages the emerging leaf inside the bud. Management of rhinoceros beetle using entomopathogens wi...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-07-01
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| Series: | Egyptian Journal of Biological Pest Control |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s41938-023-00715-x |
| _version_ | 1827899694729134080 |
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| author | C. Manjunatha V. Velavan R. Rangeshwaran M. Mohan A. Kandan G. Sivakumar A. N. Shylesha M. K. Prasanna Kumar D. Pramesh M. Sujithra H. K. Ranganath S. N. Sushil |
| author_facet | C. Manjunatha V. Velavan R. Rangeshwaran M. Mohan A. Kandan G. Sivakumar A. N. Shylesha M. K. Prasanna Kumar D. Pramesh M. Sujithra H. K. Ranganath S. N. Sushil |
| author_sort | C. Manjunatha |
| collection | DOAJ |
| description | Abstract Background Among all the coconut pests, rhinoceros beetle causes acute and serious damage to coconut palm. Management of this pest is very difficult due to its nocturnal activity, and also, it damages the emerging leaf inside the bud. Management of rhinoceros beetle using entomopathogens will be of great importance as it is economical and ecofriendly. Studies were carried out to decipher the biocontrol potential of indigenous entomopathogenic bacterium (Bacillus thuringiensis) and entomopathogenic fungi (Metarhizium robertsii and M. majus) against Oryctes rhinoceros in the field, individually as well as in combination, by soil drench as well as by topical spray method. Results The study showed that B. thuringiensis strain NBAIR-BTAN4 showed 24.8% mortality at 5th week in soil drench method and 24% mortality in topical spray method. M. robertsii showed 24% mortality at 5th week in soil drench method as well as topical spray method. Similarly, M. majus showed 24% mortality in soil drench method and 23.2% in topical spray method at 5th week. In combination, NBAIR-BTAN4 + M. robertsii showed 40.8 and 44% in soil drench and topical spray method at 5th week, respectively. Combination of NBAIR-BTAN4 + M. majus showed 44.8 and 40.8% in soil drench and topical spray method at 5th week, respectively. Combination of NBAIR-BTAN4 + M. robertsii + M. majus showed 52.8 and 57.6% mortality at 5th week in soil drench and topical spray method, respectively. Conclusion The present study showed application B. thuringiensis in combination with M. robertsii and M. majus is effective in management rhinoceros beetle in coconut orchard. Study also indicated that soil drench method is more promising strategy than topical spray method in managing larval population of the beetles and also confirmed that B. thuringiensis, M. robertsii and M. majus are compatible and they seemed to have a synergistic effect in controlling the pest in coconut orchard. |
| first_indexed | 2024-03-12T23:21:20Z |
| format | Article |
| id | doaj.art-65418a2d8ba44109aa3986bbfd61c19e |
| institution | Directory Open Access Journal |
| issn | 2536-9342 |
| language | English |
| last_indexed | 2024-03-12T23:21:20Z |
| publishDate | 2023-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Egyptian Journal of Biological Pest Control |
| spelling | doaj.art-65418a2d8ba44109aa3986bbfd61c19e2023-07-16T11:27:25ZengSpringerOpenEgyptian Journal of Biological Pest Control2536-93422023-07-013311610.1186/s41938-023-00715-xAssessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in fieldC. Manjunatha0V. Velavan1R. Rangeshwaran2M. Mohan3A. Kandan4G. Sivakumar5A. N. Shylesha6M. K. Prasanna Kumar7D. Pramesh8M. Sujithra9H. K. Ranganath10S. N. Sushil11ICAR-National Bureau of Agricultural Insect ResourcesDepartment of Biotechnology, Bharathiar UniversityICAR-National Bureau of Agricultural Insect ResourcesICAR-National Bureau of Agricultural Insect ResourcesICAR-National Bureau of Agricultural Insect ResourcesICAR-National Bureau of Agricultural Insect ResourcesICAR-National Bureau of Agricultural Insect ResourcesDepartment of Plant Pathology, University of Agricultural Sciences, GKVKAgricultural Research Station, Gangavathi, University of Agricultural SciencesICAR-Central Plantation Crop Research InstituteCollege of Agriculture Hassan, University of Agricultural Sciences, GKVKICAR-National Bureau of Agricultural Insect ResourcesAbstract Background Among all the coconut pests, rhinoceros beetle causes acute and serious damage to coconut palm. Management of this pest is very difficult due to its nocturnal activity, and also, it damages the emerging leaf inside the bud. Management of rhinoceros beetle using entomopathogens will be of great importance as it is economical and ecofriendly. Studies were carried out to decipher the biocontrol potential of indigenous entomopathogenic bacterium (Bacillus thuringiensis) and entomopathogenic fungi (Metarhizium robertsii and M. majus) against Oryctes rhinoceros in the field, individually as well as in combination, by soil drench as well as by topical spray method. Results The study showed that B. thuringiensis strain NBAIR-BTAN4 showed 24.8% mortality at 5th week in soil drench method and 24% mortality in topical spray method. M. robertsii showed 24% mortality at 5th week in soil drench method as well as topical spray method. Similarly, M. majus showed 24% mortality in soil drench method and 23.2% in topical spray method at 5th week. In combination, NBAIR-BTAN4 + M. robertsii showed 40.8 and 44% in soil drench and topical spray method at 5th week, respectively. Combination of NBAIR-BTAN4 + M. majus showed 44.8 and 40.8% in soil drench and topical spray method at 5th week, respectively. Combination of NBAIR-BTAN4 + M. robertsii + M. majus showed 52.8 and 57.6% mortality at 5th week in soil drench and topical spray method, respectively. Conclusion The present study showed application B. thuringiensis in combination with M. robertsii and M. majus is effective in management rhinoceros beetle in coconut orchard. Study also indicated that soil drench method is more promising strategy than topical spray method in managing larval population of the beetles and also confirmed that B. thuringiensis, M. robertsii and M. majus are compatible and they seemed to have a synergistic effect in controlling the pest in coconut orchard.https://doi.org/10.1186/s41938-023-00715-xCoconutBiocontrolEntomopathogenic fungiEntomopathogenic bacteriaBiopesticides |
| spellingShingle | C. Manjunatha V. Velavan R. Rangeshwaran M. Mohan A. Kandan G. Sivakumar A. N. Shylesha M. K. Prasanna Kumar D. Pramesh M. Sujithra H. K. Ranganath S. N. Sushil Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field Egyptian Journal of Biological Pest Control Coconut Biocontrol Entomopathogenic fungi Entomopathogenic bacteria Biopesticides |
| title | Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field |
| title_full | Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field |
| title_fullStr | Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field |
| title_full_unstemmed | Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field |
| title_short | Assessment of bio-formulations of indigenous strains of Bacillus thuringiensis, Metarhizium robertsii and Metarhizium majus for management of the rhinoceros beetle, Oryctes rhinoceros L., in field |
| title_sort | assessment of bio formulations of indigenous strains of bacillus thuringiensis metarhizium robertsii and metarhizium majus for management of the rhinoceros beetle oryctes rhinoceros l in field |
| topic | Coconut Biocontrol Entomopathogenic fungi Entomopathogenic bacteria Biopesticides |
| url | https://doi.org/10.1186/s41938-023-00715-x |
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