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Velozo SGM, Velozo MR, Domingues MM, Becchi LK, Carvalho VRD, Passos JRDS, Zanuncio JC, Serrão JE, Stephan D, Wilcken CF. From the dual cyclone harvest performance of single conidium powder to the effect of Metarhizium anisopliae on the management of Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae). PLoS One 2023; 18:e0283543. [PMID: 36972276 PMCID: PMC10042367 DOI: 10.1371/journal.pone.0283543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 03/10/2023] [Indexed: 03/29/2023] Open
Abstract
Insect pests introduced in eucalyptus plantations in Brazil are mostly of Australian origin, but native microorganisms have potential for their management. High quality biopesticide production based on entomopathogenic fungi depends on adequate technologies. The objective of this study was to evaluate Mycoharvester® equipment to harvest and separating particles to obtain pure Metarhizium anisopliae conidia to manage Thaumastocoris peregrinus Carpintero & Dellapé, 2006 (Hemiptera: Thaumastocoridae). The Mycoharvester® version 5b harvested and separated M. anisopliae spores. The pure conidia were suspended in Tween 80® (0.1%) and calibrated to the concentrations of 1 x 106, 107, 108 and 109 conidia/ml to evaluate the pathogenicity, lethal concentration 50 and 90 (LC50, LC90) and lethal time 50 and 90 (LT50, LT90) of this fungus to T. peregrinus. This equipment harvested 85% of the conidia from rice, with production of 4.8 ± 0.38 x 109 conidia/g dry mass of substrate + fungus. The water content of 6.36% of the single spore powder (pure conidia) separated by the Mycoharvester® was lower than that of the agglomerated product. The product harvested at the concentrations of 108 and 109 conidia/ml caused high mortality to T. peregrinus third instar nymphs and adults. The separation of conidia produced by solid-state fermentation with the Mycoharvester® is an important step toward optimizing the fungal production system of pure conidia, and to formulate biopesticides for insect pest management.
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Affiliation(s)
- Simone Graziele Moio Velozo
- Faculdade de Ciências Agronômicas, Laboratório de Controle Biológico de Pragas Florestais, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brasil
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil
| | | | - Maurício Magalhães Domingues
- Faculdade de Ciências Agronômicas, Laboratório de Controle Biológico de Pragas Florestais, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brasil
| | - Luciane Katarine Becchi
- Faculdade de Ciências Agronômicas, Laboratório de Controle Biológico de Pragas Florestais, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brasil
| | - Vanessa Rafaela de Carvalho
- Faculdade de Ciências Agronômicas, Laboratório de Controle Biológico de Pragas Florestais, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brasil
| | - José Raimundo de Souza Passos
- Departamento de Bioestatística, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brasil
| | - José Cola Zanuncio
- Departamento de Entomologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil
| | - José Eduardo Serrão
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil
| | - Dietrich Stephan
- Julius Kühn-Institut, Institute for Biological Control, Federal Research Centre for Cultivated Plants, Darmstadt, Germany
| | - Carlos Frederico Wilcken
- Faculdade de Ciências Agronômicas, Laboratório de Controle Biológico de Pragas Florestais, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brasil
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Repke RA, Velozo MR, Domingues MC, Rodrigues JD. EFEITOS DA APLICAÇÃO DE REGULADORES VEGETAIS NA CULTURA DA ALFACE (Lactuca sativa) CRESPA var. Verônica e AMERICANA var. Lucy Brow. Nucleus 2009. [DOI: 10.3738/1982.2278.203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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