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Guide BA, Andaló V, Ferreira DG, Alves VS, Fernandes TAP, Neves PMOJ. First report and biological characteristics of Heterorhabditis amazonensis in the state of Paraná, Brazil. BRAZ J BIOL 2024; 84:e262374. [DOI: 10.1590/1519-6984.262374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/15/2022] [Indexed: 11/22/2022] Open
Abstract
Abstract Entomopathogenic nematodes (EPNs) from Heterorhabditidae and Steinernematidae families are extensively used to control insect pests. In Brazil, however, relatively few studies have identified and characterized these entomopathogens. The objective of this study was to identify and characterize an EPN isolate obtained from soil samples collected in the state of Paraná, Brazil. An isolate (UEL 08) of Heterorhabditis was detected in a soil sample collected from a pasture area cultivated with Brachiaria grass in Londrina, state of Paraná, Brazil (23°34ʹ311ʹʹS, 050°58ʹ298ʹʹW), using the insect-baiting technique with Galleria mellonella larvae as hosts. The nematode was identified through morphometric studies and molecular analyses based on amplification of the rDNA ITS region. Although we identified certain morphometric differences compared with the original description, the molecular data indicated that the ITS sequence obtained for the UEL 08 isolate is identical to the reference sequence of H. amazonensis (DQ665222) and presented 100% similarity. Thus, the findings of our morphological and molecular studies confirmed that the isolated nematode is H. amazonensis, which is the first time this species has been registered in Paraná. Study of the biological characteristics of H. amazonensis (UEL 08) revealed that the isolate has two distinct life cycles – one short (216 h) and the other long (288 h) – and produces two generations in both cycles. We observed that H. amazonensis (UEL 8) was pathogenic and virulent to the three evaluated hosts, although with different virulence against these hosts. The larvae of G. mellonella and Alphitobius diaperinus were more susceptible than adult Dichelops (Diacereus) melacanthus, with 100%, 85%, and 46% mortality, respectively. Furthermore, an in vivo production assay revealed a mean daily yield of 3.4 × 103 infective juveniles/g host larvae.
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Affiliation(s)
| | - V. Andaló
- Universidade Federal de Uberlândia, Brasil
| | | | - V. S. Alves
- Universidade Estadual do Norte do Paraná, Brasil
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Functional Diversity of Soil Nematodes in Relation to the Impact of Agriculture—A Review. DIVERSITY 2021. [DOI: 10.3390/d13020064] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The analysis of the functional diversity of soil nematodes requires detailed knowledge on theoretical aspects of the biodiversity–ecosystem functioning relationship in natural and managed terrestrial ecosystems. Basic approaches applied are reviewed, focusing on the impact and value of soil nematode diversity in crop production and on the most consistent external drivers affecting their stability. The role of nematode trophic guilds in two intensively cultivated crops are examined in more detail, as representative of agriculture from tropical/subtropical (banana) and temperate (apple) climates. The multiple facets of nematode network analysis, for management of multitrophic interactions and restoration purposes, represent complex tasks that require the integration of different interdisciplinary expertise. Understanding the evolutionary basis of nematode diversity at the field level, and its response to current changes, will help to explain the observed community shifts. Integrating approaches based on evolutionary biology, population genetics and ecology can quantify the contribution of nematode fauna to fundamental soil functions. These include carbon transformation, nutrient cycling, pest control and disease transmission. In conclusion, different facets of nematode diversity such as trophic groups, life history traits, variability in body size and/or taxa identities in combination with DNA-based techniques are needed in order to disclose nematode–soil–ecosystem functioning relationships. Further experimental studies are required to define locally adapted and sustainable management practices, through ecosystem-based approaches and nature-based solutions.
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San-Blas E, Campos-Herrera R, Dolinski C, Monteiro C, Andaló V, Leite LG, Rodríguez MG, Morales-Montero P, Sáenz-Aponte A, Cedano C, López-Nuñez JC, Del Valle E, Doucet M, Lax P, Navarro PD, Báez F, Llumiquinga P, Ruiz-Vega J, Guerra-Moreno A, Stock SP. Entomopathogenic nematology in Latin America: A brief history, current research and future prospects. J Invertebr Pathol 2019; 165:22-45. [PMID: 30940472 DOI: 10.1016/j.jip.2019.03.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 12/31/2018] [Accepted: 03/29/2019] [Indexed: 10/27/2022]
Abstract
Since the 1980s, research into entomopathogenic nematodes (EPNs) in Latin America has produced many remarkable discoveries. In fact, 16 out of the 117 recognized species of EPNs have been recovered and described in the subcontinent, with many more endemic species and/or strains remaining to be discovered and identified. In addition, from an applied perspective, numerous technological innovations have been accomplished in relation to their implementation in biocontrol. EPNs have been evaluated against over 170 species of agricultural and urban insects, mites, and plant-parasitic nematodes under laboratory and field conditions. While much success has been recorded, many accomplishments remain obscure, due to their publication in non-English journals, thesis dissertations, conference proceedings, and other non-readily available sources. The present review provides a brief history of EPNs in Latin America, including current findings and future perspectives.
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Affiliation(s)
- Ernesto San-Blas
- Instituto Venezolano de Investigaciones Científicas, Centro de Estudios Botánicos y Agroforestales, Laboratorio de Protección Vegetal, Calle 79 con Av. 8 (Santa Rita), Maracaibo C.P. 4001, Venezuela.
| | | | - Claudia Dolinski
- Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), CCTA/LEF, Campos dos Goytacazes, RJ, Brazil
| | - Caio Monteiro
- Universidade Federal de Goiás (UFG), Departamento de Microbiologia, Imunologia, Parasitologia e Patologia, Instituto de Patologia Tropical e Saúde Pública, Goiânia, GO, Brazil
| | - Vanessa Andaló
- Universidade Federal de Uberlândia (UFU), Campus Monte Carmelo, LMG 746, km 01, Monte Carmelo, MG, Brazil
| | | | - Mayra G Rodríguez
- Dirección de Sanidad Vegetal, Centro Nacional de Sanidad Agropecuaria (CENSA), Apartado 10, San José de las Lajas, Provincia Mayabeque, Cuba
| | - Patricia Morales-Montero
- Instituto Venezolano de Investigaciones Científicas, Centro de Estudios Botánicos y Agroforestales, Laboratorio de Protección Vegetal, Calle 79 con Av. 8 (Santa Rita), Maracaibo C.P. 4001, Venezuela
| | - Adriana Sáenz-Aponte
- Laboratorio de Control Biológico, Biología de Plantas y Sistemas Productivos, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
| | - Carolina Cedano
- Universidad Nacional de Trujillo (UNT), Avenida Juan Pablo II s/n, Trujillo-La Libertad, Peru
| | | | - Eleodoro Del Valle
- Facultad de Ciencias Agrarias, Universidad Nacional del Litoral - Esperanza, Santa Fe, Argentina
| | - Marcelo Doucet
- Instituto de Diversidad y Ecología Animal (CONICET-UNC) Centro de Zoología Aplicada, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, X5000AVP Córdoba, Argentina
| | - Paola Lax
- Instituto de Diversidad y Ecología Animal (CONICET-UNC) Centro de Zoología Aplicada, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, X5000AVP Córdoba, Argentina
| | | | - Francisco Báez
- Instituto Nacional de Investigaciones Agropecuarias INIAP, Departamento de Proteccion Vegetal, Quito, Ecuador
| | - Pablo Llumiquinga
- Instituto Nacional de Investigaciones Agropecuarias INIAP, Departamento de Proteccion Vegetal, Quito, Ecuador
| | - Jaime Ruiz-Vega
- Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional (CIIDIR) Unidad Oaxaca, Instituto Politécnico Nacional, Calle Hornos 1003, Col. Noche Buena, C.P. 71230 Oaxaca, Mexico
| | | | - S Patricia Stock
- Department of Entomology, University of Arizona, Forbes Bldg., Room 410, 1140 E. South Campus Dr., Tucson, AZ 85721-0036, USA
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