Entomopathogenic nematode distribution and edaphoclimatic conditions in the Cerrado of Minas Gerais, Brazil

Andaló, Vanessa; Mieko, Jéssica; Carvalho, Fábio Janoni; Assis, Gleice Aparecida de; Faria, Lucas Silva de; Assis, Franscinely Aparecida de; Santos, Ronaldo Antonio dos; Rosa, Francielle

doi:10.1007/s13355-017-0538-4

Cited by 7 publications

(8 citation statements)

References 30 publications

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“…This study did not present positive samples for EPNs in native forest nor in agricultural crops such as maize, which differs from the positive samples for EPNs found in other studies in Brazil (BARBOSA-NEGRISOLI et al, 2010;ANDALÓ et al, 2018;DE BRIDA et al, 2017). However, this study presented positive samples in pasture and soil areas with green manure, and it corroborates with BARBOSA-NEGRISOLI et al (2010) and differs from the results presented by DE BRIDA et al (2017).…”

Section: Isolation Of Entomopathogenic Nematodes In the West Region Of Santa Catarina Brazilsupporting

confidence: 62%

“…In the state of Minas Gerais, the natural populations of Heterorhabditis amazonensis were found in cerrado and gallery forest areas (ANDALÓ et al, 2018). In the state of Rio Grande do Sul, the occurrence of the species Steinernema feltiae, Steinernema rarum and Steinernema riobrave was reported for the first time in Brazil (BARBOSA-NEGRISOLI et al, 2010).…”

Section: Isolation Of Entomopathogenic Nematodes In the West Region Of Santa Catarina Brazilmentioning

confidence: 99%

“…In a verification survey of EPNs in the state of Minas Gerais, a total of 216 soil samplings was performed, from which three populations of EPNs were identified as H. amazonensis -two populations found in the cerrado area and one in the gallery forest (forest that forms corridor along rivers). Both areas are characterized by the presence of high-density vegetation cover, due to the characteristics associated with these biomes (ANDALÓ et al, 2018).…”

Section: Isolation Of Entomopathogenic Nematodes In the West Region Of Santa Catarina Brazilmentioning

confidence: 99%

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Isolation of entomopathogenic nematodes in the west region of Santa Catarina, Brazil

2020

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Entomopathogenic nematodes (EPNs) are potential candidate for integrated pest management programs. As little is known about the presence of these organisms in the state of Santa Catarina, it was aimed to perform soil sampling in the cities of Chapecó, Palmitos, Seara and Concordia for the isolation of EPNs. In total, 200 samples (100 g soil) were collected. In Chapecó, 40 samples from soil containing green manure (Raphanus sativus), five samples from native forest area and five samples from riparian forest were collected. In the city of Palmitos, 40 soil samples were obtained in the areas of soybean (Glycine max), corn (Zea mays), oats (Avena strigosa), and pasture (Pennisetum purpureum), and in each location 10 samples were taken. Sixty soil samples were collected in the city of Concordia, in a pasture area (A. strigosa). In Seara, the 50 soil samples were collected at a pasture consortium site between ryegrass (Lolium multiflorum) and black oats (A. strigosa). For the isolation, the collected soil samples were conditioned in 350 mL plastic containers and sent to the laboratory of the university. Later, four larvae of Tenebrio molitor of last instar were inserted, and the sets were maintained at the temperature of 25°C for seven days. After this period, the presence of dead larvae was verified, and the confirmation of the mortality by EPNs was evaluated using of White’s trap. The positive samples for EPNs were obtained from the cities of Chapecó and Concordia, which corresponded to 2% of the total soil samples.

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Section: Isolation Of Entomopathogenic Nematodes In the West Region Of Santa Catarina Brazilsupporting

confidence: 62%

Section: Isolation Of Entomopathogenic Nematodes In the West Region Of Santa Catarina Brazilmentioning

confidence: 99%

Section: Isolation Of Entomopathogenic Nematodes In the West Region Of Santa Catarina Brazilmentioning

confidence: 99%

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Isolation of entomopathogenic nematodes in the west region of Santa Catarina, Brazil

2020

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“…The identification of EPNs adapted to local environmental and climatic conditions is important because some factors may interfere on their survival, behavior and development, such as predators, ultraviolet radiation, temperatures, soil moisture and texture, osmotic stress and pesticides (Andaló et al 2018, Glazer 2002, Brown & Gaugler 1997) that can affect sustainable pest suppression in integrated pest management programs (De Brida et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Steinernema diaprepesi Nguyen & Duncan (Rhabditida: Steinernematidae), a new entomopathogenic nematode from Brazil

Horta

Damascena

Carvalho

et al. 2021

An. Acad. Bras. Ciênc.

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Entomopathogenic nematodes (EPNs) can control pests due to their mutual association with bacteria. The use of these biological control agents is increasing worldwide due to advances in research about its control effi ciency, range of action and mass production. The identifi cation of EPNs adapted to specifi c environmental and climatic conditions is important for sustainable pest suppression in integrated management (IPM) programs. The objective is to report, for the fi rst time, the occurrence of the Steinernema diaprepesi in Brazil. Steel mesh traps with Galleria mellonella Linnaeus (Lepidoptera: Pyralidae) larvae were buried in red latosol cultivated with Eucalyptus.Infective juveniles (IJs) were isolated from dead larvae and multiplied in healthy ones of this host to confi rm its pathogenicity and to start a laboratory population from the strain found in the fi eld. The DNA of the IJs was extracted and amplifi ed using PCR technique with the universal primers D2A and D3B. The detection of S. diaprepesi is the fi rst report of this nematode in Brazil, increasing the knowledge about its distribution in the world and the diversity of EPNs that must be considered as agents of biological pest control in the country.

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“…Sin embargo, debido a que los NEPs pueden ser afectados por factores y condiciones ambientales, tales como temperatura, radiación solar (rayos UV) y características propias del suelo como acidez, materia orgánica y textura (Bedding, 1990;Andaló et al, 2018), se requiere de estrategias que permitan su sobrevivencia en el campo, como el uso de distintos métodos de encapsulamiento (Peters, 2016;Bogantes, Flores, Castellón, & Uribe, 2018) o el aislamiento de cepas adaptadas a las condiciones del agroecosistema.…”

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Factores edáficos y nemátodos entomopatógenos en un agroecosistema neotropical de banano

Barahona

Morales

Lorío

2020

RBT

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Introducción: En Costa Rica el banano es uno de los cultivos más importantes en términos de producción y exportaciones, que requiere la aplicación de agroquímicos para controlar el efecto de plagas como el picudo negro, Cosmopolites sordidus. Debido a los efectos dañinos en la salud humana y ambiental, y la posibilidad de que las plagas presenten resistencia a estas sustancias, es necesario investigar alternativas amigables con el medio ambiente como potenciales controladores biológicos. Los nemátodos entomopatógenos (NEPs) de los géneros Heterorhabditis y Steinernema presentan una relación simbiótica con bacterias de los géneros Photorhabdus y Xenorhabdus respectivamente y este complejo ha sido ampliamente estudiado como controlador biológico debido a su capacidad de eliminar insectos hospederos en horas. Objetivo: Determinar la presencia de nemátodos de los géneros Heterorhabditis y Steinernema en suelos de plantaciones de banano del Caribe costarricense y zonas aledañas y caracterizar su hábitat. Metodología: Se tomaron muestras de suelo en plantaciones y áreas circundantes, a partir de las cuales, se llevó cabo aislamiento de NEPs y análisis químicos, físicos y microbiológicos (pH, acidez, materia orgánica, Ca, K, Mg, P, Fe, Cu, Zn, Mn, textura del suelo, biomasa y respiración microbiana). Se encontraron diferencias entre sitios de muestreo, y muestras con presencia y ausencia de NEPs, y se realizó un análisis de componentes principales utilizando las variables con mayor influencia en ambas categorías para encontrar combinaciones de las mismas que explicaran la presencia según condiciones del hábitat. Se efectuó un análisis discriminante para determinar la eficiencia de las variables seleccionadas en el diagnóstico de presencia. Resultados: Se mostró que las variables relacionadas con la presencia de NEPs corresponden a materia orgánica, biomasa microbiana de carbono y respiración microbiana. Se encontró que el 38.4 % de las muestras fueron positivas con respecto a la presencia de los mismos, de las cuales el 95 % corresponde al género Steinernema y el 5 % restante a Heterorhabditis. Según la ecuación discriminante cuadrática, de un 81.2 % de las muestras sin nemátodos, seis deberían pertenecer al grupo con presencia de los mismos; mientras que para aquellas que contenían NEPs, un 55.0 % (nueve de 20) al grupo de ausencia. Conclusiones: No se observaron diferencias estadísticas entre los hábitats de muestreo seleccionados (P = 0.4296), por lo que se determinó que las tres variables mencionadas anteriormente influyen en la presencia de NEPs y valores altos indican condiciones favorables para su persistencia.

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Entomopathogenic nematode distribution and edaphoclimatic conditions in the Cerrado of Minas Gerais, Brazil

Cited by 7 publications

References 30 publications

Isolation of entomopathogenic nematodes in the west region of Santa Catarina, Brazil

Isolation of entomopathogenic nematodes in the west region of Santa Catarina, Brazil

Steinernema diaprepesi Nguyen & Duncan (Rhabditida: Steinernematidae), a new entomopathogenic nematode from Brazil

Factores edáficos y nemátodos entomopatógenos en un agroecosistema neotropical de banano

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