Aislados de nematodos entomógenos, Heterorhabditis spp., y la mortalidad de larvas de los insectos Galleria mellonella (L), Cylas formicarius (Fabricius), Euscepes postfasciatus (Fairmaire) y Cosmopolites sordidus (Germar)

Figueroa, Wilfredo; Román, Jessé; Acosta, Marcos A.

doi:10.46429/jaupr.v77i1-2.4166

Cited by 3 publications

(3 citation statements)

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“…Soil samples collected from different localities of Puerto Rico were processed for the isolation of entomopathogenic nematodes. Nematodes obtained were maintained in the laboratory following the methodology described by Figueroa et al (1993). Twenty of the isolates collected were identified as belonging to the genus Heterorhabditis (Poinar, 1990); Isolates 1 and 2 from Catano, 3 and 20 from Piñones, 4 from Rio Piedras, 5 from Loiza, 6 and 7 from Rio Grande, 8 from Palmer, 9 to 12 from El Yunque, 13 from Luquillo, 14 and 15 from Ceiba, 16 from Patillas, 17 from Manatí, 18 from Adjuntas and 19 from Villalba.…”

Section: Methodsmentioning

confidence: 99%

Evaluación morfométrica de 20 aislados de Heterorhabditis de Puerto Rico

Román¹,

Figueroa²

1995

JAUPR

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From November 1992 through January 1993 soil samples were collected from different localities of Puerto Rico to isolate entomopathogenic nematodes. Samples were baited with the greater wax moth, Galleria mellonella, under laboratory conditions. Nematodes belonging to the genus Heterorhabditis were isolated from 20 of the baited samples. The nematodes could not be properly identified to species but were found closely related to H. bacteriophora and H. indicus. Thirteen morphometric characters of the infective third-stage juvenile were measured for each isolate and subjected to evaluation by Standard Descriptive Statistics, Stepwise Discriminant Analysis, Canonical Discriminant Analysis and Hierarchical Cluster Analysis. Results suggested the presence of a new species of Heterorhabditis with sufficient variation among the isolates to separate three different subgroups.

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Section: Methodsmentioning

confidence: 99%

Evaluación morfométrica de 20 aislados de Heterorhabditis de Puerto Rico

Román¹,

Figueroa²

1995

JAUPR

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“…Excellent control of BW was obtained by applying EPN in moist and cryptic habitats, considered as alternative methods [169][170][171]. Several EPN species/populations were evaluated in laboratory and field assays for BW management and other pests, such as the banana moth Opogona sacchari (bunch pest in the Canary Islands and Brazil) and Metamasius spp., minor or sporadic banana pests in America [169][170][171][172][173]. EPN diversity is an important resource in BW bio-management, but few studies have been conducted on the variability of local EPN populations.…”

Section: Diversity and Function Of Epn In Banana Cropsmentioning

confidence: 99%

“…Several Steinernema and Heterorhabditis spp. have been tested in tropical and subtropical areas [171][172][173][174][175][176][177][178][179][180][181][182][183][184]. Many species/populations were recovered in several tropical countries, when prospecting for EPN, both in Musa spp.…”

Section: Diversity and Function Of Epn In Banana Cropsmentioning

confidence: 99%

Functional Diversity of Soil Nematodes in Relation to the Impact of Agriculture—A Review

et al. 2021

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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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Steinernema costaricense n. sp. and S. puntauvense n. sp. (Rhabditida: Steinernematidae), two new entomopathogenic nematodes from Costa Rica

2007

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Steinernema costaricense n. sp. and S. puntauvense n. sp. were recovered during a survey for native entomopathogenic nematodes in Costa Rica. Morphological data, molecular (28S rDNA sequence data) studies and cross-hybridisation tests were used for diagnostic and identification purposes. Additionally, 28S rDNA sequence data were used to assess the evolutionary relationships of the new species with other Steinernema spp. Morphological diagnostic features for S. costaricense n. sp. include: the body size of the infective juvenile (av. 1,696); the presence of protruding 'horn-like' cephalic papillae; the position of the excretory pore in the infective juvenile (av. 77 microm) and the first generation male (av. 117 microm); the D% value of the infective juvenile (av. 53) and the first generation male (av. 56); the E% value of the infective juvenile (av. 85); and the morphology of the spicules and gubernaculum of the first generation male. Diagnostic traits for S. puntauvense n. sp. are: the position of the excretory pore in the infective juveniles (av. 25 microm); the shape and size of the spicules and gubernaculum of the first generation male; and the shape of the tail of the first generation female. In addition to these traits, 28S rDNA sequences analysis and hybridisation tests showed that both new Steinernema species are distinct and unique entities.

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Aislados de nematodos entomógenos, Heterorhabditis spp., y la mortalidad de larvas de los insectos Galleria mellonella (L), Cylas formicarius (Fabricius), Euscepes postfasciatus (Fairmaire) y Cosmopolites sordidus (Germar)

Cited by 3 publications

References 1 publication

Evaluación morfométrica de 20 aislados de Heterorhabditis de Puerto Rico

Evaluación morfométrica de 20 aislados de Heterorhabditis de Puerto Rico

Functional Diversity of Soil Nematodes in Relation to the Impact of Agriculture—A Review

Steinernema costaricense n. sp. and S. puntauvense n. sp. (Rhabditida: Steinernematidae), two new entomopathogenic nematodes from Costa Rica

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