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Mr. William Viera
INIAP

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Journal article
Published: 18 August 2021 in Sustainability
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Agroforestry systems have become an alternative that promotes the conservation of natural resources and the sustainable production of fruit crops in the Ecuadorian Amazon. However, it is required to demonstrate the benefit of the companion species that make up these production systems. The objective of this research was to determine how the legume species within an agroforestry system influence the yield of yellow dragon fruit (pitahaya), carbon sequestration and nutritional contribution. The experiment was carried out in Palora (province of Morona Santiago) and organized in a randomized complete block design with three replications. The treatments were two agroforestry arrangements and the monoculture as a control treatment. Erythrina poeppigiana, Gliricidia sepium and Flemingia macrophylla were used in the agroforestry arrangements for the contribution of biomass. Results showed that during the five years of study, pitahaya yield was influenced by the quality of the leaf litter (biomass) incorporated in to the fruit crop. Biomass from E. poeppigiana and F. macrophylla as companion crops contributed a greater amount of Ca and Mg, increased C sequestration and crop yield. The results suggest that the use of legume species in agroforestry systems positively affects pitahaya productivity, enabling sustainable agriculture in the Ecuadorian Amazon.

ACS Style

Yadira Vargas-Tierras; Alejandra Díaz; Carlos Caicedo; Julio Macas; Alfonso Suárez-Tapia; William Viera. Benefits of Legume Species in an Agroforestry Production System of Yellow Pitahaya in the Ecuadorian Amazon. Sustainability 2021, 13, 9261 .

AMA Style

Yadira Vargas-Tierras, Alejandra Díaz, Carlos Caicedo, Julio Macas, Alfonso Suárez-Tapia, William Viera. Benefits of Legume Species in an Agroforestry Production System of Yellow Pitahaya in the Ecuadorian Amazon. Sustainability. 2021; 13 (16):9261.

Chicago/Turabian Style

Yadira Vargas-Tierras; Alejandra Díaz; Carlos Caicedo; Julio Macas; Alfonso Suárez-Tapia; William Viera. 2021. "Benefits of Legume Species in an Agroforestry Production System of Yellow Pitahaya in the Ecuadorian Amazon." Sustainability 13, no. 16: 9261.

Journal article
Published: 10 February 2021 in Agronomy
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An application of a balanced nutrition will improve the soil as well as enhance the yield of naranjilla (Solanum quitoense Lam.) grown in the Ecuadorian Amazon. A field experiment was carried out in Palora, 16 de Agosto (Morona Santiago province) and Fátima (Pastaza province) to find which variables are related with the yield of the naranjilla crop and the yield response when the crop receives complete nutrition with N, P, K, Ca, Mg, and S plus lime and with the omission of each of these nutrients. A Random Complete Block Design with three replications was used in the three environments. The naranjilla crop had higher yields (18.14 Mg ha−1) in the complete treatments (N, P, K, Ca, Mg, and S) and without S and Mg, consequently, these two last nutrients did not limit the production. When N, P, K, and Ca were not applied, the yields fell to 14.62 Mg ha−1. The main environmental effect showed that Palora had the highest fruit yields (19.73 Mg ha−1), followed by 16 de Agosto (13.57 Mg ha−1) and finally Fátima with 11.04 (Mg ha−1). These preliminary results showed that with the treatments without S (18.55 Mg ha−1), without Mg (18.42 Mg ha−1) and complete (17.46 Mg ha−1) the highest yields were obtained, consequently, the production was not affected by the absence of these elements; the opposite happened when N, P, K, and Ca were not present.

ACS Style

William Viera; Alejandra Díaz; Carlos Caicedo; Alfonso Suárez; Yadira Vargas. Key Agronomic Fertilization Practices that Influence Yield of Naranjilla (Solanum quitoense) in the Ecuadorian Amazon. Agronomy 2021, 11, 310 .

AMA Style

William Viera, Alejandra Díaz, Carlos Caicedo, Alfonso Suárez, Yadira Vargas. Key Agronomic Fertilization Practices that Influence Yield of Naranjilla (Solanum quitoense) in the Ecuadorian Amazon. Agronomy. 2021; 11 (2):310.

Chicago/Turabian Style

William Viera; Alejandra Díaz; Carlos Caicedo; Alfonso Suárez; Yadira Vargas. 2021. "Key Agronomic Fertilization Practices that Influence Yield of Naranjilla (Solanum quitoense) in the Ecuadorian Amazon." Agronomy 11, no. 2: 310.

Journal article
Published: 01 February 2021 in Research, Society and Development
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Avocado (Persea americana) is a fruit crop of economic importance in Ecuador. Currently, a low incidence of Phytophthora cinnamomi has been reported, however, there are other soil pathogens that can affect this crop, even at the initial stages of plant multiplication (nursery), for this reason the use of rootstocks that tolerate these biotic adversities is recommended. In this research, the fungus Fusarium oxysporum was isolated from roots of nursery seedlings with symptoms of necrosis. In addition, an isolate of this pathogenic fungus modified with a strain of Agrobacterium tumefaciens was used to determine the infection of F. oxysporum in the roots of the Fuerte (commercial) and Criollo (local) cultivars. The results allowed to infer that the cultivar Criollo presented a greater tolerance to F. oxysporum than the cultivar Fuerte, which corroborates its use as a rootstock for commercial avocado varieties. Furthermore, to our knowledge, this is the first report of F. oxysporum affecting avocado nursery seedlings in Ecuador.

ACS Style

Grace Estefanía Uribe Hurtado; William Fernando Viera Arroyo; Álvaro Xavier Sampedro Lema; Kang Jin Cho; Alicia Beatriz Villavicencio Pazos; Francisco Javier Flores Flor. Colonization of Fusarium oxysporum transformed with the red fluorescence protein gene (tdTomato) mediated by Agrobacterium tumefaciens in roots of two avocado cultivars. Research, Society and Development 2021, 10, 1 .

AMA Style

Grace Estefanía Uribe Hurtado, William Fernando Viera Arroyo, Álvaro Xavier Sampedro Lema, Kang Jin Cho, Alicia Beatriz Villavicencio Pazos, Francisco Javier Flores Flor. Colonization of Fusarium oxysporum transformed with the red fluorescence protein gene (tdTomato) mediated by Agrobacterium tumefaciens in roots of two avocado cultivars. Research, Society and Development. 2021; 10 (2):1.

Chicago/Turabian Style

Grace Estefanía Uribe Hurtado; William Fernando Viera Arroyo; Álvaro Xavier Sampedro Lema; Kang Jin Cho; Alicia Beatriz Villavicencio Pazos; Francisco Javier Flores Flor. 2021. "Colonization of Fusarium oxysporum transformed with the red fluorescence protein gene (tdTomato) mediated by Agrobacterium tumefaciens in roots of two avocado cultivars." Research, Society and Development 10, no. 2: 1.

Journal article
Published: 10 January 2021 in Ciencia & Tecnología Agropecuaria
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In the northern region of the Ecuadorian Amazon, there are papaya genotypes with acceptable production and fruit quality traits; however, they are heterogeneous. The aim of this research was to evaluate papaya genotypes for the selection of individuals through fruit quality traits. The study was carried out at the Central Amazon Experimental Station of Instituto Nacional de Investigaciones Agropecuarias, located in the canton La Joya de los Sachas, Orellana Province. A completely randomized design with a different number of observations according to the number of individuals per genotype was used. The recorded variables were: fruit weight (kg), pulp weight (kg), peel weight (kg), fruit diameter (cm), fruit length (cm), pulp thickness (cm), fruit firmness (kg-f), pH, total soluble solids (°Bx), titratable acidity, and flavor ratio. Data were subjected to one-way analysis of variance, mean comparison tests (Tukey 95%) for dendrograms, correlation matrix, and Biplot graphs. Results showed individuals with high production (more than 50 fruits/plant) and fruits with market demanded traits for fresh consumption (fruit weight between 0.2 and ≥ 2.0 kg, and soluble solids content ≥ 11.5 °Bx). In addition, ten elite individuals were identified as they meet the dual production and fruit quality traits, and must be considered for future breeding programmes.

ACS Style

Yadira Beatriz Vargas Tierras; Alejandra Evelyn Díaz Martínez; Carlos Danilo Congo Yépez; Leider Anibar Tinoco Jaramillo; William Fernando Viera Arroyo. Comparison of fruit quality traits of papaya (Carica papaya L.) genotypes from Shushufindi and La Joya de los Sachas, Ecuador. Ciencia & Tecnología Agropecuaria 2021, 22, 1 .

AMA Style

Yadira Beatriz Vargas Tierras, Alejandra Evelyn Díaz Martínez, Carlos Danilo Congo Yépez, Leider Anibar Tinoco Jaramillo, William Fernando Viera Arroyo. Comparison of fruit quality traits of papaya (Carica papaya L.) genotypes from Shushufindi and La Joya de los Sachas, Ecuador. Ciencia & Tecnología Agropecuaria. 2021; 22 (1):1.

Chicago/Turabian Style

Yadira Beatriz Vargas Tierras; Alejandra Evelyn Díaz Martínez; Carlos Danilo Congo Yépez; Leider Anibar Tinoco Jaramillo; William Fernando Viera Arroyo. 2021. "Comparison of fruit quality traits of papaya (Carica papaya L.) genotypes from Shushufindi and La Joya de los Sachas, Ecuador." Ciencia & Tecnología Agropecuaria 22, no. 1: 1.

Journal article
Published: 01 December 2020 in Revista Española de Documentación Científica
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La producción científica en Ecuador ha seguido un patrón similar a la evolución de otros países latinoamericanos, existiendo escasa generación de documentos indexados; pero en los últimos años se ha incrementado. El INIAP ha plasmado los resultados de sus investigaciones en publicaciones técnicas, dípticos, guías, manuales, entre otros. Desde el año 2014 ha tenido un aumento sostenido en su producción científica, debido a nueva reglamentación de acreditación e incentivos a investigadores. El objetivo de la presente investigación fue realizar un análisis de la producción científica del INIAP durante el periodo 2014-2019. Los resultados mostraron un aumentó 3,1 veces durante el periodo analizado, superando el crecimiento latinoamericano en ese mismo tiempo. Se determinó que más del 54% de las publicaciones del INIAP tienen colaboración internacional y el 62% de publicaciones están indexadas en revistas con índice SJR. Estos resultados indican que INIAP ha incrementado su producción y calidad científica en investigación agropecuaria.

ACS Style

William Viera-Arroyo; Víctor Sánchez-Arizo; Jorge Merino-Toro; Juan Domínguez-Andrade. Producción científica del Ecuador en el ámbito agropecuario: caso del Instituto Nacional de Investigaciones Agropecuarias, periodo 2014-2019. Revista Española de Documentación Científica 2020, 43, e280 -e280.

AMA Style

William Viera-Arroyo, Víctor Sánchez-Arizo, Jorge Merino-Toro, Juan Domínguez-Andrade. Producción científica del Ecuador en el ámbito agropecuario: caso del Instituto Nacional de Investigaciones Agropecuarias, periodo 2014-2019. Revista Española de Documentación Científica. 2020; 43 (4):e280-e280.

Chicago/Turabian Style

William Viera-Arroyo; Víctor Sánchez-Arizo; Jorge Merino-Toro; Juan Domínguez-Andrade. 2020. "Producción científica del Ecuador en el ámbito agropecuario: caso del Instituto Nacional de Investigaciones Agropecuarias, periodo 2014-2019." Revista Española de Documentación Científica 43, no. 4: e280-e280.

Journal article
Published: 01 November 2020 in Journal of the Selva Andina Biosphere
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ACS Style

William Fernando Viera-Arroyo; Cristina Margarita Tello-Torres; Aníbal Arturo Martínez-Salinas; Daniel Fernando Navia-Santillán; Lorena Anabel Medina-Rivera; Alex Gabriel Delgado-Párraga; Cynthia Estefanía Perdomo-Quispe; Ana Katherine Pincay-Verdezoto; Francisco Javier Báez-Cevallos; Wilson Arturo Vásquez-Castillo; Trevor Jackson. Control Biológico: Una herramienta para una agricultura sustentable, un punto de vista de sus beneficios en Ecuador. Journal of the Selva Andina Biosphere 2020, 8, 128 -149.

AMA Style

William Fernando Viera-Arroyo, Cristina Margarita Tello-Torres, Aníbal Arturo Martínez-Salinas, Daniel Fernando Navia-Santillán, Lorena Anabel Medina-Rivera, Alex Gabriel Delgado-Párraga, Cynthia Estefanía Perdomo-Quispe, Ana Katherine Pincay-Verdezoto, Francisco Javier Báez-Cevallos, Wilson Arturo Vásquez-Castillo, Trevor Jackson. Control Biológico: Una herramienta para una agricultura sustentable, un punto de vista de sus beneficios en Ecuador. Journal of the Selva Andina Biosphere. 2020; 8 (2):128-149.

Chicago/Turabian Style

William Fernando Viera-Arroyo; Cristina Margarita Tello-Torres; Aníbal Arturo Martínez-Salinas; Daniel Fernando Navia-Santillán; Lorena Anabel Medina-Rivera; Alex Gabriel Delgado-Párraga; Cynthia Estefanía Perdomo-Quispe; Ana Katherine Pincay-Verdezoto; Francisco Javier Báez-Cevallos; Wilson Arturo Vásquez-Castillo; Trevor Jackson. 2020. "Control Biológico: Una herramienta para una agricultura sustentable, un punto de vista de sus beneficios en Ecuador." Journal of the Selva Andina Biosphere 8, no. 2: 128-149.

Journal article
Published: 01 November 2020 in Journal of the Selva Andina Biosphere
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ACS Style

William Fernando Viera-Arroyo; Cristina Margarita Tello-Torres; Aníbal Arturo Martínez-Salinas; Daniel Fernando Navia-Santillán; Lorena Anabel Medina-Rivera; Alex Gabriel Delgado-Párraga; Cynthia Estefanía Perdomo-Quispe; Ana Katherine Pincay-Verdezoto; Francisco Javier Báez-Cevallos; Wilson Arturo Vásquez-Castillo; Trevor Jackson. Biological Control: A tool for sustainable agriculture, a point of view of its benefits in Ecuador. Journal of the Selva Andina Biosphere 2020, 8, 128 -149.

AMA Style

William Fernando Viera-Arroyo, Cristina Margarita Tello-Torres, Aníbal Arturo Martínez-Salinas, Daniel Fernando Navia-Santillán, Lorena Anabel Medina-Rivera, Alex Gabriel Delgado-Párraga, Cynthia Estefanía Perdomo-Quispe, Ana Katherine Pincay-Verdezoto, Francisco Javier Báez-Cevallos, Wilson Arturo Vásquez-Castillo, Trevor Jackson. Biological Control: A tool for sustainable agriculture, a point of view of its benefits in Ecuador. Journal of the Selva Andina Biosphere. 2020; 8 (2):128-149.

Chicago/Turabian Style

William Fernando Viera-Arroyo; Cristina Margarita Tello-Torres; Aníbal Arturo Martínez-Salinas; Daniel Fernando Navia-Santillán; Lorena Anabel Medina-Rivera; Alex Gabriel Delgado-Párraga; Cynthia Estefanía Perdomo-Quispe; Ana Katherine Pincay-Verdezoto; Francisco Javier Báez-Cevallos; Wilson Arturo Vásquez-Castillo; Trevor Jackson. 2020. "Biological Control: A tool for sustainable agriculture, a point of view of its benefits in Ecuador." Journal of the Selva Andina Biosphere 8, no. 2: 128-149.

Journal article
Published: 01 November 2020 in Journal of the Selva Andina Biosphere
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ACS Style

William Fernando Viera-Arroyo. Rol de los microorganismos benéficos en la Agricultura Sustentable. Journal of the Selva Andina Biosphere 2020, 8, 67 -68.

AMA Style

William Fernando Viera-Arroyo. Rol de los microorganismos benéficos en la Agricultura Sustentable. Journal of the Selva Andina Biosphere. 2020; 8 (2):67-68.

Chicago/Turabian Style

William Fernando Viera-Arroyo. 2020. "Rol de los microorganismos benéficos en la Agricultura Sustentable." Journal of the Selva Andina Biosphere 8, no. 2: 67-68.

Journal article
Published: 01 November 2020 in Journal of the Selva Andina Biosphere
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ACS Style

William Fernando Viera-Arroyo. Role of beneficial microorganisms in Sustainable Agriculture. Journal of the Selva Andina Biosphere 2020, 8, 67 -68.

AMA Style

William Fernando Viera-Arroyo. Role of beneficial microorganisms in Sustainable Agriculture. Journal of the Selva Andina Biosphere. 2020; 8 (2):67-68.

Chicago/Turabian Style

William Fernando Viera-Arroyo. 2020. "Role of beneficial microorganisms in Sustainable Agriculture." Journal of the Selva Andina Biosphere 8, no. 2: 67-68.

Journal article
Published: 21 September 2020 in International Journal of Fruit Science
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ACS Style

William Viera; Beatriz Brito; Eddie Zambrano; Lenin Ron; Jorge Merino; Diego Campaña; Hugo Álvarez. Genotype x Environment interaction in the yield and fruit quality of passion fruit germplasm grown in the Ecuadorian Littoral. International Journal of Fruit Science 2020, 20, S1829 -S1844.

AMA Style

William Viera, Beatriz Brito, Eddie Zambrano, Lenin Ron, Jorge Merino, Diego Campaña, Hugo Álvarez. Genotype x Environment interaction in the yield and fruit quality of passion fruit germplasm grown in the Ecuadorian Littoral. International Journal of Fruit Science. 2020; 20 (sup3):S1829-S1844.

Chicago/Turabian Style

William Viera; Beatriz Brito; Eddie Zambrano; Lenin Ron; Jorge Merino; Diego Campaña; Hugo Álvarez. 2020. "Genotype x Environment interaction in the yield and fruit quality of passion fruit germplasm grown in the Ecuadorian Littoral." International Journal of Fruit Science 20, no. sup3: S1829-S1844.

Journal article
Published: 13 August 2020 in Plants
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Andean blackberries (Rubus glaucus Benth) are fruits rich in phytocomponents with high antioxidant activity. In this work, the changes in the total polyphenol content (TPC), the total flavonoid content (TFC), and the total anthocyanin content (TAC) of four blackberry varieties at three maturity stages (E1-25%, E2-50%, and E3-100%) were measured. The antioxidant activity (AA) was evaluated using the 2,2’azinobis-(3-ethylbenzthiazolin 6-sulphonic acid (ABTS) and ferric reducing antioxidant power (FRAP) methods. TPC and TFC content decreased with the increase in the maturity stage. The blackberry Brazos cultivar presented TPC values of 51.26, 38.16, and 31.59 mg of gallic acid equivalents (GAE)/g dry weight (DW) at E1, E2, and E3, respectively. The TAC and soluble solids increased with the increase in the maturity stage of the fruits. The Andimora variety at E3 presented a high TPC content, and the Colombiana variety presented a high TFC content. The blackberry Colombiana cultivar presented TAC values of 1.40, 2.95, and 12.26 mg cy-3-glu/100g DW at E1, E2, and E3, respectively. The blackberry Colombiana cultivar presented a high AA value at 1278.63 µmol TE/g DW according to the ABTS method and 1284.55 µmol TE/g DW according to the FRAP method. The TPC and TFC showed a high correlation with the AA according to the ABTS and the FRAP methods. The Pearson correlation between the TFC and AA/ABTS has a value of r = 0.92. The TFC and AA/FRAP present a value of r = 0.94.

ACS Style

Iván Samaniego; Beatriz Brito; William Viera; Ana Cabrera; Wilma Llerena; Tissa Kannangara; Rubén Vilcacundo; Ignacio Angós; Wilman Carrillo. Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador. Plants 2020, 9, 1027 .

AMA Style

Iván Samaniego, Beatriz Brito, William Viera, Ana Cabrera, Wilma Llerena, Tissa Kannangara, Rubén Vilcacundo, Ignacio Angós, Wilman Carrillo. Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador. Plants. 2020; 9 (8):1027.

Chicago/Turabian Style

Iván Samaniego; Beatriz Brito; William Viera; Ana Cabrera; Wilma Llerena; Tissa Kannangara; Rubén Vilcacundo; Ignacio Angós; Wilman Carrillo. 2020. "Influence of the Maturity Stage on the Phytochemical Composition and the Antioxidant Activity of Four Andean Blackberry Cultivars (Rubus glaucus Benth) from Ecuador." Plants 9, no. 8: 1027.

Journal article
Published: 01 April 2020 in Enfoque UTE
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Soursop (Annona muricata L.) germplasm, from the central region of the Ecuadorian littoral, has diverse phenotypic characteristics, which have been little studied. The main objective of this research was to characterize in situ the morphological variability of 60 accessions of soursop. The morphological traits were evaluated using 20 quantitative and 10 qualitative variables of the plant and the fruit. Multivariate statistical methods were used as principal components, hierarchical conglomerate aggregation, discriminant and correlation analysis (Pearson) were performed. Descriptive analysis such as central tendency and dispersion (coefficient of variation, range, mean and standard deviation) were determined for the quantitative data; while frequencies were calculated for qualitative data. In terms of morphological traits, 74 % of the total variability was explained by the fourth component. Three conglomerates of similarity were formed, in which the height, diameter of canopy and fruit number per tree, were the characters of greater contribution for its conformation.

ACS Style

Ricardo Gonzalo Moreira Macías; Héctor Rodríguez; Eduardo Héctor-Ardisana; Carlos Feicán-Mejía; Saúl Anibal Mestanza Velasco; William Viera Arroyo. In situ morphological characterization of soursop (Annona muricata L.) plants in Manabí, Ecuador. Enfoque UTE 2020, 11, 58 -70.

AMA Style

Ricardo Gonzalo Moreira Macías, Héctor Rodríguez, Eduardo Héctor-Ardisana, Carlos Feicán-Mejía, Saúl Anibal Mestanza Velasco, William Viera Arroyo. In situ morphological characterization of soursop (Annona muricata L.) plants in Manabí, Ecuador. Enfoque UTE. 2020; 11 (2):58-70.

Chicago/Turabian Style

Ricardo Gonzalo Moreira Macías; Héctor Rodríguez; Eduardo Héctor-Ardisana; Carlos Feicán-Mejía; Saúl Anibal Mestanza Velasco; William Viera Arroyo. 2020. "In situ morphological characterization of soursop (Annona muricata L.) plants in Manabí, Ecuador." Enfoque UTE 11, no. 2: 58-70.

Journal article
Published: 01 April 2020 in Enfoque UTE
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El cultivo de mora de castilla (Rubus glaucus) es de mucha importancia para los agricultores ya que deben implementar prácticas culturales que permitan reducir el uso de pesticidas sintéticos. El objetivo de este estudio fue evaluar el efecto de diferentes alternativas tecnológicas para el control de Botrytis sp. en el cultivo de mora de castilla. Los tratamientos fueron 1: Testigo absoluto (silwet + agua), 2: Fungicida tradicional sintético (Carbendazim), 3: Extracto de mirtáceas (Iridium®), 4: Metabolitos bacterianos (Balus®) y 5: Trichoderma spp. (Tricomix®). Las aplicaciones se realizaron cada 15 días para el producto sintético y cada 8 días los biológicos, orgánicos y el testigo. Se utilizó un diseño de bloques completamente al azar (DBCA) con 3 repeticiones y un total de 10 unidades experimentales. Las variables estudiadas del fruto fueron: incidencia de Botrytis sp. (%), rendimiento (g/parcela), peso (g), diámetro polar y ecuatorial (mm), firmeza (N), sólidos solubles totales (Brix), acidez (% ácido cítrico) y pH (log H+). Se realizó un análisis de varianza y prueba de Tukey al 5 %. A partir de un análisis de incidencia semanal, se identificó que Carbendazim, Trichoderma spp. y extracto mirtáceas tuvieron un control en la incidencia de Botrytis sp. en el fruto de mora de castilla.

ACS Style

Martin Jamed Acosta Ruales; William Fernando Viera; Trevor Jackson; Wilson Vásquez Castillo. Alternativas tecnológicas para el control de Botrytis sp. en mora de castilla (Rubus glaucus). Enfoque UTE 2020, 11, 11 -20.

AMA Style

Martin Jamed Acosta Ruales, William Fernando Viera, Trevor Jackson, Wilson Vásquez Castillo. Alternativas tecnológicas para el control de Botrytis sp. en mora de castilla (Rubus glaucus). Enfoque UTE. 2020; 11 (2):11-20.

Chicago/Turabian Style

Martin Jamed Acosta Ruales; William Fernando Viera; Trevor Jackson; Wilson Vásquez Castillo. 2020. "Alternativas tecnológicas para el control de Botrytis sp. en mora de castilla (Rubus glaucus)." Enfoque UTE 11, no. 2: 11-20.

Short communication
Published: 06 February 2020 in International Journal of Tropical Insect Science
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The fruit borer, Neoleucinodes elegantalis (Guenée 1854) is the main pest infesting naranjilla crop (Solanum quitoense) in Ecuador, causing up to 70% loss of production. This research describes the biology of this insect in a laboratory environment simulating the subtropical environment of the Amazonian Andes (average temperature of 24 ± 1 °C and relative humidity of 85%). Adult insects were sexed, a population created with a ratio of two males for each female and larvae were reared in unripe naranjilla fruits. Eggs were placed on the fruit in masses of 3 to 15 units. Five larval instars were confirmed according to width of the cephalic capsules with a total larval duration of 20.4 ± 0.13 days. The pupal stage lasted 13.02 ± 0.35 days. Male adults had longevity of 10.06 ± 1.75 days and females 10.86 ± 1.30 days. Finally, pre-oviposition period lasted 2.67 ± 0.72 days, oviposition 4.33 ± 1.90 days and post-oviposition 3.87 ± 1.13 days.

ACS Style

Michelle Noboa; William Viera. Biology of Neoleucinodes elegantalis (Guenée 1854) (Lepidoptera: Crambidae): pest of economic importance of naranjilla, an Amazonian fruit of Ecuador. International Journal of Tropical Insect Science 2020, 40, 717 -722.

AMA Style

Michelle Noboa, William Viera. Biology of Neoleucinodes elegantalis (Guenée 1854) (Lepidoptera: Crambidae): pest of economic importance of naranjilla, an Amazonian fruit of Ecuador. International Journal of Tropical Insect Science. 2020; 40 (3):717-722.

Chicago/Turabian Style

Michelle Noboa; William Viera. 2020. "Biology of Neoleucinodes elegantalis (Guenée 1854) (Lepidoptera: Crambidae): pest of economic importance of naranjilla, an Amazonian fruit of Ecuador." International Journal of Tropical Insect Science 40, no. 3: 717-722.

Disease note
Published: 18 December 2019 in Journal of Plant Pathology
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ACS Style

Karla Ramos; Yeturu Sivaprasad; Fiama Guevara; Francisco Ochoa-Corona; William Viera; Francisco Flores. Occurrence of potato yellowing virus in naranjilla (Solanum quitoense Lam.) in Ecuador. Journal of Plant Pathology 2019, 102, 597 -597.

AMA Style

Karla Ramos, Yeturu Sivaprasad, Fiama Guevara, Francisco Ochoa-Corona, William Viera, Francisco Flores. Occurrence of potato yellowing virus in naranjilla (Solanum quitoense Lam.) in Ecuador. Journal of Plant Pathology. 2019; 102 (2):597-597.

Chicago/Turabian Style

Karla Ramos; Yeturu Sivaprasad; Fiama Guevara; Francisco Ochoa-Corona; William Viera; Francisco Flores. 2019. "Occurrence of potato yellowing virus in naranjilla (Solanum quitoense Lam.) in Ecuador." Journal of Plant Pathology 102, no. 2: 597-597.

Journal article
Published: 14 November 2019 in Diversity
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Andean blackberry (Rubus glaucus Benth) plants from the provinces of Tungurahua and Bolivar (Ecuador) started showing symptoms of black foot disease since 2010. Wilted plants were sampled in both provinces from 2014 to 2017, and fungal isolates were obtained from tissues surrounding necrotic lesions in the cortex of the roots and crown. Based on morphological characteristics and DNA sequencing of histone 3 and the translation elongation factor 1α gene, isolates were identified as one of seven species, Ilyonectria vredehoekensis, Ilyonectria robusta, Ilyonectria venezuelensis, Ilyonectria europaea, Dactylonectria torresensis, or Dactylonectria novozelandica. Pathogenicity tests with isolates from each species, excluding I. europaea and D. novozelandica whose isolates were lost due to contamination, confirmed that the four species tested can produce black foot disease symptoms in Andean blackberry. This is the first report of Dactylonectria and Ilyonectria species causing black foot disease of Andean blackberry.

ACS Style

Jessica Sánchez; Paola Iturralde; Alma Koch; Cristina Tello; Dennis Martinez; Natasha Proaño; Anibal Martínez; William Viera; Ligia Ayala; Francisco Flores. Dactylonectria and Ilyonectria Species Causing Black Foot Disease of Andean Blackberry (Rubus Glaucus Benth) in Ecuador. Diversity 2019, 11, 218 .

AMA Style

Jessica Sánchez, Paola Iturralde, Alma Koch, Cristina Tello, Dennis Martinez, Natasha Proaño, Anibal Martínez, William Viera, Ligia Ayala, Francisco Flores. Dactylonectria and Ilyonectria Species Causing Black Foot Disease of Andean Blackberry (Rubus Glaucus Benth) in Ecuador. Diversity. 2019; 11 (11):218.

Chicago/Turabian Style

Jessica Sánchez; Paola Iturralde; Alma Koch; Cristina Tello; Dennis Martinez; Natasha Proaño; Anibal Martínez; William Viera; Ligia Ayala; Francisco Flores. 2019. "Dactylonectria and Ilyonectria Species Causing Black Foot Disease of Andean Blackberry (Rubus Glaucus Benth) in Ecuador." Diversity 11, no. 11: 218.

Journal article
Published: 01 May 2019 in Journal of the Selva Andina Biosphere
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ACS Style

Aníbal Arturo¹ Martínez-Salinas; Luis Alfredo Villacís-Aldáz; William Fernando¹ Viera-Arroyo; Rosendo Iván¹ Jacome Montesdeoca; Marta Cecilia³ Espín-Chico; Olguer Alfredo² León-Gordón; Rita² Santana-Mayorga. Evaluación de nuevas tecnologías de producción limpia de la mora de castilla (Rubus glaucusBenth), en la zona Andina de Ecuador, para un buen vivir de los fruticultores. Journal of the Selva Andina Biosphere 2019, 7, 63 -70.

AMA Style

Aníbal Arturo¹ Martínez-Salinas, Luis Alfredo Villacís-Aldáz, William Fernando¹ Viera-Arroyo, Rosendo Iván¹ Jacome Montesdeoca, Marta Cecilia³ Espín-Chico, Olguer Alfredo² León-Gordón, Rita² Santana-Mayorga. Evaluación de nuevas tecnologías de producción limpia de la mora de castilla (Rubus glaucusBenth), en la zona Andina de Ecuador, para un buen vivir de los fruticultores. Journal of the Selva Andina Biosphere. 2019; 7 (1):63-70.

Chicago/Turabian Style

Aníbal Arturo¹ Martínez-Salinas; Luis Alfredo Villacís-Aldáz; William Fernando¹ Viera-Arroyo; Rosendo Iván¹ Jacome Montesdeoca; Marta Cecilia³ Espín-Chico; Olguer Alfredo² León-Gordón; Rita² Santana-Mayorga. 2019. "Evaluación de nuevas tecnologías de producción limpia de la mora de castilla (Rubus glaucusBenth), en la zona Andina de Ecuador, para un buen vivir de los fruticultores." Journal of the Selva Andina Biosphere 7, no. 1: 63-70.

Journal article
Published: 30 March 2019 in Journal of the Korean Society of International Agriculture
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ACS Style

Andrea Sotomayor; Instituto Nacional De Investigaciones Agropecuarias (Iniap). Av. Interoceánica Km 15 Y Eloy Alfaro Programa De Fruticultura; Antonio Gonzáles; Kang Jin Cho; Alicia Villavicencio; Trevor Jackson; William Viera. Effect of the Application of Microorganisms on the Nutrient Absorption in Avocado (Persea americana Mill.) Seedlings. Journal of the Korean Society of International Agriculture 2019, 31, 17 -24.

AMA Style

Andrea Sotomayor, Instituto Nacional De Investigaciones Agropecuarias (Iniap). Av. Interoceánica Km 15 Y Eloy Alfaro Programa De Fruticultura, Antonio Gonzáles, Kang Jin Cho, Alicia Villavicencio, Trevor Jackson, William Viera. Effect of the Application of Microorganisms on the Nutrient Absorption in Avocado (Persea americana Mill.) Seedlings. Journal of the Korean Society of International Agriculture. 2019; 31 (1):17-24.

Chicago/Turabian Style

Andrea Sotomayor; Instituto Nacional De Investigaciones Agropecuarias (Iniap). Av. Interoceánica Km 15 Y Eloy Alfaro Programa De Fruticultura; Antonio Gonzáles; Kang Jin Cho; Alicia Villavicencio; Trevor Jackson; William Viera. 2019. "Effect of the Application of Microorganisms on the Nutrient Absorption in Avocado (Persea americana Mill.) Seedlings." Journal of the Korean Society of International Agriculture 31, no. 1: 17-24.

Journal article
Published: 21 December 2018 in Enfoque UTE
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El género Trichoderma y en menor grado Purpureocillium, han sido estudiados ampliamente por sus propiedades como microorganismos benéficos y su eficacia en el control de enfermedades. Sin embargo, la eficacia biológica, no es el único parámetro que se considera al momento de formular un microorganismo; la viabilidad, la pureza y la concentración en la formulación, son características importantes para asegurar el éxito en campo. El propósito de este estudio fue probar distintos tipos de formulaciones (gránulos, polvos, líquidos) registrar su comportamiento en el tiempo, utilizando las variables viabilidad, concentración y pureza para seleccionar las mejores formulaciones en función de estos parámetros. Como resultado se obtuvo que los bioformulados a base de T. asperellum presentaron mayor estabilidad durante el almacenamiento, siendo más estables las formulaciones sólidas secas en comparación con los productos líquidos. En los formulados para P. lilacinum, se observó que la presentación de polvos mojables mostró la concentración y la estabilidad más alta en el tiempo.

ACS Style

William Viera; Michelle Noboa; Johana Bermeo; Francisco Báez; Trevor Jackson. Parámetros de calidad de cuatro tipos de formulaciones a base de Trichoderma asperellum y Purpuricillium lilacinum. Enfoque UTE 2018, 9, 145 -153.

AMA Style

William Viera, Michelle Noboa, Johana Bermeo, Francisco Báez, Trevor Jackson. Parámetros de calidad de cuatro tipos de formulaciones a base de Trichoderma asperellum y Purpuricillium lilacinum. Enfoque UTE. 2018; 9 (4):145-153.

Chicago/Turabian Style

William Viera; Michelle Noboa; Johana Bermeo; Francisco Báez; Trevor Jackson. 2018. "Parámetros de calidad de cuatro tipos de formulaciones a base de Trichoderma asperellum y Purpuricillium lilacinum." Enfoque UTE 9, no. 4: 145-153.

Research article
Published: 29 October 2018 in New Zealand Journal of Crop and Horticultural Science
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There is a lack of data and information on mineral content in pear fruit and none on the genetic parameters related to these individual elements. The aim of this research was to report mineral composition of pear fruit and to determine the quantitative genetic parameters of mineral content in fruit from interspecific pear populations. There was a high genetic component involved in the accumulation of boron and aluminium in the fruit, with heritabilities of as much as 0.72. Iron had a positive genetic correlation with accumulation of zinc (0.72) and sulphur (0.71), while chromium had a negative correlation with nickel (−0.77), phosphorus (−0.70) and magnesium (−0.4) accumulation. Parents of the same origin (Asian or European) had similar estimated breeding values for total mineral content. Macro element mineral content of fruit was: 4% calcium, 13% phosphorus, 76% potassium, 5% magnesium and 2% sulphur and for micro element mineral content 39% boron, 12% iron, 8% zinc, 4% manganese, 7% copper, 0.4% chromium, 9% nickel and 21% aluminium.

ACS Style

William Viera; Christopher Winefield. Genetic parameters for fruit mineral content in an interspecific pear (Pyrus spp.) population. New Zealand Journal of Crop and Horticultural Science 2018, 47, 125 -141.

AMA Style

William Viera, Christopher Winefield. Genetic parameters for fruit mineral content in an interspecific pear (Pyrus spp.) population. New Zealand Journal of Crop and Horticultural Science. 2018; 47 (2):125-141.

Chicago/Turabian Style

William Viera; Christopher Winefield. 2018. "Genetic parameters for fruit mineral content in an interspecific pear (Pyrus spp.) population." New Zealand Journal of Crop and Horticultural Science 47, no. 2: 125-141.