Características agronómicas y sanidad de germoplasma promisorio de maní (Arachis hypogaea L.) en Quevedo, Ecuador

Garcés-Fiallos, Felipe R.; Guamán-Anchundia, Robinson Eliécer; Bozada-Véliz, Jonis Jahir; Díaz-Coronel, Gorki T.

doi:10.15446/acag.v63n4.43080

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…Por otro lado, son inferiores a las medias entre 2,35 y 3,06 t ha -1 , obtenidos por Vasconselos et al (2015) al evaluar ocho genotipos de porte erecto de maní en el Brasil y a las medias entre 2,73 y 3,24 t ha -1 de granos con cáscara reportados por Gomes et al (2007), al comparar el rendimiento de cuatro cultivares de maní de porte erecto, en ocho ambientes del estado de Pernambuco, Brasil. Sin embargo, son superiores a las medias encontradas en Ecuador por Garcés-Fiallos et al (2014) de 1,08 a 1,51 t ha -1 , al evaluar durante dos años agrícolas cuatro variedades de maní.…”

Section: Resultados Y Discusiónunclassified

“…Así mismo, es inferior al rendimiento de granos citado por Fachin et al (2014) con la variedad IAPAR 25 Tição, de porte erecto, en dos municipios del Estado de Paraná, Brasil, donde obtuvieron medias de 2,56 y 2,57 t ha -1 . Por otro lado, son superiores a las medias entre 1,08 y 1,58 t ha -1 de granos con cáscara obtenido por Garcés-Fiallos et al (2014), evaluando cuatro variedades de maní durante dos años agrícolas en Ecuador. La media obtenida con Tatu IAC (1,47 t ha -1 ), es inferior al citado por Gomes et al (2007), quienes evaluando varios genotipos de maní de porte erecto obtuvieron rendimiento para la variedad Tatu de 1,82 t ha -1 .…”

Section: Resultados Y Discusiónunclassified

“…Sin embargo, son inferiores a las medias entre 479,8 g y 740,1 g reportados por Fachin et al (2014) en su investigación con seis variedades de maní en el sistema de labranza convencional de suelo. Por su parte Garcés-Fiallos et al (2014) compararon la masa de mil semillas de cuatro variedades de maní, sin encontrar diferencias significativas para dicha característica, donde las medias estuvieron entre 510 y 550 g. Tabla 3. Medias del rendimiento (t ha -1 ) con cascara y sin cascara, porcentaje de cascara (%) y masa de mil granos (g) de variedades de maní en dos localidades del Chaco Central.…”

Section: Resultados Y Discusiónunclassified

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Agronomic performance from five semi erect bearing of peanut varieties in two locals of Chaco Central

et al. 2017

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Agronomic performance from five semi erect bearing of peanut varieties in two locals of Chaco Central

et al. 2017

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“…In the absence of diagrammatic scales for assessing the Cercospora leaf spot, disease severity was determined by estimating of leaf area affected, like the methodology employed by Garcés-Fiallos et al (2014).…”

Section: Study Area and Experimental Managementmentioning

confidence: 99%

Cercospora leaf spot management with nitrogenous fertilizers in cotton is dependent on the disease amount in the plant canopies

Parrales-Rodríguez,

Zambrano-Gavilanes,

Portalanza

et al. 2024

Sci. agropecu.

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The aim of this study was to examine the impact of both organic and inorganic nitrogen fertilizers on the intensity and epidemiological components of Cercospora leaf spot across three different canopies of cotton plants, specifically the variety DP ACALA 90, under field conditions. Fertilizers used in the study included bovine manure, Jatropha curcas seedcake, poultry manure, and urea (the latter serving as a control). These were applied at 20 days after plant emergence and then during the flowering stage until the total nitrogen (N) dose reached 50, 100, 150, or 200 kg N per hectare. The incidence and severity of the disease were assessed starting at the reproductive stage B1 (the first visible flower bud) across the lower, middle, and upper canopies of four cotton plants, with six evaluations conducted over time. To calculate the initial inoculum (Y0) and the disease progress rate (r), the Exponential, Gompertz, and Logistic models were employed based on temporal data. The study was designed as a randomized complete block with a 4x4 factorial arrangement (fertilizer type x dose), and mean comparisons were made using Tukey's test (p ≤ 0.05). It was found that disease intensity within each canopy level varied in response to the type of nitrogen source and the applied dose, with the severity of the disease (including the area under the disease progress curve) being particularly influenced. A significant interaction between the type of fertilizer and the dose regarding the intensity of Cercospora leaf spot was observed. The Exponential model most accurately depicted the disease's temporal progression. Notably, poultry manure and urea were the fertilizers that most adversely influenced the intensity and initial inoculum (Y0) of Cercospora leaf spot across the various canopies of the cotton plants. The findings suggest that the use of organic fertilizers in cotton cultivation could represent a viable sustainable management strategy.

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Características agronómicas y sanidad de germoplasma promisorio de maní (Arachis hypogaea L.) en Quevedo, Ecuador

Cited by 2 publications

References 12 publications

Agronomic performance from five semi erect bearing of peanut varieties in two locals of Chaco Central

Agronomic performance from five semi erect bearing of peanut varieties in two locals of Chaco Central

Cercospora leaf spot management with nitrogenous fertilizers in cotton is dependent on the disease amount in the plant canopies

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