Raquel Ushiña

Universidad Central del Ecuador (UCE), Facultad de ciencias agricolas, Alumna

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Address: Quito, Provincia de Pichincha, Ecuador

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Revista Corpoica Ciencia y Tecnología Agropecuaria

Corporacion colombiana de investigación agropecuaria

Márcio Lucas

Universidade Federal de Pernambuco

EDDO Hernandez

Universidad de Ciencias y Artes de Chiapas

Aroldo Cisneros

Instituto Politécnico Nacional

Kent Fjeld

Greg Douhan

Michael T Clegg

University of California, Irvine

Mary Arpaia

R. Kopittke

V. Doogan

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Avocado Production and Industrial Chain DIVERSITY OF AVOCADO (Persea americana Mill.) GERMPLASM FOR USE AS ROOTSTOCK

There is a great variability of avocado germplasm considered as cultivar 'National' (Mexican race... more There is a great variability of avocado germplasm considered as cultivar 'National' (Mexican race) in Ecuador because this fruit is cross-pollinated; however specific characteristics that they present to be considered as rootstock are unknown. The success of a good yield of this fruit in adult plants depends on the quality and health of the seedlings used for planting. In the nurseries of the Tumbaco Experimental Farm (INIAP), seeds of cultivar 'National' were obtained from the provinces of Pichincha and Imbabura and clustered in 16 groups based on their shape, color and size. The purpose of this research was selecting materials that show good traits to be used as rootstocks. The following variables were recorded: percentage of germination, plant height, caliber and root dry matter. It was observed that there was a slightly correlation (0.48) between the polar diameter of the fruit and seed, whereas it was not with the equatorial diameter; thus, there is not a direct relation in the size of both fruit and seed. On the other hand, the percentage of germination was in a range of 35 to 45 days after sowing. There were two groups (AP5 and AP7) with high percentages of germination and in less time (100 and 98% of germination in a time of 35 and 32 days respectively); while the later one was the material AP10 with 83% of germination in a time of 60 days. The material AP13 obtained the lowest percentage of germination (78%). About the variable plant height, the groups AP7 and AP12 were highlighted, with an average of 67.6 and 61.54 cm respectively. In relation to the caliber, groups AP12 and AI15 shared the same range of significance with 6.07 and 6.06 mm respectively; nevertheless the former reached this value in less time (136 days) while the latter it did in 146 days. In the root dry matter variable, there was no statistical difference between materials; however, the material AP12 was highlighted because it obtained the highest weight (30 g) in less time from germination (136 days). In addition, the group AP2 with a root dry matter of 40 g obtained in 154 days and AP7 with 32 g in 157 days were over the average dry matter value although they needed more time for growing. With this research, it can be concluded that there is great seed variability that is expressed in the phenotypic traits evaluated during the development of the seedlings. However, an individualized selection of the materials should be made based on favorable characteristics that determine the vigorous and rapid development of the seedling for later use as a rootstock. Additionally, further research is needed to determine the resistance/tolerance of these germplasm to the attack of soil pathogens such as Phytophtora cinnamomi and Fusarium sp.

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REVISTA, AGUACATE.pdf

Con la finalidad de evaluar frutos de aguacate nacional (Persea americana Mill) para la obtención... more Con la finalidad de evaluar frutos de aguacate nacional (Persea americana Mill) para la obtención de plantas injertas de la variedad Hass, se realizó la presente investigación en la Granja Experimental Tumbaco del INIAP; la cual consistió en evaluar dos métodos de desinfestación de sustrato, analizar dieciséis materiales de aguacate y analizar el porcentaje de prendimiento. Se utilizó un diseño de bloques completos al azar en parcela dividida. Las variables evaluadas fueron días a la germinación, % de germinación, altura, calibre y porcentaje de prendimiento. De acuerdo a estas variables, se determinó que el tipo de desinfección no influye en forma significativa en la obtención de plantas; siendo el tratamiento 28 (desinfestación química + material 12 Pichincha) el que obtuvo los mejores resultados en menor tiempo (41dias con: 97,5% germinación, 64.71cm altura, 6.24mm calibre y 91.2% plantas prendidas), definiéndolo como el material a utilizar para próximas investigaciones.

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bioinsecticida pulgon en zucchini tumbaco

comprobacion de propiedades biocidas de la cebollas, ajo eucalipto y otras plantas insecticidas y... more

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EVALUACION DE LA EFICIENCIA DE TRES ATRAYENTES PARA MOSCA DE LA FRUTA (Drosophila

The fruit fly is one of the causes of the greatest economic losses in agriculture. There are many... more The fruit fly is one of the causes of the greatest economic losses in agriculture. There are many fruit flies and all cause terrible damage; within species most damaging, is the fruit fly (Drosophila melanogaster M.) that attacks almost all kinds of fruits; and one of the fruits where most damage is in Durazno.

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Avocado Production and Industrial Chain DIVERSITY OF AVOCADO (Persea americana Mill.) GERMPLASM FOR USE AS ROOTSTOCK

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REVISTA, AGUACATE.pdf

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bioinsecticida pulgon en zucchini tumbaco

comprobacion de propiedades biocidas de la cebollas, ajo eucalipto y otras plantas insecticidas y... more

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EVALUACION DE LA EFICIENCIA DE TRES ATRAYENTES PARA MOSCA DE LA FRUTA (Drosophila

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