Incidencia y severidad de la enfermedas de marchitez vascular y muerte regresiva Tectona grandis L.f. en cuatro Provincia de la costa Ecuatoriana, año 2018.
The present investigation had as determine the incidence and severity of the disease of vascular wilt and regressive death of Tectona grandis L. f. (teak) in four provinces of the Litoral region of Ecuador at the level of plantations. The provinces in which this study was carried out were Los Ríos,...
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| Médium: | bachelorThesis |
| Jazyk: | spa |
| Vydáno: |
2018
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| Témata: | |
| On-line přístup: | http://repositorio.uteq.edu.ec/handle/43000/3037 |
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Přidat tag | Shrnutí: | The present investigation had as determine the incidence and severity of the disease of vascular wilt and regressive death of Tectona grandis L. f. (teak) in four provinces of the Litoral region of Ecuador at the level of plantations. The provinces in which this study was carried out were Los Ríos, Santo Domingo de los Tsáchilas, Esmeraldas and Guayas. Three haciendas were visited by province and three plots of 500 m2 were established, a census was carried out tree by tree, to determine the incidence and severity, a data collection card was used with an arbitrary scale of 5 categories, according to the visible morphological differences, to be compared with healthy trees. The symptoms were the loss of turgor of the leaves located at the ends of upper branches and therefore the loss of the photosynthetic area that generates the appearance of epicormic shoots in the shaft as a defense method. In the variable number of epicormic outbreaks among the plantations of the provinces studied, significant statistical differences were detected (P <0.05). Plantations in the province of Santo Domingo de los Tsáchilas had the highest number of shoots per tree, while the lowest number of outbreaks was detected in the province of Guayas, with 5.80 and 1.26 shoots respectively. The highest location height of epicormic shoots in affected trees was found in the province of Esmeraldas, and the lowest height in the province of Santo Domingo de los Tsáchilas, at 4.93 m and 2.46 m above ground level, respectively. Regarding the variables Incidence and Severity of the disease, no significant differences were found between the plantations of the provinces studied. |
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