Identificación de microorganismos fungosos asociados a la enfermedad de marchitez vascular y pudrición de fuste de Gmelina arborea Roxb. (Melina) en la zona central del Tropico Húmedo Ecuatoriano.
In the Ecuadorian Humid Tropics, Melina plantations (Gmelina arborea Roxb) are being affected by a complex disease of vascular wilt and stem rot, with epidermal peculiarities, of which until now the causal agent (s) are not known. In the present investigation, it was proposed to describe the symptom...
-д хадгалсан:
| Үндсэн зохиолч: | |
|---|---|
| Формат: | bachelorThesis |
| Хэл сонгох: | spa |
| Хэвлэсэн: |
2019
|
| Нөхцлүүд: | |
| Онлайн хандалт: | http://repositorio.uteq.edu.ec/handle/43000/3757 |
| Шошгууд: |
Шошго нэмэх
Шошго байхгүй, Энэхүү баримтыг шошголох эхний хүн болох!
|
Шошго нэмэх | Тойм: | In the Ecuadorian Humid Tropics, Melina plantations (Gmelina arborea Roxb) are being affected by a complex disease of vascular wilt and stem rot, with epidermal peculiarities, of which until now the causal agent (s) are not known. In the present investigation, it was proposed to describe the symptomatology of the disease and to identify the phytopathogenic fungi associated with diseased trees in the Ecuadorian Humid Tropics by means of morphology. For its effect, two plots of 500 m2 were planted in two provinces (Los Ríos and Cotopaxi), three plantations of different ages (2, 3.5 and 5 years). The symptomatological description was made, the incidence and severity of the disease were evaluated using a scale of 5 categories. For each plot, 3 trees were dissected, whose tissues were taken to the laboratory, where 3 methodological strategies were used (wet chamber, carrot sandwiches and potato-destroyer-agar medium (PDA) to stimulate the expression of phytopathogens. Chlorosis, turgor loss, dry growth apices, epicormic sprouts in the stem and fulminating wilt were detected, and Ellis & Halst. Ceratocystis fimbriata and Fusarium species were identified consecutively with the three methodological strategies. of the disease was 18.0%, 7.9%, and 8.5% for the plantations of 2, 3.5 and 5 years respectively. The diseased trees in the plantation of 2 years were found in scales 2 to 5, while in the plantation of 3.5 years they were placed in category 2, in the most adult plantation it was in the scale 2 and 5 of evolution of the disease. Keywords: Ceratocystis fimbriata, Fusarium, incidence, severity |
|---|