Fungi Associated With Shboot Dieback of Podocarpus Falcatus
| dc.contributor.advisor | Gezahgne, Alemu (PhD) | |
| dc.contributor.advisor | Alemu, Tesfaye (PhD) | |
| dc.contributor.author | Yirgu, Abraham | |
| dc.date.accessioned | 2018-06-13T10:09:02Z | |
| dc.date.accessioned | 2023-11-09T04:21:13Z | |
| dc.date.available | 2018-06-13T10:09:02Z | |
| dc.date.available | 2023-11-09T04:21:13Z | |
| dc.date.issued | 2006-07 | |
| dc.description.abstract | In Ethiopia, information available on tree disease is limited and scanty. In the field survey conducted in Menagesha-Suba and Munesa-shashemene natural forests the shoot dieback was observed on Podocarplls falcalus. Symptoms were initially observed on leaves and two-three small circular brown spots were found at the vety tip of the leading shoot. Gradually the color of the leaves changes into yellow, and to light brown as the shoots die. This symptom of dieback was observed both on seedlings, sapling and mature trees. A study was conducted to understand which fungi was associated with shoot dieback. Isolation was made ii-om the symptomatic plant part. Culture and spore morphology was used to characterize the most common and frequently isolated fungi. Accordingly, it was understood that 3 isolates belong to Alternaria genus, 4 isolates that grouped into genus Phoma, 1 isolate to Pestalotiopsis and I isolate to genus Fusarium was found. Among these isolates of Alternaria, isolates Pf-24 and 32 seem to be close to A.alternala and the other one isolate Pf-53 seems to be close to A. arborescens. Two of the isolates in the Phoma, Pf-42 and Pf-22 seems to be related with P. exigI/a and the other one resemble P.leveillei. The other two isolates Pf-12 and 21 were unidentified. In the inoculation test all the four groups of fungi produced lesion only on wounded leaves. The importance of these fungi in relation with shoot dieback, however, needs further detailed investigation. As far as our knowledge is concerned this is the first report of shoot dieback on P falcatlls in the natural forest of Ethiopia. The impact of these diseases on Pfalcalus should get due attention in the management of P.filicallis forest in Ethiopia. KEY WORDS: Podocarplls filicatus, Alternaria species, Phoma species, Pestaloliopsis species, Fusarium species, Shoot dieback | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/689 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Podocarplls filicatus | en_US |
| dc.subject | Alternaria species | en_US |
| dc.subject | Phoma species | en_US |
| dc.subject | Pestaloliopsis species | en_US |
| dc.subject | Fusarium species | en_US |
| dc.subject | Shoot dieback | en_US |
| dc.title | Fungi Associated With Shboot Dieback of Podocarpus Falcatus | en_US |
| dc.type | Thesis | en_US |