Identifikasi Penyakit Layu dan Mematikan Ceratocystis pada Eukaliptus di Sumatera Selatan

Abstract

Pratama, R., Mefiyanto, E., Sidik, M., Febrian, M. T., Syagitha, S. A., Mayasari, J. W., Asyifa, T. S., Merti, Y. (2023). Wilting and deadly disease of ceratocystis on eucalyptus plants in South Sumatra. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-11 Tahun 2023, Palembang  21 Oktober 2023. (pp. 252-261).  Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).

Ceratocystis is a serious threat to industrial forest plants, especially Eucalyptus. The purpose of this research is to identify the attack of Ceratocystis sp. on eucalyptus plants in Ogan Komering Ilir Regency, South Sumatra. The method was carried out by taking samples of sick and healthy plants using a purposive sampling method. Samples were taken of 30 samples of diseased plants, then cut to 5x5 mm size and planted in MEA media. The results obtained, the severity of the Ceratocystis disease attack which was directly identified with an average score of 4 was indicated by the yellowing of the entire eucalyptus leaves and the plant died with a presentation of 71% -100%. Ceratocystis disease attack on eucalyptus shows characteristic symptoms in the form of light brown sunken spots around the surface, then these spots will expand and blacken and cause plant stems to become dry rot and the plants die. Ceratocystis disease is transmitted through root contact between healthy and diseased trees, stem or root wounds due to pruning of the trunk. So, the incidence rate of Ceratocystis sp. and the highest attack intensity was 7,208 in the EP77 clone and there were no disease attacks in the other clones. From this research, it is hoped that further research will be carried out regarding the identification of Ceratocystis sp. molecularly to obtain accurate data about this disease.