Proceedings of the 3rd Warmadewa Research and Development Seminar, WARDS 2020, 21 December 2020, Denpasar-Bali, Indonesia

Research Article

Characterization of Blendok Disease (Botryodiplodia theobromae Pat.) on Pummelo (Citrus grandis L. Osbeck) in Bali

Download296 downloads
  • @INPROCEEDINGS{10.4108/eai.21-12-2020.2305827,
        author={Ida Bagus Komang Mahardika and Anak Agung Sagung Putri Risa Andriani and Luh Komang Sulasmini Mudra},
        title={Characterization of Blendok Disease (Botryodiplodia theobromae Pat.) on Pummelo (Citrus grandis L. Osbeck) in Bali},
        proceedings={Proceedings of the 3rd Warmadewa Research and Development Seminar, WARDS 2020, 21 December 2020, Denpasar-Bali, Indonesia},
        publisher={EAI},
        proceedings_a={WARDS},
        year={2021},
        month={4},
        keywords={citrus grandis l osbeck; blendok disease; botryodiplodia theobromae pat},
        doi={10.4108/eai.21-12-2020.2305827}
    }
    
  • Ida Bagus Komang Mahardika
    Anak Agung Sagung Putri Risa Andriani
    Luh Komang Sulasmini Mudra
    Year: 2021
    Characterization of Blendok Disease (Botryodiplodia theobromae Pat.) on Pummelo (Citrus grandis L. Osbeck) in Bali
    WARDS
    EAI
    DOI: 10.4108/eai.21-12-2020.2305827
Ida Bagus Komang Mahardika1,*, Anak Agung Sagung Putri Risa Andriani1, Luh Komang Sulasmini Mudra1
  • 1: Universitas Warmadewa, Denpasar-Bali, Indonesia
*Contact email: gusmahardika62@gmail.com

Abstract

Pummelo in Balinese speaking is called Jerungga, Jeruti, Muntis, Juuk Saba, Juuk Bona or Juuk Gede. Morphologically and genetically, pummelo in Bali is known to be 5 (five) types of cultivars. The main cause of the decline in the population of pummelo plants in Bali is due to infection with blendok disease caused by the fungus Botryodiplodia theobromae Path. Characterization of the pathogen causing blendok disease is needed to determine the characteristics and pathogenicity of the fungus in pummelo plants. This is useful for determining how to control it effectively. The results showed that the pathogen of blendok disease in Bali was the fungus Botryodiplodia theobromae which had a gray color in the early stages of growth. This fungus has a shape like cotton and has abundant air between the micelles. The conidium is oval, one insulated, dark in color and the exospores have pathways. On the first day, the area of B. theobromae colonies was 1.13 cm2. Furthermore, on the second day to the fifth day experienced a rapid growth rate that reached 75.46 cm2. Growth rate, the fungus B. theobromae grows faster than the control fungus which is often referred to as the biological agent Trichoderma atroviride and Gliocladium sp.