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All Journal Jurnal Fitopatologi Indonesia JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Nahrisa Rahmadhani
Department Of Agrotechnology, Faculty Of Agriculture, Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Medicine & Pharmacology

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Spread of bacterial wilt disease on potato in three villages in Silimakuta District, Simalungun, North Sumatra, Indonesia Nahrisa Rahmadhani; Mukhtar Iskandar Pinem; Irda Safni
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 22 No. 2 (2022): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLAN
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.222162-167

Abstract

Bacterial wilt disease caused by Ralstonia syzygii subsp. indonesiensis is an important disease in potatoes. This disease is a soil-borne pathogen that is difficult to control and becomes an obstacle in potato production. This study aimed to determine the distribution of bacterial wilt disease in potatoes caused by R. syzygii subsp indonesiensis in three villages in Silimakuta District, Simalungun Regency, North Sumatra. This research was exploratory research that was conducted using a survey method by calculating the incidence of disease in potatoes in 9 locations from three villages. The results showed that the intensity of bacterial wilt occurred with different percentages of disease incidence. The highest disease incidence of 100% was in Sibangun Meriah Village Location 2 and the lowest disease incidence of 22,5% was in Saribu Dolok Village Location 1.
Pengaruh Bakteri Endofit Padi terhadap Penyakit Busuk Bulir Bakteri dan Pertumbuhan Tanaman Padi: Effects of Rice Endophytic Bacteria on Bacterial Grain Rot Disease and Rice Growth Rahmadhani, Nahrisa; Munif, Abdul; Nawangsih, Abdjad Asih
Jurnal Fitopatologi Indonesia Vol. 21 No. 1 (2025): Maret 2025
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14692/jfi.21.1.51-63

Abstract

Effects of Rice Endophytic Bacteria on Bacterial Grain Rot Disease and Rice Growth Bacterial grain rot disease, caused by Burkholderia glumae, is an important disease that can reduce rice yields and is a seed-borne disease. Biological control through biopriming using endophytic bacteria is an alternative disease control method that has been widely used in various crops. This study aimed to assess the potential of endophytic bacteria from six rice varieties using biopriming techniques in controlling B. glumae and their ability to stimulate rice growth. The research stages consisted of isolation and biosafety testing of endophytic bacteria with potential as biological agents, in vitro antagonism assay against B. glumae using the cross streak method, phytotoxicity assay of endophytic bacteria on rice seeds, selection of potential bacteria using the analytical hyphenation process (AHP) method, and examining the ability of biopriming to control B. glumae and its effect on rice vegetative growth. A total of 133 endophytic bacterial isolates were successfully isolated from six rice varieties, and 27 isolates met the biosafety test requirements. In vitro and in vivo assay showed that eight isolates exhibited antagonistic activity against B. glumae, and 25 isolates increased rice seed germination. Three isolates were selected based on AHP results, i.e. BBZN3, BBAR4, and AKPAT4. Of these three isolates, AKPAT4 was the best at increasing the vigor index and germination level of rice seeds, as well as suppressing disease incidence and severity.
Co-Authors Abdjad Asih Nawangsih ABDUL MUNIF Irda Safni Mukhtar Iskandar Pinem