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All Journal SIMBIOSIS JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
SANG KETUT SUDIRGA
Lab. Struktur dan Perkembangan Hewan, **Lab. Fisiologi Tumbuhan Jurusan Biologi FMIPA Universitas Udayana
Agriculture, Biological Sciences & Forestry

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In vitro assessment of antifungal activity of cinnamon leaves extract against the Colletotrichum sp. causes of anthracnose on tomato Sudirga, Sang Ketut; Darmadi, Anak Agung Ketut; Wijaya, I Made Saka; Yulihastuti, Dwi Ariani
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 24 No. 2 (2024): 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.224284-294

Abstract

Tomato is a horticultural plant widely cultivated in Bali. Over the three years, the productivity and quality of this plant have tended to decrease due to pathogen-derived diseases, such as anthracnose caused by Colletotrichum sp. Until recently, control of this pathogenic fungus has relied on chemical-based fungicides, which lead to many long-term complications, including pathogen resistance, environmental pollution, the extinction of non-target microorganisms, and negative impacts on human health. Therefore, alternative methods for plant disease control are urgently needed to combat these pathogen attacks. The use of plant-derived active compounds has been intensively researched worldwide as a more environmentally friendly alternative. The main objective of this research was to investigate the effectiveness of Cinnamomum burmanii acetone extract in inhibiting the growth of Colletotrichum sp., the causative agent of anthracnose in tomatoes, through an in vitro approach. A non-factorial randomized complete design was applied in the experiment. The results showed that the crude extract of cinnamon leaves inhibited the growth of the Colletotrichum sp. with an MIC value of 0.9%, an inhibition zone of 2.55 mm, and an optimal inhibitory concentration of 2%, producing an inhibition zone of 11.10 mm. A GC-MS analysis was conducted to identify the active compounds in the cinnamon leaf extract. Sixteen active compounds were identified, nine of which are known to have antimicrobial activity.
DIVERSITY OF BIRD SPECIES IN THE NUSA DUA LAGOON AREA, BADUNG, BALI Rozi, Muhammad Fathur; Ginantra, I Ketut; Sudirga, Sang Ketut
SIMBIOSIS Vol 11 No 2 (2023)
Publisher : Jurusan Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2023.v11.i02.p01

Abstract

The Lagoon Indonesia Tourism Development Corporation (ITDC) area is a hotel waste management installation located in the Nusa Dua tourism area in the southern part of Bali that is surrounded by mangrove forests. This installation consists of five main ponds, pond 2B and 3 filled with tilapia fish as bioindicators, which attrach various types of birds to this area to forage or other activities. This study aims to determine the species and activities as well as the bird diversity index in the Lagoon area. This research was conducted from January to February 2022. Observations were conducted in the morning and afternoon with six counting points. The bird species encountered were recorded using the ten species recording method. Species identification were based on Mackinnon (2010). The tools used in this study were binoculars, a DSLR camera with a 70-300 mm lens and a Mackinnon field guide. The data obtained were analyzed using Microsoft excel. In this area, 45 species of birds were found with 6 protected species. Bird activities observed in this area include flying, preening, collecting nesting materials and foraging. Foraging activities were the most observed activity in the Lagoon Area. The bird diversity index at the Lagoon ITDC Nusa Dua area is 3.10977 which indicated high diversity, the distribution index is 0.81 which can be said to be almost evenly distributed and the dominance index is 0.087066 which indicate there is no dominant species in the area. The highest percentage of canopy use was observed on the forest floor or stems at 32.01%, and the lowest at 15.10% in the lower canopy.
Co-Authors Anak Agung Ketut Darmadi Dwi Ariani Yulihastuti I Ketut Ginantra Rozi, Muhammad Fathur Wijaya, I Made Saka