Analysis of Weed Vegetation on Paddy Rice (Oryza sativa) Plant in Koya Village, South Tondano District

Noviana Lazar, Orbanus Naharia, Marthy Taulu — Sun, 08 Dec 2024 00:00:00 +0000

Paddy Rice (Oryza sativa) is the main food commodity in Indonesia, because most of the Indonesian population's staple food is Paddy Rice. Demand for Paddy Rice continues to increase from time to time along with population growth. The aim of this research is to determine the types and control of weeds in lowland Paddy Rice plants (Oryza sativa). This research is a qualitative descriptive study using a survey method directly observing weeds in the Paddy Rice planting area in Koya village, South Tondano subdistrict. The results of research on the density, dominance, and frequency of weed types in lowland Paddy Rice plants in Koya Village, South Tondano District show that there are 4 types of weeds in lowland Paddy Rice plants in Koya Village, namely Panicum repens, Fimbristylis litotoralis, Cyperus rotundus, and Pistia stratiotes. P.repens is a grass weed, F.litoralis and C.rotundus are a weed, and P.stratiotes is a broadleaf weed. The type that has the highest relative density (KR) is P. repens, namely 3.33%, followed by F. litoratlis, namely 26.67%, and the lowest is C. rotundus and P. stratiotes, namely 20.0%. Relative Dominance Value The highest (DR) was found in the weed type P. stratiotes, namely 51.56%, then followed by C. rotundus, namely 19.27%, F. litoralis, namely 15.10%, and the lowest, P. repens, namely 14.06%. The highest relative frequency (FR) was in P. repens and C. rotundus, namely 33.33%, followed by F. litoralis, namely 22.22% and the lowest was P. stratiotes, namely 11.11%. Based on the research results, it can be concluded that there are 4 types of weeds in lowland Paddy Rice plants in Koya Village, South Tondano District with the highest weed dominance index value, namely P. stratiotes, namely 27.55787; Weed control can be done chemically, biologically, mechanically and physically.

Antibacterial Activity Of Sago Caterpillar Oil (Rhynchoporus bilineatus L.) From Minahasa Against Salmonella typhi and Staphylococcus aureus

Devis Christian Pua, Yermia Semuel Mokosuli, Harry Maurits Sumampouw — Sun, 08 Dec 2024 00:00:00 +0000

Sago caterpillars are ethnomedically used as food and medicine by the people of several tribes in Indonesia. Sago caterpillar oil contains active compounds, especially fatty acids that have antibacterial potential. Research has been carried out which aims to obtain the bioactive content of sago worm oil and the antibacterial activity of Salmonella typhi and Staphylococcus aureus bacteria. Sago caterpillars are obtained from the Minahasa region. Four to six instar sago caterpillars are used for oil isolation. Analysis of the content of sago worm oil using the Gas Chromatography Mass Spectrophotometry method. Meanwhile, the antibacterial test used the agar diffusion method using pure cultures of Salmonella thypii and Staphylococcus aureus. The results showed that the average sago caterpillar oil was 0.26 to 0.28 ml per head. The results of the antibacterial test showed the highest inhibition of S. aureus at a concentration of 1000 mg/L, namely 8.04 mm, while the inhibition of growth of S. thypii was highest at a concentration of 1000 mg/L, namely 7.69 mm. Sago caterpillar oil has antibacterial potential.

Indonesian Biodiversity Journal

Analysis of Weed Vegetation on Paddy Rice (Oryza sativa) Plant in Koya Village, South Tondano District

Antibacterial Activity Of Sago Caterpillar Oil (Rhynchoporus bilineatus L.) From Minahasa Against Salmonella typhi and Staphylococcus aureus