PENGARUH SERBUK DAUN SERAI (Cymbopogon nardus L.) SEBAGAI INSEKTISIDA ALAMI DALAM MENGUSIR HAMA KUTU BERAS (Tribolium castaneum L.)

2025-06-23T21:57:14+07:00

Rice weevil (Tribolium castaneum L.) infestation poses a serious threat that directly impacts food security and the economic welfare of farmers. Pest control is often carried out using conventional synthetic pesticides. However, the use of chemical pesticides causes various problems, such as environmental pollution and health risks to humans. Therefore, this study aims to evaluate the effect of different concentrations of natural extract from citronella (Cymbopogon nardus L.) leaves on the mortality rate of rice weevils as a more environmentally friendly pest control alternative. This research was conducted using an experimental method with a completely randomized design (CRD). Several concentrations of citronella leaf powder were tested on the population of Tribolium castaneum L., with treatments of 2 grams, 4 grams, and 6 grams, along with a control group without treatment. Data collection was performed using a structured observation checklist to record the number of rice weevil mortalities in each treatment. This technique allowed the researchers to systematically observe and measure the pest’s response to the treatments. The results showed that the application of citronella leaf powder at various concentrations did not have a significant effect on rice weevil mortality. Thus, it can be concluded that citronella leaf powder as a natural insecticide was not effective in controlling rice weevil infestations under the conditions of this study. Further research is needed to identify more effective dosages or application methods to utilize the potential of citronella as an alternative natural pesticide.

THE INFLUENCE OF SOIL TEXTURE TYPES ON LAND RESILIENCE TO DROUGHT IN SOUTH NIAS

2025-06-23T21:56:46+07:00

This study aims to analyze the influence of soil texture types on land resilience to drought in South Nias, with a focus on the soil's capacity to retain moisture during prolonged dry seasons. The collected data include soil texture types (sand, silt, clay, and loam) and physical soil properties that affect water retention. The results indicate that sandy soils have low water-holding capacity, making them highly vulnerable to drought. In contrast, clay soils, while having high water retention, often face poor drainage issues. Loamy soils, which are a mixture of sand, silt, and clay, demonstrate better drought resilience due to a balanced capacity for water retention and drainage. The study also highlights the importance of soil management strategies tailored to soil texture types to enhance land resilience to drought. These include mulching, drip irrigation, and increasing organic matter content. Based on these findings, the application of more effective soil conservation techniques is recommended to support sustainable agriculture in South Nias.

Jurnal Sapta Agrica

PENGARUH SERBUK DAUN SERAI (Cymbopogon nardus L.) SEBAGAI INSEKTISIDA ALAMI DALAM MENGUSIR HAMA KUTU BERAS (Tribolium castaneum L.)

THE INFLUENCE OF SOIL TEXTURE TYPES ON LAND RESILIENCE TO DROUGHT IN SOUTH NIAS