Uji Patogenisitas Jamur Entomopatogen Hirsutella Citriformis, Beauveria Bassiana, Dan Metarhizium Anisopliae Secara Eka Dan Dwiinfeksi Untuk Mengendalikan Diaphorina Citri Kuw.

. Dwiastuti, M.E., W. Nawir, and S. Wuryantini. 2007. Pathogenicity Test of Entomopathogens of Hirsutella citriformis, Beauveria bassiana, Metarhizium anisopliae with Single and Double Infection to Control Diaphorina citri Kuw. The chemical control of D. citri, CVPD disease vector's was one of major method applied in the field, but it has several side effects, such as of insect resistance or environmental pollution. Control measures of D. citri by using biological agents have the potency to reduce insecticide application, especially the use of H. citriformis entomopathogen, besides M. anisopliae and B. bassiana, that were popular before. Several field pest observers indicated that natural infection of H. citriformis could accelerate the mortality of D. citri if combined with other entomopathogens. The objectives of this study was to measure entomopathogenicity of H. citriformis in controlling D. citri in combination with other entomopathogens. The research was conducted at the Micology Laboratory, Indonesian Citrus and Subtropic Fruit Research Institute and Jombang citrus farmer field. The treatments tested were H. citriformis, B. bassiana, M. anisopliae and their combination. The randomized block design with 3 replications was used in this experiment. The results showed that double infection of B. bassiana and H. citriformis was most sinergism than others treatments, which caused highest mortality of D. citri, followed by single infection of H. citriformis

Pengolahan Limbah Organik Dan Anorganik Sebagai Transmode Upaya Peningkatan Kreativitas Masyarakat Pantai Gondaria Pariaman

Upaya pelestarian dan pemeliharaan lingkungan agar terbebas dari limbah yaitu dengan cara pengolahan limbah dengan pola 3R. Konsep 3R mendorong masyarakat melakukan penanganan limbah dari sumbernya seperti pemilahan limbah dan pengemasan limbah dengan benar, mendorong penerapan konsep pemanfaatan sampah yang memiliki nilai ekonomi. Pengabdian Kepada Masyarakat dengan tema ”Berkarya Tanpa Batas” merupakan kegiatan pengolahan limbah organik dan limbah anorganik yang bertujuan untuk meningkatkan keterampilan dan kreatifitas masyarakat dalam penanganan limbah sehingga menambah wawasan masyarakat terhadap limbah yang dibuat dapat dijadikan kerajinan yang mempunyai nilai seni atau trash mode. Produk olahan sampah organik dan anorganik masyarakat terdiri dari tas dan bunga yang terbuat dari plastik. Sementara itu, kulit daun bawang putih diolah menjadi bunga. Pengolahan batok kelapa menjadi celengan, gelas, gantungan kunci, sendok, dan souvenir lainnya

Model of growth and mortality of otek fish (Netuma thalassina (Rüppell, 1837)) in Tarakan waters, North Kalimantan

Tarakan is rich in marine biological resources, including otek fish (Netuma thalassina), in the Juata waters and Mamburungan waters. Despite its abundance, this species is rarely used for consumption, primarily being processed into salted fish. Therefore, this study aimed to analyze the growth and mortality model of otek fish in Tarakan waters, North Kalimantan. Employing field surveys and quantitative descriptive methods, the investigation was conducted in Juata waters and Mamburungan waters. A sampling of otek fish was performed 12 times over 4 months from April to July 2023, with intervals of 2 weeks, in the sea and Mamburungan waters. Data collection comprised parameters such as sex, length, and weight of otek fish. The results showed that both male and female otek fish exhibited negative allometric growth, predominantly characterized by a thin body shape. While males demonstrated faster maximum length growth, females had swifter growth. The natural mortality value was higher among male fish, but total mortality, catch mortality, and exploitation rate were more pronounced in females. Additionally, mortality and exploitation rates were indicative of optimum exploitation

The diversity of insects in West Sumatera’s local rice by planting refugia as an effort to conserve natural enemies

Abstract Refugia cultivation refers to a place provided for insects in flower plants, especially for habituating the natural enemies of pests. The purpose of this research is to study the effect of refugia plants on insect diversity during rice cultivation, using a survey method. This experiment was conducted in the Solok area of West Sumatra, in July-September 2019, followed by insect identification at the Insect Bioecology Laboratory of the Department of Pests and Plant Diseases, Faculty of Agriculture, Andalas University. Furthermore, the observations were made in the paddy fields within the early generative phase, and when the panicle has emerged on each sample plot, using insect nets. These samples were taken from places with only refugia plants, as well as rice fields with and without refugia. The results showed a variation in the number of orders, families, and individuals in all samples, which were 3, 6 and 9, respectively for refugia plants, 6, 9 and 133, respectively on the edges of paddy fields with refugia plants, then 4, 7 and 213, were recorded in the areas without refugia. Besides, the highest insect diversity index value was identified in the rice plants with refugia at the edges of the fields [1.87]. At the same time, 1.39 was reported in its absence and 1.58 in areas with the refugia plant itself. Conversely, the dominance index values recorded were 0.20 and 0.58 for rice with, and without refugia, and 0 was reported in the area with refugia alone. Therefore, it is possibly concluded that refugia plants possess the capacity to influence insect diversity and dominance. This necessitates the conduction of further observations in the aspect of functions, as well as the ability to control rice pests.</jats:p