Uji Beberapa Dosis Minyak Daun Kemangi Ocimum basilicum Linnaeus sebagai Atraktan terhadap Bactrocera spp. pada Tanaman Cabai

Fruit flies, Bactrocera spp., are the primary pests on chili plants (Capsicum annuum Linnaeus). A safe and effective control uses traps combined with an attractant from basil leaf oil (Ocimum basilicum Linnaeus). This study aimed to determine the attractiveness of basil leaf oil against fruit flies at several different doses. This research was carried out in Organic Chemistry Laboratory STIFARM Padang, in Tabek Patah Tanah Datar area West Sumatra, and in the Pest Disease Observation and Development of Biological Agents Laboratory, Bukittinggi, West Sumatra, from June to August 2020. The treatment was in the form of different doses of basil leaf oil, which was 0,5 ml per trap, 1.0 ml per trap, 1.5 ml per trap, 2.0 ml per trap, and 2.5 ml per trap. The experiment used a completely randomized design with five treatments and three replications. This study found two species of fruit flies around chili plants, namely Bactrocera papayae and Bactrocera carambolae, which were dominated by male B. papayae. The traps containing 1.5 ml of basil leaf oil attracted the most fruit flies. Temperature and humidity significantly affect the abundance of individual fruit flies.

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Uji Efektifitas Ekstrak Daun Sirih Merah (Piper rocatum) Terhadap Bakteri Aeromonas hydrophila Secara In Vitro [ Effectines Of Leaves Extracts Red Betel (Piper crocatum) Againts Of Bacteria Aeromonas hydrophila In Vitro ]

Jurnal Ilmiah Perikanan dan Kelautan ◽

10.20473/jipk.v4i1.11584 ◽

2019 ◽

Vol 4 (1) ◽

pp. 59

Author(s):

Ratih Kusuma Wardani, Wahyu Tjahjaningsih, Boedi Setya Rahardja

Keyword(s):

Minimum Inhibitory Concentration ◽

Aeromonas Hydrophila ◽

Inhibitory Concentration ◽

Minimum Bactericidal Concentration ◽

Volatile Oil ◽

Chemistry Laboratory ◽

African Catfish ◽

Randomized Design ◽

Organic Chemistry Laboratory

Abstract Aeromonas hydrophila is a motile Aeromonas bacteria that cause Septicemia (MAS) or the disease kwon as red spots (Plumb, 1994). These bacteria attack the various types of freshwater fish such as African catfish, carp and prawns. Treatment of MAS is still a lot of use antibiotics, whereas antibiotic a lot side effects. This study tries for find an alternative use antibacterial substances using natural chemicals derived from medicinal plants of leaves extracs red betel (P. crocatum) which is antibacterial is a volatile oil, flavonoids, alkaloids and tannins. The purpose of this study was to determine the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of leaves extracts red betel (P. crocatum) against of bacteria A. hydrophila. The research was conducted on July-August 2011, at the faculty of veterinary medicine, Airlangga University and Organic Chemistry Laboratory Faculty Of science and Technology Airlangga University. The method used in this study is an experimental method, using completely randomized design (RAL) with 11 treatments and three replications. Variables observed in this study is the minimum inhibitory concentration (MIC) and Minimum Bactericidal Concentration (MBC) of leaves extracts red betel (P. crocatum). The observations were analyzed using analysis of variance (ANAVA). The results showed that extracts leaves red betel (P. crocatum) has efficacy against the bacteria A. hydrophila in vitro. Based on the results of MIC testing, leaves exracts of red betel (P. crocatum) inhibits growth of bacteria A. hydrophila at a concentration of 12,5% and based on test results of MBC, leaves extracs of red betel (P. crocatum) effectively kills the bacteria A. hydrophila at a concentration of 25%. It can be concluded that the concentration of antibacterial substances contained in red betel able to inhibit and kill bacteria A. hydrophila. This study recommends further to determine the effects of leaves extracts red betel (P. crocatum) A. hydrophila against bacteria in vitro, so that can know the effectiveness of leaves effects of leaves extracts red betel (P. crocatum) in suppressing populations of bacteria A. hydrophila

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DINAMIKA POPULASI LALAT BUAH (Diptera: Tephritidae) PADA TANAMAN BUAH-BUAHAN DI KABUPATEN DHARMASRAY

Agrin ◽

10.20884/1.agrin.2017.21.1.339 ◽

2017 ◽

Vol 21 (1) ◽

Author(s):

Sri Heriza

Keyword(s):

Key Words ◽

Fruit Fly ◽

Fruit Flies ◽

Fruit Tree ◽

Bactrocera Cucurbitae ◽

Fruit Crops ◽

Control Fruit ◽

Bactrocera Carambolae ◽

West Sumatra ◽

Fruit Plants

Kegiatan penelitian Dinamika Populasi Lalat Buah (Diptera: Tephritidae) Pada Tanaman Buah-Buahan DiKabupaten Dharmasraya ini telah dilakukan mulai pada tanggal 1Agustus 2016 sampai dengan tanggal 10November 2016 di Kabupaten Dharmasraya. Kegiatan penelitian ini adalah sebuah penelitian untuk memperkayapengetahuan mengenai lalat buah yang meliputi kesamaan, kelimpahan, dominansi lalat buah pada tanaman buahbuahandi Dharmasraya, dan dapat membantu dalam upaya pengendalian hama lalat buah pada tanaman buahbuahanyang dibudidayakan. Data penelitian diambil dari mengumpulkan buah busuk yang ada di pasar KabupatenDharmasraya dan trapping di sentra buah-buahan di Kabupaten Dharmasraya, Propinsi Sumatera Barat kemudiandibawa ke Laboratorium Entomologi Prodi Agroekoteknologi Fakultas Pertanian Kampus III Universitas AndalasDharmasraya untuk diidentifikasi. Dari hasil penelitian ini terlihat keragaman spesies lalat buah di pasar dan disentra buah-buahan di Kabupaten Dharmasraya sangat rendah dan di dominansi oleh spesies Bactroceracarambolae dan Bactrocera papayae, dan ditemukan 6 spesies lalat buah yang ada di lokasi pasar dan sentra buahbuahan di Kabupaten Dharmasraya yaitu Bactrocera papayae Drew & Hancock, Bactrocera carambolae Drew &Hancock, Bactrocera umbrosa Fabricius, Bactrocera cucurbitae Coquillete, Bactrocera caudata Fabricius danBactrocera albistrigata de Maijere (Diptera:Tephritidae).Kata Kunci: populasi, lalat buah, tanaman buahABSTRACTResearch activities Fruit Fly Dynamics Population (Diptera: Tephritidae) On Fruit Plants In DharmasrayaDistrict has been done starting on August 1st ,2016 until November 10th, 2016 at Dharmasraya District. Thisresearch activity are research to enrich the knowledge of fruit flies that include similarity, abundance, dominanceof fruit flies in fruit crops in Dharmasraya, and can help in the effort to control fruit fly pests on fruit tree. Datawere taken from collected rotten fruit on the market Dharmasraya and trapping in the center of fruits inDharmasraya Regency, West Sumatra Province and then taken to the Laboratory of Entomology Faculty ofAgriculture Campus III University of Andalas Dharmasraya will be identified. From the results of this study looksdiversity of species of fruit flies in the market and at the central fruit in Dharmasraya very low and in dominanceby species Bactrocera carambolae and Bactrocera papayae, and found six fruit fly species that exist in the marketplace and center for fruits in the District Dharmasraya namely Bactrocera papayae Drew & Hancock, Bactroceracarambolae Drew & Hancock, Bactrocera umbrosa Fabricius, Bactrocera cucurbitae Coquillete, Bactroceracaudata Fabricius and Bactrocera albistrigata de Maijere (Diptera: Tephritidae).Key words: Population, Fruit Flies, Fruit Crops

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TINGKAT KOLONISASI PERAKARAN BIBIT PISANG JANTAN YANG DIINOKULASI DENGAN BEBERAPA DOSIS INOKULAN FUNGI MIKORIZA ARBUSKULA SERTA LAMA PEMBERIAN FOSFAT

Jurnal Pelangi ◽

10.22202/jp.v6i2.294 ◽

2015 ◽

Vol 6 (2) ◽

Author(s):

Novi Novi ◽

Rizki Rizki

Keyword(s):

Root Colonization ◽

Environmental Preservation ◽

Technology Application ◽

Soil Microbial ◽

Randomized Design ◽

West Sumatra ◽

Two Factors ◽

Growth Quality ◽

Chemical Pesticides ◽

Different Doses

Male banana is one of the varieties of bananas that becomes a main commodity of West Sumatra. As a main commodity, then growth, quality and productivity need to be maintained and improved. Soil microbial technology application, such as the development of biological agents of Fungi Mycorrhizae Fungi (AMF), is one of the strategies need to be tested and developed to support the development of a national program of healthy banana seedlings as well as issues of pressing environmental preservation based fertilizers and chemical pesticides. This research was conducted at the Laboratory of Plant Physiology and tissue culture and greenhouse of Faculty of Agriculture, University of Andalas, Padang. This research used an experimental method arranged in a factorial completely-randomized design consisting of two factors with three replications. Factor A: Dose mycorrhizae (A0 = no inoculation, A1 = 5 g inoculant FMA PU10, A2 = 10 g inoculant FMA PU10, A3 = 15 g inoculant PU10, A4 = 20 g inoculant PU10. Factor B: Timing of phosphate (B0 = 0 HSI inoculant FMA PU10 B1 = 10 HSI inoculant FMA PU10, B2 = 20 HSI inoculant FMA PU10, B3 = 30 HSI inoculant FMA PU10, B4 = 40 HSI inoculant FMA PU10). The research shows that inoculation of inoculant FMA on different doses give a significant effect on the percentage of male banana seedling of root colonization. Where dosing 10 grams (A2) shows that the highest root colonization percentage compared with other treatments equals to 53. 33%. The provision of phosphate on 30th day of HSI Mycorrhizae shows that the highest percentage of colonization is 45.55%.

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Developing and Implementing a Specifications Grading System in an Organic Chemistry Laboratory Course

10.26434/chemrxiv.12276701.v2 ◽

2020 ◽

Author(s):

William J. Howitz ◽

Kate J. McKnelly ◽

Renee Link

Keyword(s):

Organic Chemistry ◽

Chemistry Laboratory ◽

Grading System ◽

Traditional Grading ◽

Final Grade ◽

Laboratory Courses ◽

Lower Division ◽

Collaborative Learning Environment ◽

Organic Chemistry Laboratory ◽

Grade Uncertainty

<p>Large, multi-section laboratory courses are particularly challenging when managing grading with as many as 35 teaching assistants (TAs). Traditional grading systems using point-based rubrics lead to significant variations in how individual TAs grade, which necessitates the use of curving across laboratory sections. Final grade uncertainty perpetuates student anxieties and disincentivizes a collaborative learning environment, so we adopted an alternative grading system, called specifications grading. In this system each student knows exactly what level of proficiency they must demonstrate to earn their desired course grade. Higher grades require demonstrating mastery of skills and content at defined higher levels. Each students’ grade is solely dependent on the work they produce rather than the performance of other students. We piloted specifications grading in the smaller, third quarter course of the lower division organic chemistry laboratory series held during a summer term. Open-ended questions were chosen to gather student and TA perceptions of the new grading system. TAs felt that the new grading system reduced the weekly grading time because it was less ambiguous. Responses from students about the nature of the grading system were mixed. Their perceptions indicate that initial buy-in and multiple reminders about the bigger picture of the grading system will be essential to the success of this grading system on a larger scale.</p>

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