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Parluhutan Siahaan
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Uji Patogenisitas Jamur Metarhizium rileyi (Farlow) Isolat Tomohon Terhadap Larva Ulat Grayak Spodoptera frugiperda (Lepidoptera: Noctuidae) Indry Angelia Mullo; Parluhutan Siahaan; Lalu Wahyudi
JURNAL BIOS LOGOS Vol. 12 No. 1 (2022): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.v12i1.35828

Abstract

The armyworm frugiperda (Spodoptera frugiperda) is one of the insect pests of the Order Lepidoptera that attacks corn plantations in Tomohon City. One of the efforts to control pests is the use of entomopathogens. This study aims to identify and analyze the pathogenicity of the entomopathogenic fungus Tomohon isolate against larvae S. frugiperda. This research was conducted in-vitro using experimental methods. Data were analyzed using probit analysis and Anova test at 95% level and the smallest significant difference test at 5% confidence level. The results showed that the entomopathogenic fungus that attacked the larvae of S. frugiperda was a species of Metarhizium rileyi. The mortality percentage of the treatment that killed the larvae the fastest until it reached an average mortality of 100%, namely spore density of 109 only took seven days after treatment (DAT). The LT50 value is 4 days, and the LC50 value is a concentration of 5.4. For the results of the analysis of the average mortality percentage of S. frugiperda carried out on four DAT using the ANOVA test, there were differences in the mortality of each treatment.Keywords: Metarhizium rileyi; entomopathogen; Spodoptera frugiperdaAbstrakUlat grayak frugiperda (Spodoptera frugiperda) merupakan salah satu hama serangga dari Ordo Lepidoptera yang menyerang perkebunan jagung di Kota Tomohon. Salah satu upaya untuk mengendalikan hama yaitu dengan pemanfaatan entomopatogen. Penelitian ini bertujuan untuk menganalisis patogenisitas jamur entomopatogen isolat Tomohon terhadap Larva S. frugiperda. Penelitian ini dilakukan secara in-vitro dengan menggunakan metode eksperimental. Data dianalisis menggunakan analisis probit dan uji Anava pada taraf 95% dan uji beda nyata terkecil pada taraf kepercayaan 5%. Hasil penelitian menunjukkan bahwa jamur entomopatogen yang menyerang larva S. frugiperda merupakan spesies Metarhizium rileyi. Persentase mortalitas perlakuan yang paling cepat mematikan larva hingga mencapai rata-rata mortalitas 100% yaitu kerapatan spora 109 konidium/ml hanya membutuhkan waktu tujuh hari setelah perlakuan (HSP). Nilai LT50 yaitu 4 hari, dan nilai LC50 yaitu konsentrasi 105,4 konidium/ml. Untuk hasil analisis rata-rata persentase mortalitas S. frugiperda pada empat HSP dengan menggunakan uji anava menunjukkan adanya perbedaan pada mortalitas tiap perlakuan.Kata Kunci: Metarhizium rileyi; entomopatogen; Spodoptera frugiperda
Status Kerentanan Wereng Batang Coklat (Nilaparvata lugens Stål.) terhadap Jamur Beauveria bassiana (Bals.) Vuil. yang Diisolasi dari Berbagai Inang Parluhutan Siahaan; Rowland Mangais
JURNAL BIOS LOGOS Vol. 12 No. 2 (2022): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.v12i2.42286

Abstract

The brown plant hopper (Nilaparvata lugens. Stål.) is a pest of crops, especially rice crops worldwide and has been a problem for a long time. One of the reasons for the explosion of N. lugens was that it had developed resistance as a result of the inability of pesticides to suppress the growth of these insect pests. Utilization of the entomopathogenic fungus Beauveria bassiana is one of the efforts to reduce the use of synthetic pesticides. This study aimed to measure the susceptibility status of the brown planthopper (N. lugens) to the fungus B. bassiana isolated from several host insects. This study used a completely randomized design, with two treatments, namely the type of host and the concentration of conidia. The results showed that the highest mortality of N. lugens was in the treatment of L. oratorius isolates with concentrations of 109 and 108, namely 40% and 39.3%, and the lowest was in the isolates of Jati sari with concentrations of 106, which was 22.7%. N. lugens was more susceptible to the fungus B. bassiana L. oratorius isolate with an RR value of 0.63 compared to P. pallicornis isolates which had an RR value of 0.93.Keywords: Nilaparvata lugens; Beauveria bassiana; Resistance ABSTRAK Serangga wereng coklat (Nilaparvata lugens. Stål.) merupakan hama pada tanaman, terutama pada tanaman padi di seluruh dunia dan telah menjadi masalah sejak lama. Ledakan N. lugens salah satunya karena telah mengalami resistensi sebagai akibat dari ketidakmampuan pestisida dalam menekan pertumbuhan dari serangga hama tersebut. Pemanfaatan jamur entomopatogen Beauveria bassiana menjadi salah satu upaya mengurangi penggunaan pestisida sintetik. Penelitian ini bertujuan untuk mengukur status kerentanan wereng batang coklat (N. lugens) terhadap jamur B. bassiana yang diisolasi dari beberapa serangga inang. Penelitian ini menggunakan rancangan acak lengkap, dengan dua perlakuan yaitu jenis inang dan konsentrasi konidia. Hasil penelitian menunjukkan mortalitas N. lugens tertinggi yaitu pada perlakuan isolat L. oratorius konsentrasi 109 dan 108 yaitu 40% dan 39,3% dan terendah pada isolat Jati sari konsentras 106 yaitu 22,7%. Hama N. lugens lebih rentan terhadap jamur B. bassiana isolat L. oratorius dengan nilai RR 0,63 dibandingan isolat P. pallicornis yang memiliki nilai RR 0,93.
Co-Authors Agustina M Tangapo Ai S Nio Ardelia Santoso Dwina Kristianti Franky R.D. Rengkung Indry Angelia Mullo Krista Sitorus Lalu Wahyudi Redsway T.D Maramis Rowland Mangais Saroyo Yunia E Banyo