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All Journal Agrotrop : Journal on Agriculture Science International Journal of Biosciences and Biotechnology Jurnal Bali Membangun Bali
UTAMA, I WAYAN EKA KARYA
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Peranan Parasitoid dalam Mengendalikan Hama Puru Daun Eukalyptus (Eucalyptus urophylla S.T. Blake) di Bali Susila, I Wayan; Supartha, I Wayan; Adriyani, Ni Putu Erina Puspita; Utama, I Wayan Eka Karya; Yudha, I Kadek Wisma
Agrotrop : Journal on Agriculture Science Vol 14 No 1 (2024)
Publisher : Fakultas Pertanian Universitas Udayana

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Abstract

The Role of Parasitoids in Controlling Eucalyptus Gall Pests (Eucalyptus urophylla S.T. Blake) in Bali. Eucalyptus spp. is a plant native in Indonesia. Eucalyptus leaves are part of the plant that is harvested and used as industrial raw material. However, a gall attack on eucalyptus leaves resulted in the formation of galls, which resulted in decreased production in eucalyptus plants. Research on the role of parasitoids in controlling eucalyptus leaf weevil pests in Bali aims to determine the types of parasitoids that play a role in controlling eucalyptus leaf gall pests in Bali. This research consists of field research and laboratory research. Field research was carried out at eucalyptus planting centers in Bali. Laboratory research was carried out at the Integrated Pest and Plant Disease Management Laboratory, Agroecotechnology Study Program, Faculty of Agriculture, Udayana University. The research starts from April to October 2022. This research uses a survey method, sampling is carried out at eucalyptus planting locations in Bali. The results of the research found two types of insect pests that cause gall on eucalyptus plants in Bali, namely Ophelimus eucalypti and Ctenarytaina sp., and there are four species of parasitoids that play a role in controlling it. The four parasitoids are Closterocerus chamaelon Girault (Eulophidae), Megastigmus sp (Torymidae), Erytoma sp, Illger (Eurytomidae) and Quadrastichus mendeli Kim & La Salle (Eulophidae), with parasitization rate of 9.70%, 6.25%, 3.02%, and 2.05% respectively. In total, the parasitization rate of the four parasitoids was 21.02%.
Identification and Antioxidant Activity Test of Strawberry Ethanol Extract Rosalinda and Osogrande (Fragaria x Ananassa) Varieties Enjelina, Ni Desak Gede Rista; Wijaya, I Nyoman; Suada, I Ketut; Phabiola, Trisna Agung; Utama, I Wayan Eka Karya; Yudha, I Kadek Wisma; Zhao, Tiejun
International Journal of Biosciences and Biotechnology Vol 11 No 1 (2023): International Journal of Biosciences and Biotechnology
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJBB.2023.v11.i01.p06

Abstract

Strawberries (Fragaria sp.) have many varieties spread across Indonesia. Pancasari Village, Buleleng is a strawberry producing area in Bali, there are several strawberry varieties cultivated by strawberry farmers in Bali, including the Rosalinda variety which has a sweet taste and the Osogrande has a sour taste. The purpose of this research is to determine the compounds contained in the fruits of these two varieties and to determine their antioxidant activity. Phytochemical analysis was performed using the GC-MS (Gas Chromatography-Mass Spectrometry) method, antioxidant activity was performed using the DPPH method. The results showed that the thick ethanol extract of (Fragaria x Ananassa) the Rosalinda and Osogrande varieties contained the same compound, namely 5-Hydroxymethylfurfural which has a function as an antioxidant, with 7 compounds that have known uses in the Rosalinda variety and 11 compounds in the Osogrande variety. The antioxidant activity of thick ethanol extract of the Rosalinda strawberry fruit is higher with IC50 of 10,05 ppm than the thick ethanol extract of Osogrande variety strawberry fruit with IC50 of 10,47 ppm, which means both are classified as having very strong antioxidant activity.
The Role of Egg Parasitoids to Control Rice Stem Borers (Scirpophaga incertulas) Walker (Lepidoptera: Pyralidae) in Subak Renon, Denpasar-Bali, Indonesia Yuliadhi, Ketut Ayu; Wijaya, I Nyoman; Costa Cruz, Latizio Beni Da; Yudha, I Kadek Wisma; Utama, I Wayan Eka Karya; Cha, Joo Young
International Journal of Biosciences and Biotechnology Vol 11 No 2 (2024): International Journal of Biosciences and Biotechnology
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJBB.2024.v11.i02.p02

Abstract

Rice stem borers are the main pest and endemic for the rice plants. The intensity of the attacks paneled fluctuating until it Reaches 90% and causes loss and it is requisite to get to pay serious attention. One of Efforts to Overcome it is the implementation of integrated pest management (IPM) through biological control by natural competitors. Research objectives is to know the role of an egg parasitoids in controlling rice yellow stem borer. Research conducted at Subak Renon, Renon Village, South Denpasar District, Denpasar Regency since April to July 2022. Research is done with the survey by truncate leaf rice containing eggs of rice stem borers at random. The sampling done every week since the plants were two weeks old in Ciherang rice plants. Identification of eggs parasitoids observed under microscope used the key determination insects (Kalshoven, 1981) and the percentage of eggs parasitoids is calculated by a formula Nishida and Torri (1970). The result showed that found three species of parasitoid eggs roomates played the role to suppress the development of yellow rice stem borer namely Trichogramma japonicum Ashm., Telenomus rowani Gahan and Tetrastichus schoenobii Ferr with parasitation capacity of 66%. The highest capacity parasitation played by T. japonicum, followed T. rowani and T. schoenobii Ferr.
Jeruk Keprok Tejakula: Potensi Pengembangan Berdasarkan Analisis Kesesuaian Lahan di Kecamatan Tejakula, Kabupaten Buleleng Trigunasih, Ni Made; Rai, I Nyoman; Wijaya, I Nyoman; Wijana, Gede; Wirya, Gusti Ngurah Alit Susanta; Widhianthini, Widhianthini; Yudha, I Kadek Wisma; Utama, I Wayan Eka Karya; Wiraatmaja, Wayan
Bali Membangun Bali: Jurnal Bappeda Litbang Vol 5 No 1 (2024): April 2024
Publisher : Badan Riset dan Inovasi Daerah Provinsi Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51172/jbmb.v5i1.328

Abstract

Tujuan: Penelitian yang dilakukan bekerja sama dengan Badan Riset Inovasi Daerah (Brida) Provinsi Bali ini bertujuan untuk mengetahui potensi pengembangan jeruk keprok Tejakula dan sebarannya berdasarkan analisis kesesuaian lahan aktual dan potensial serta arahan pengelolaan lahan, dalam rangka pengembangan jeruk keprok Tejakula. Metode penelitian: Penelitian dilaksanakan di Kecamatan Tejakula Kabupaten Buleleng mulai Mei 2023 sampai November 2023. Metode yang digunakan dalam penelitian ini adalah metode survei dan wawancara. Metode klasifikasi kesesuain lahan ditetapkan dengan cara mencocokkan (matching) data karakteristik/kualitas lahan dengan kriteria syarat tumbuh berdasarkan pedoman Ritung et al. Penilaian kesesuaian lahan dilakukan sampai pada tingkat unit. Hasil dan pembahasan: Hasil penelitian menunjukkan bahwa kelas kesesuaian lahan aktual untuk tanaman jeruk keprok Tejakula tergolong S3 (sesuai marginal) sampai N (tidak sesuai) dengan factor pembatas curah hujan, tekstur, bahan kasar, KTK, N-total, P-tersedia, lereng dan bahaya erosi. Faktor pembatas setelah diperbaiki maka didapatkan kesesuaian lahan potensial tergolong S1 (sangat sesuai) sampai S2 (cukup sesuai) dengan faktor pembatas tekstur tanah. Implikasi: Perbaikan kesesuaian lahan potensial dapat dilakukan dengan upaya perbaikan struktur tanah dengan penambahan pupuk organik. Arahan penggunaan lahan pada lokasi penelitian dengan mengatur waktu tanam, penambahan pupuk organik, pupuk Urea, Pupuk TSP/SP36 dan menerapkan teknik konservasi yaitu dengan terasering dan tanaman penguat teras.
Jeruk Keprok Tejakula: Potensi Pengembangan Berdasarkan Analisis Kesesuaian Lahan di Kecamatan Tejakula, Kabupaten Buleleng Trigunasih, Ni Made; Rai, I Nyoman; Wijaya, I Nyoman; Wijana, Gede; Wirya, Gusti Ngurah Alit Susanta; Widhianthini, Widhianthini; Yudha, I Kadek Wisma; Utama, I Wayan Eka Karya; Wiraatmaja, Wayan
Bali Membangun Bali: Jurnal Bappeda Litbang Vol 5 No 1 (2024): April 2024
Publisher : Badan Riset dan Inovasi Daerah Provinsi Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51172/jbmb.v5i1.328

Abstract

Tujuan: Penelitian yang dilakukan bekerja sama dengan Badan Riset Inovasi Daerah (Brida) Provinsi Bali ini bertujuan untuk mengetahui potensi pengembangan jeruk keprok Tejakula dan sebarannya berdasarkan analisis kesesuaian lahan aktual dan potensial serta arahan pengelolaan lahan, dalam rangka pengembangan jeruk keprok Tejakula. Metode penelitian: Penelitian dilaksanakan di Kecamatan Tejakula Kabupaten Buleleng mulai Mei 2023 sampai November 2023. Metode yang digunakan dalam penelitian ini adalah metode survei dan wawancara. Metode klasifikasi kesesuain lahan ditetapkan dengan cara mencocokkan (matching) data karakteristik/kualitas lahan dengan kriteria syarat tumbuh berdasarkan pedoman Ritung et al. Penilaian kesesuaian lahan dilakukan sampai pada tingkat unit. Hasil dan pembahasan: Hasil penelitian menunjukkan bahwa kelas kesesuaian lahan aktual untuk tanaman jeruk keprok Tejakula tergolong S3 (sesuai marginal) sampai N (tidak sesuai) dengan factor pembatas curah hujan, tekstur, bahan kasar, KTK, N-total, P-tersedia, lereng dan bahaya erosi. Faktor pembatas setelah diperbaiki maka didapatkan kesesuaian lahan potensial tergolong S1 (sangat sesuai) sampai S2 (cukup sesuai) dengan faktor pembatas tekstur tanah. Implikasi: Perbaikan kesesuaian lahan potensial dapat dilakukan dengan upaya perbaikan struktur tanah dengan penambahan pupuk organik. Arahan penggunaan lahan pada lokasi penelitian dengan mengatur waktu tanam, penambahan pupuk organik, pupuk Urea, Pupuk TSP/SP36 dan menerapkan teknik konservasi yaitu dengan terasering dan tanaman penguat teras.
Co-Authors Adriyani, Ni Putu Erina Puspita Cha, Joo Young Costa Cruz, Latizio Beni Da Enjelina, Ni Desak Gede Rista GEDE WIJANA Gusti Ngurah Alit Susanta Wirya I Ketut Suada I NYOMAN RAI I NYOMAN WIJAYA I Wayan Susila KETUT AYU YULIADHI NI MADE TRIGUNASIH TRISNA AGUNG PHABIOLA WIDHIANTHINI WIDHIANTHINI Wiraatmaja, Wayan YUDHA, I KADEK WISMA Zhao, Tiejun