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Oktavianus Lumban Tobing
Universitas Djuanda
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STUDI SERANGAN ANTRAKNOSA PADA PERTUMBUHAN CABAI MERAH (Capsicum annuum L.) SETELAH APLIKASI LARUTAN DAUN MIMBA DAN MOL BONGGOL PISANG Muhammad Hifniy Aziziy; Oktavianus Lumban Tobing; Yanyan Mulyaningsih
JURNAL AGRONIDA Vol. 6 No. 1 (2020)
Publisher : Universitas Djuanda Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.933 KB) | DOI: 10.30997/jag.v6i1.2668

Abstract

Antraknosa merupakan salah satu penyakit utama yang menyerang tanaman cabai merah (Capsicum annuum L.) sehingga dapat menurunkan produktivitas. Penggunaan fungisida nabati dan mikroorganisme dapat mengurangi persentase serangan antraknosa pada cabai merah tanpa menimbulkan dampak negatif terhadap lingkungan. Penelitian ini bertujuan yaitu untuk mengetahui potensi larutan daun mimba dan MOL bonggol pisang dengan dosis yang tepat dalam mengendalikan penyakit antraknosa serta meningkatkan pertumbuhan dan hasil pada tanaman cabai merah. Model penelitian yang digunakan yaitu Rancangan Acak Kelompok Faktorial yang terdiri atas dua faktor yaitu konsentrasi larutan daun mimba (0%, 15%, 30%, 45%) dan konsentrasi MOL bonggol pisang (0%, 15%, 30%, 45%). Hasil penelitian menunjukkan bahwa konsentrasi larutan daun mimba tidak memberikan pengaruh yang nyata terhadap semua peubah yang diamati. Konsentrasi larutan MOL bonggol pisang 45% berpengaruh nyata dalam meningkatkan tinggi tanaman, jumlah daun, jumlah cabang produktif dan bobot buah per tanaman dibandingkan dengan perlakuan kontrol, namun tidak berbeda nyata dibandingkan dengan konsentrasi 30%. Pada penelitian ini tidak terjadi serangan antraknosa terhadap semua tanaman yang diamati pada semua perlakuan, artinya persentase kejadian penyakit dan tingkat keparahan penyakit adalah 0%. Hal tersebut terjadi diduga karena faktor lingkungan yang tidak mendukung untuk perkembangan jamur Colletotrichum sp.
PENGARUH PEMBERIAN EKSTRAK GULMA Azolla pinnata DAN LAMA PERENDAMAN AIR KELAPA TERHADAP PERTUMBUHAN DAN HASIL KACANG TANAH Muhammad Rezky Dwiputra Pulungan; Oktavianus Lumban Tobing; Yanyan Mulyaningsih
JURNAL AGRONIDA Vol. 7 No. 1 (2021)
Publisher : Universitas Djuanda Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/jag.v7i1.3330

Abstract

Tujuan penelitian untuk memahami pengaruh pemberian ekstrak Azolla pinnata dan lama perendaman benih pada air kelapa terhadap pertumbuhan dan hasil tanaman kacang tanah. Percobaan menggunakan rancangan acak lengkap (RAL) faktorial. Dosis Azolla pinnata terdiri atas empat taraf: 0%, 1%, 1.5%, dan 2% masa media tanam (mmt). Lama perendaman benih dengan air kelapa terdiri atas empat taraf yaitu direndam selama 0 jam, 6 jam, 12 jam, dan 24 jam. Dosis pemberian Azolla pinnata pada media tanam dan lama perendaman benih dalam air kelapa memberikan pengaruh positif pada pertumbuhan tinggi tanaman, jumlah daun, luas daun, bobot segar dan kering tajuk, bobot segar akar, jumlah polong, persentase polong isi, dan jumlah bintil akar. Azolla pinnata dapat menjadi pupuk alternatif, dan air kelapa dapat berfungsi sebagai zat pengatur tumbuh alami.
The Effect of Concentration and Frequency of Neem Leaf Extract on Aphid Attacks on Chili Plants Oktavianus Lumban Tobing; Yanyan Mulyaningsih; Amida Dwi Safitri
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.329

Abstract

Aphids that attack red pepper plants cause yield loss. Applying neem leaf extract in the form of concentration and frequency of yield losses can be avoided. Neem leaf extract contains secondary metabolite compounds that can function as vegetable insecticides to suppress the level of aphid attacks on chili plants. Saponins, meliantriol, and azadirachtin have been known as active ingredients that act as insecticides with different mechanisms of action against aphids, such as saponins as stomach poisons and contact poisons, meliantriol as a repellent (repellent/repellent), and azadirachtin as an inhibitor of ecdysone hormones (hormones that play a role in the process of metamorphosis or molting or exoskeleton of aphids). The study aimed to determine the effect of concentration and frequency of neem leaf extract on the incidence and severity of chili aphid attacks as well as plant development. The proposed solution to overcome aphid attacks is administering neem leaf extract to red chili plants. The method uses a randomized trial design of factorial groups with two factors. The first factor is the concentration of neem leaf extract which consists of four levels, namely: S0 = 0% (100 ml of water or without neem leaf extract), S1 = 10% (10 ml of neem leaf extract + 90 ml of water), S2 = 30% (30 ml of neem leaf extract + 70 ml of water), and S3 = 50% (50 ml of neem leaf extract + 50 ml of water). The second factor is the frequency of giving neem leaf extract, which consists of four levels: M1 = age 8 HSPT, M2 = age 16 HSPT, M3 = age 24 HSPT, and M4 = age 32 HSPT. The findings of this study are that the frequency of giving neem leaf extract three times showed a real effect on the severity of aphid attacks at the age of 44 days after transplanting, and giving a 10% extract had a real effect on height, leaf area, number of flowers, header dry bobobt, and dry weight of chili plant roots. The results of this study conclude that the administration of neem leaf extract can suppress the severity of the attack of red chili plant aphids.
RESPON PERTUMBUHAN, HASIL, DAN KUALITAS BEBERAPA VARIETAS SELADA KERITING (Lactuca sativa L.) TERHADAP APLIKASI PUPUK CANGKANG TELUR Putri, Allisa Julia; Tobing, Oktavianus Lumban; Yuliawati, Yuliawati
JURNAL AGRONIDA Vol. 9 No. 1 (2023): Jurnal Agronida
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/jag.v9i1.10982

Abstract

Lettuce growth and production are influenced not only by cultivars but also by the environment and their interaction. Providing nutrition is part of cultivation techniques that can affect plant cultivars' growth, production and quality. Sources of plant nutrition can come from natural materials, one of which is eggshells. This research aimed to determine the effect of eggshell fertilizer on the growth, production and quality of several varieties of loose-leaf lettuce. The research was conducted from March to May 2022 in Gunung Putri, West Java. It was designed using a factorial, completely randomized design with three replications. Eggshell fertilizer consists of 5 levels, namely without eggshell fertilizer treatment, 50% recommendation (5 g per plant), 100% recommendation (10 g per plant), 150% recommendation (15 g per plant), and 200% recommendation (20 g per plant). Observed variables include growth, yield and quality characteristics. The Karina lettuce variety generally has superior growth and yield compared to the Kreibo variety but has relatively no differences from the New Grand Rapid variety. The Karina variety treated with eggshell fertilizer had a larger stem diameter than the one not treated with eggshell fertilizer. The Karina variety treated with eggshell fertilizer up to 200% has a higher dry weight and PTT content. The Karina variety, given the recommended 200% eggshell fertilizer, and the New Grand Rapid variety, given the recommended 100% eggshell fertilizer, produced the crispiest leaves. Eggshell fertilizer can potentially increase crop yields and quality, but further testing is needed to make it more optimal.  
Pengaruh Kultivar dan Berbagai Konsentrasi Rootone F terhadap Keberhasilan Setek Batang Bambu Jepang (Dracaena surculosa) Tobing, Oktavianus Lumban; Yulianti, Nani; Fuaadah, Fathiati
Agrikultura Vol 35, No 3 (2024): Desember, 2024
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrikultura.v35i3.55197

Abstract

Bambu jepang (Dracaena surculosa) adalah tanaman hias dengan bentuk batang seperti bambu dan memiliki corak daun indah yang umumnya diperbanyak melalui setek. Keberhasilan setek dapat didukung dengan pengaplikasian zat pengatur tumbuh (ZPT). Akan tetapi, perbedaan varietas tanaman seringkali memberikan respon berbeda terhadap ZPT. Penelitian ini bertujuan untuk mengetahui pengaruh kultivar dan berbagai konsentrasi Rootone F terhadap pertumbuhan setek batang bambu jepang (D. surculosa). Percobaan dilakukan menggunakan rancangan acak lengkap (RAL) faktorial yang terdiri atas dua faktor dengan tiga ulangan. Faktor pertama yaitu kultivar bambu jepang yang terdiri dari Godseffiana dan Florida beauty. Faktor kedua adalah konsentrasi Rootone F terdiri atas 4 taraf yaitu 0 mg/l, 200 mg/l, 400 mg/l, dan 600 mg/l. Hasilnya menunjukkan kultivar tanaman bambu jepang godseffina memberikan hasil pertumbuhan yang lebih baik pada semua peubah dibandingkan Florida beauty. Konsentrasi Rootone F 200 mg/l memberikan hasil lebih baik pada parameter persentase setek hidup, persentase setek bertunas, jumlah akar, panjang tunas, jumlah tunas, dan waktu muncul tunas tetapi tidak berbeda dengan konsentrasi Rootone F 400 mg/l dan 600 mg/l. Lebih lanjut terdapat interaksi antara jenis kultivar dan konsentrasi Rootone F pada parameter jumlah tunas.
Pengaruh urine sapi dan ekstrak tauge terhadap keberhasilan tumbuh setek batang melati (Jasminum sambac L.) Mulyaningsih, Yanyan; Tobing, Oktavianus Lumban; Sihombing, Zuena Silvani
JURNAL AGRONIDA Vol. 10 No. 2 (2024): Jurnal Agronida
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/jag.v10i2.14782

Abstract

Jasmine are generally propagated through stem cuttings. However, this method encounters several challenges, particularly the low ability of cuttings to develop roots. The success and growth of jasmine stem cuttings can be enhanced by applying natural plant growth regulators, such as cow urine and mung bean sprout extract. This study aimed to evaluate the effects of cow urine and mung bean sprout extract on the success rate and growth performance of jasmine stem cuttings. The experiment was conducted using a factorial completely randomized design (CRD) with three replications. The first factor was the concentration of cow urine at four levels: 0 mL/L, 10 mL/L, 20 mL/L, and 30 mL/L. The second factor was the concentration of mung bean sprout extract at four levels: 0%, 20%, 40%, and 60%. The results indicated that the application of cow urine at a concentration of 30 mL/L produced higher shoot length (5–8 WAP), number of shoots (7–8 WAP), and root length of jasmine stem cuttings compared to those without cow urine treatment. Moreover, the application of 40% mung bean sprout extract in combination with 30 mL/L cow urine resulted in significantly higher percentages of sprouted cuttings, surviving cuttings, and rooted cuttings compared to combinations with other cow urine treatments.
The Effect of Temperature and Concentration Edible Coating of Aloe Vera Gel (Aloe Vera L.) to The Shelf Life and Sensory of Tomatoes (Solanum lycopersicum L. cv Momotaro) Tobing, Oktavianus Lumban; Mulyaningsih, Yanyan; Aziz, Ferry Abdul
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 3 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i3.396

Abstract

Tomatoes (Solanum lycopersicum L. cv Momotaro) with a creeping growth or indeterminate type generally grown in the highlands have high economic value. Momotaro tomatoes were classified as climacteric fruits that are easily damaged after harvest. So, it is necessary to do low-temperature treatment and edible Aloe vera gel coating to extend shelf life and sensory. This research aims to determine the effect of low-temperature storage and the concentration of aloe vera gel edible coating, which can extend the shelf life and sensory of Momotaro tomatoes. This study used a complete randomized design of the nested pattern, with treatment edible coating aloe vera gel consisting of 3 concentrations, namely control treatment (without coating), concentration coating 50%, concentration coating 100% nested in temperatures 5°C, 10°C, 15°C, and room temperature (27°C). Conclusions from results showed that the temperature treatment of 10°C and the edible coating treatment of aloe vera gel with a concentration of 50% nested at 10°C, have better results in extending the shelf life and sensory of Momotaro tomatoes to more than 30 days because the maturity level of Momotaro tomatoes has not yet reached its chemical peak. The temperature treatment and concentration of aloe vera coating positively contribute to extending the shelf life and sensory of Momotaro tomatoes.
Co-Authors Abidin, Sulton Zainal Adimihardja, Sjarif Avitidjadi Amida Dwi Safitri Aziz, Ferry Abdul Fuaadah, Fathiati Indra Rohman Mutaqin Muhammad Agus Muljanto Muhammad Hifniy Aziziy Muhammad Rezky Dwiputra Pulungan Mutaqin, Indra Rohman Nani Yulianti Nur Rochman Nur Rochman Nur Rochman Nur Rochman Payumi Putri, Allisa Julia Raden Danuningrat Setyono Setyono Sihombing, Zuena Silvani Sjarif Avitidjadi Adimihardja Sulton Zainal Abidin Thomas Wagin Wagin, Thomas Yanyan Mulyaningsih Yuliawati