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Journal : Jurnal Bios Logos

Uji Toksisitas Beberapa Fungisida Nabati terhadap Penyakit Layu Fusarium (Fusarium oxysporum) pada Tanaman Kentang (Solanum tuberosum L.) secara In Vitro (Toxicity Test of several Biofungicides in controlling Fusarium wilt (Fusarium oxysporum) in Potato Plants (Solanum tuberosum L.) by In Vitro) Dotulong, Ghea; Umboh, Stella; Pelealu, Johanis
JURNAL BIOS LOGOS Vol 9, No 2 (2019): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.9.2.2019.24746

Abstract

Uji Toksisitas Beberapa Fungisida Nabati terhadap Penyakit Layu Fusarium (Fusarium oxysporum) pada Tanaman Kentang (Solanum tuberosum L.) secara In Vitro (Toxicity Test of several Biofungicides in controlling Fusarium wilt (Fusarium oxysporum) in Potato Plants (Solanum tuberosum L.) by In Vitro) Ghea Dotulong1*), Stella Umboh1), Johanis Pelealu1), 1) Program Studi Biologi, FMIPA Universitas Sam Ratulangi, Manado 95115*Email korespondensi: dotulong.ghea@gmail.com Diterima 9 Juli 2019, diterima untuk dipublikasi 10 Agustus 2019 Abstrak Tanaman kentang (Solanum tuberosum L.) adalah salah satu tanaman hortikultura yang sering mengalami penurunan dari segi produksi dan produktivitasnya, akibat adanya serangan penyakit layu yang salah satunya disebabkan oleh Fusarium oxysporum. Tujuan penelitian ini adalah mengidentifikasi toksisitas beberapa fungisida nabati dalam mengendalikan penyakit Layu Fusarium (F. oxysporum) pada tanaman kentang (Solanum tuberosum L.) secara In Vitro. Metode Penelitian yang digunakan yaitu metode umpan beracun. Data dianalisis dengan Rancangan Acak Lengkap (RAL) dengan Analisis Varian (ANAVA) yang dilanjutkan dengan menggunakan metode BNT (Beda Nyata Terkecil). Hasil Penelitian, diperoleh nilai toksisitas fungisida nabati tertinggi yaitu pada ekstrak daun sirsak dengan nilai HR (69,44%), kategori berpengaruh, ditandai dengan diameter koloni 2,75 cm (100ppm) dan yang terendah toksisitasnya yaitu pada ekstrak daun jeruk purut dengan nilai HR (49,81%), kategori cukup berpengaruh ditandai dengan diameter koloni 3,75 cm (25ppm). Semakin tinggi konsentrasi yang diujikan maka semakin tinggi toksisitas dari fungisida nabati yang diberikan.Kata Kunci: fungisida nabati, Fusarium oxysporum, tanaman kentang, In Vitro Abstract Potato plants (Solanum tuberosum L.) is one of the horticulture plants which often decreases in terms of production and productivity, due to the attack of wilt, one of which is caused by Fusarium oxysporum. The purpose of this study was to determine the toxicity of several biofungicides in controlling Fusarium wilt (F. oxysporum) in potato plants (Solanum tuberosum L.) in Vitro. The research method used was the In Vitro method with the poison bait method. Data were analyzed by Completely Randomized Design with Variant Analysis (ANAVA), followed by the BNT method. The results showed that the highest biofungicide toxicity value was soursop leaf extract with HR values (69.44%), influential categories, characterized by colony diameter 2.75 cm (100ppm) and the lowest toxicity, namely in kaffir lime leaf extract with a value of HR (49.81%), quite influential category was characterized by colony diameter of 3.75 cm (25ppm). The higher the concentration tested, the higher the toxicity of the biofungicide given.Keywords: biofungicides, Fusarium oxysporum, Potato Plants, In Vitro. 
Kajian Morfologi Daluga (Cyrtosperma merkusii (Hassk.) Schott) di Kabupaten Kepulauan Sangihe, Sulawesi Utara (Study on the morphology of daluga (Cyrtosperma merkusii (Hassk.) Schott) in Sangihe Archipelago, North Sulawesi) Julianti, Eka; Simbala, Herny E.I.; Koneri, Roni; Pelealu, Johanis
JURNAL BIOS LOGOS Vol 2, No 2 (2012): JURNAL BIOSLOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.2.2.2012.1043

Abstract

ABSTRAK Penelitian ini bertujuan untuk mempelajari morfologi daluga di Kepulauan Sangihe dan korelasinya dengan kondisi iklim setempat. Penelitian ini dilakukan di tiga lokasi yang berbeda, yaitu Tamako, Manganitu Selatan dan Tatoareng. Hasil penelitian menunjukkan bahwa daluga tumbuh pada ketinggian 3-24 m di atas permukaan laut dengan suhu udara 26 – 38 oC, suhu air 25 – 30 oC, kelembaban relatif 33 – 70 %, pH 5-7 dan salinitas 5-10 ppm. Morfologi daluga berbeda di ketiga lokasi pengamatan. Perbedaan yang dimaksud mencakup panjang dan berat helaian daun, panjang tulang daun utama, basal kiri dan kanan, tebal tulang daun bagian pangkal, jarak tulang daun lateral dan lebar celah daun, panjang dan diameter tangkai daun, jumlah duri, lebar spatha, diameter spadix, panjang bunga betina, bunga jantan dan bunga mandul, serta diameter dan berat kormus. Suhu udara dan air berkorelasi negatif dengan diameter kormus, tetapi kelembaban berkorelasi positif dengan diameter kormus. pH berkorelasi negatif dengan berat helaian daun, salinitas berkorelasi negatif dengan lebar spatha, tetapi elevasi berkorelasi positif dengan lebar spatha. Kata kunci: daluga, kondisi iklim, morfologi ABSTRACT This research aimed to study daluga morphology in Sangihe Archipelago and the correlation of morphology and climate conditions. The research was conducted in  three different locations, i.e. Tamako, South Manganitu and Tatoareng. The result showed that daluga grew at 3 – 24 m above the sea level with the air temperature 26 – 38 oC, water temperature 25 – 30 oC, relative humidity 33 – 70 %, pH 5-7 and salinity 5 – 10 ppm. There are some morphological differences of daluga in Tamako district, South Manganitu and Tatoareng. These differences  included the length and weight of leaf blade, the length of the main leaf blade, left and right basal, the thickness of base blade, the distance between lateral blade and leaf sinus denuding, the length and diameter of petiole, number of spines, spatha width, spadix diameter, flowers length, diameter and weight of cormus. The temperature of air and water were negatively correlated with diameter cormus, but the humidity was positively correlated with the cormus diameter. pH was negatively correlated with the weight of leaf blade, the salinity was negatively correlated with the spatha width, but the elevation was positively correlated with the spatha width. Keywords: daluga, climate condition, morphology