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All Journal E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology)
I MADE SUDARMA
Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana Jl. PB. Sudirman Denpasar 80362 Bali
Agriculture, Biological Sciences & Forestry

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Isolasi dan Identifikasi Rizobakteri dari Rizosfer Kacang Tanah dan Uji Efektivitasnya dalam Mengendalikan Penyakit Layu Fusarium pada Tanaman Tomat SOLICHATUN SOLICHATUN; KHAMDAN KHALIMI; I MADE SUDARMA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.2, No.4, Oktober 2013
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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ABSTRACT Isolation and Identification of Rhizobacteria from Peanut Rhizosphere to Control Fusarium Wilt on Tomato Tomato is one of the important horticultural in Indonesia. One obstacle in the cultivation of tomato is wilt disease caused by Fusarium oxysporum f.sp. lycopersici. Naturally soil microorganisms have the potential to suppress the development of pathogens in the soil. Population of microorganisms around rhizosphere is higher than not in rhizosphere both in quantity and quality. Legumes are known have positive effect to the microorganims in the soil due to rich N from root exudates.The purpose of this research is to determine the ability of rhizobacteria that were isolated from the rhizosphere of peanut in controlling F. oxysporum f.sp. lycopersici causes Fusarium wilt disease. Rhizobacteria as antagonist agent isolated from the rhizosphere of peanut from 3 places and tested against F. oxysporum f.sp. lycopersici in vitro and in vivo. Identification rhizobacteria with Oxoid Microbact GNB Kit.In this study, 61 isolates obtained from the rhizosphere of peanuts. However, only 4 isolates could inhibit Fusarium oxysporum f.sp. lycopersiciin vitro and only 2 isolates could identified certainly. One isolate identified as Klebsiella pneumoniae and one isolate as Stenotrophomonas maltophilia with percentage of probability above 90%. There needs to be more research on the stability of rhizobacteria in suppressing the occurance Fusarium wilt disease on tomato. Keywords: Tomato, Fusarium, and Rhizobacteria.
Identifikasi Jenis dan Populasi Jamur Tanah pada Habitat Tanaman Kubis (Brassica oleracea L.) Sehat dan Sakit Akar Gada pada Sentra Produksi Kubis di Kecamatan Baturiti Tabanan PANDE MADE INDRAYOGA; I MADE SUDARMA; NI MADE PUSPAWATI
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.2, No.3, Juli 2013
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

ABSTRACT Identify Types and Population of Soil Fungi on Cabbage (Brassicae oleracea L.) Health and Infected Habitat of Clubroot in Baturiti District, Tabanan Cabbage is a vegetable that potential to be developed, because a lot of people favored this vegetable. Cabbage crop production level is often affected by the attacks of pathogen Plasmodiophora brassicae that causes swelling at the root. This disease can reduce the production of cabbage plants up to 80%. The aim of this research is to investigate species variety and soil fungi population on healthy cabbage plant’s rizosphere (suppressive) and diseased cabbage or diseased sympton (conducive) of club root (Plasmodiophora brassicae), and also soil fungi which more dominant on isolation result of soil fungi, to investigate the relation of soil’s physico-chemistry nature with soil fungi population, and to investigate fungi species that able to antagonize P. Brassicae fungi. This research used 3 samples of soil which taken from both healthy and club root diseased cabbage plant’s rizosphere, where the soil’s sample taken from 3 locations, that are: Pekarangan, Baturiti Kaja, and Pacung. The result of this research shown that there are 17 species of soil fungi found on the sample of suppressive and conducivesoil in three locations, where the population of Fusarium sp. fungi becomes dominant soil fungi. This research also shown that on the relation between soil physico-chemistry nature and soil fungi population was not positively correlated, and species fungi of Trichoderma sp. is able to inhibit the growth of P. Brassicaefungi. Keywords: Cabbage plant, Plasmodiophorabrassicae, species and population of soil fungi, suppressive and conducive soil.
Co-Authors Khamdan Khalimi Ni Made Puspawati PANDE MADE INDRAYOGA SOLICHATUN SOLICHATUN