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All Journal HAYATI Journal of Biosciences Jurnal Agroekoteknologi Jurnal Perlindungan Tanaman Indonesia
Wawan Setiawan
Graduate Study Program Of Phytopathology, Faculty Of Agriculture, IPB University Jln. Raya Dramaga, Babakan Raya 3, Dramaga, Bogor, West Java 16680
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Biocontrol Activity, Mode of Action, and Colonization of Aureobasidium pullulans Dmg 30 DEP on Controlling Early Blight Disease on Tomato Plant Wawan Setiawan; Suryo Wiyono; Toga Pangihotan Napitupulu; Atit Kanti; Idris Idris; Masrukhin Masrukhin; Efi Toding Tondok; I Nyoman Sumerta; I Made Sudiana
HAYATI Journal of Biosciences Vol. 29 No. 3 (2022): May 2022
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.29.3.320-329

Abstract

We investigated the biocontrol activity of A. pullulans Dmg 30 DEP against Alternaria solani causal agent of early blight. Biocontrol activity was tested by the in vivo and ad planta. Biocontrol activity were tested by investigating the antibiosis capabilities with dual culture method, paper dish assay, two-compartment petri dish assay, and trapping and identification of volatile organic compounds (VOCs) with GC-MS. Lysis activity was examined by observing the clear zone formed by growing yeast on chitin agar and skim milk agar. The ability of hyperparasitism was assessed by the agar block method, and observed by light microscopy and scanning electron microscopy (SEM). The results showed that A. pullulans Dmg 30 DEP plays a role in the suppression of early blight disease at 106 cells/ml and 107 cells/ml yeast cell density. The mechanism involved in biocontrol activity is the production of VOCs, the production of chitinase and protease enzymes, the production of siderophore and hyperparasitism. The result shows that A. pullulans Dmg 30 DEP was colonizing the tomato leaves following the areole.
In Vitro Study of Action Mode of Rhodotorula minuta Dmg 16 BEP as Biocontrol Agents on Alternaria solani Wawan Setiawan; Suryo Wiyono; Efi Toding Tondok; Atit Kanti; I Made Sudiana
Jurnal Perlindungan Tanaman Indonesia Vol 24, No 1 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.43344

Abstract

Rhodotorula sp. is widely known as a biocontrol agent and is reported effective in controlling several diseases on crops. Rhodotorula minuta Dmg 16 BEP is an antagonist yeast from Indonesia which was effective in controlling various plant diseases. The objective of this research was to study the in vitro mode of action of R. minuta Dmg 16 BEP against Alternaria solani. The antibiosis ability of R. minuta Dmg 16 BEP to A. solani might be based on the activity of volatile compounds and not from its metabolites products. The growth of A. solani in paper disk assay and dual culture tests were not inhibited nor inhibitory zones  developed, whereas the inverse petridish test showed the growth inhibition of A. solani. The results of the chitinolytic activity test on chitin agar and proteolytic on skim milk agar showed that no clear zone was formed. R. minuta has a strong hyperparasitic ability according to the slide culture test as the yeast cells surrounded A. solani hyphae and caused damage to some parts of hyphae.
EFEKTIVITAS EKSTRAK DAUN SUREN (Toona sureni Merr.) DALAM PENGENDALIAN HAMA LALAT BUAH (Bactrocera dorsalis) PADA BUAH CABAI (Capsicum annuum L.) Ida Hodiyah; Elya Hartini; Diana Safitri; Wawan Setiawan
Jurnal Agroekoteknologi Vol 12, No 1 (2020)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v12i1.8767

Abstract

Bactrocera dorsalis is a very harmful pest for fruit and vegetable. Chemicalcontrol of these pests has raised another problem. The use of surian leaf extractcan be a good and environmentally friendly alternative control. This study aims to determine the effect of the administration of vegetable pesticides from suren leaf extract in the control of B. dorsalis on red chili. This research had been carried out at Siliwangi University and BBPOPT, Karawang in July to August 2019. This study used a Completely Randomized Design (CRD) with six replications. The concentration of suren leaf extract were : 0%, 0.025%, 0.05%, and 0.1%. The results showed that chili fruit extracts with the highest 0.1% consistently could reduce the number of larvae and the number of fruit attacked. The maincompounds contained in the surian leaf extract include 9,12-Octadecadienoic acid (Z, Z) -, phytol, acetate, phenol, 2-methyl-5- (1,2,2-trimethylcyclopentyl) -, (S) -, Cedren-13-ol, 8-, and 3,7,11,15-Tetramethyl-2-. These compounds were thought to be strong compounds that play a role in suppressing the number of larvae and the number of fruit attacked.
In Vitro Liquid Smoke Potential as Biopesticide on Major Oil Palm Diseases Setiawan, Wawan; Majid, Muhammad; Putri, Sekar Dian Permata; Tambunan, Van Basten; Wibowo, Cahyo Sri
Jurnal Perlindungan Tanaman Indonesia Vol 28, No 2 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.95130

Abstract

Liquid smoke is reported as an environmentally friendly pesticide that can effectively manage various crop pathogens. The antimicrobial effect of liquid smoke is believed to be due to its phenol, carbonyl, and organic acid content. The aim of this study was to examine the effect of five commercial liquid smoke at two concentration levels (1% and 2%) on the development of Ganoderma boninense and Curvularia sp. colonies in vitro. This experiment was carried out using a Completely Randomized Design (CRD) with 11 treatments (Control, A1%, B1% C1%, D1%, E1%, A2%, B2%, C2%, D2%, and E2%) and three repetitions. Results showed effects of 11 treatments on test pathogen colonies growth. Liquid smoke types B and C showed the best inhibition against Curvularia sp. and G. boninense. GC-MS analysis revealed that phenol compounds were the dominant compounds, ranging from 24.45% to 85.28%.
Co-Authors Atit Kanti Atit Kanti Diana Safitri Efi Toding Tondok Elya Hartini I Made Sudiana I Made Sudiana I Nyoman Sumerta IDA HODIYAH Idris Idris Masrukhin Masrukhin Muhammad Majid Putri, Sekar Dian Permata Suryo Wiyono Tambunan, Van Basten Toga Pangihotan Napitupulu Wibowo, Cahyo Sri