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Bambang Rahayu TP
Fakultas Pertanian Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry

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Pengendalian Nematoda Parasitik Tanaman secara Hayati dengan Bakteri Pasteuria penetrans: Inventarisasi, Pembiakan Massal, dan Uji Patogenisitas Isolat Bakteri Mulyadi Mulyadi; B. Triman; Bambang Rahayu TP
Jurnal Perlindungan Tanaman Indonesia Vol 1, No 1 (1995)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7711.067 KB) | DOI: 10.22146/jpti.9298

Abstract

The research on “Biological control of plant parasitic nematodes by nematophagous bacteria (Pasteuria penetrans)” was planned to be conducted within 3 years period, started in 1994/1995. In the first year research was done with the following objectives: 1) inventory on the isolates of P. penetrans, and 2) study on the mass production and pathogenicity test of P. penetrans. Survey of P. penetrans was done in the provinces of D.I. Yogyakarta, Central Java, East Java, and West Java. Soil and root samples were collected in this survey, plant parasitic nematodes were isolated using centrifugation and funnel and spray method. Mass production of P. penetrans was done with their host especially root-knot nematodes (Meloidogyne spp.). The bacterial infected nematodes were inoculated on tomato  planted on sterilized soil. Roots contain root-knot nematodes inhabiting spores of P. penetrans were used as inoculum source. The pathogenicity tests of the isolates were done using bioassay method and in the green house in Completely Randomized Design.The research results is as follows: 1) seventeesn isolates of P. penetrans were found in the survey, these isolates were pathogenic to root-knot nematodes, 2) mass production of P. penetrans was done with their host especially root-knot nematodes and 4) treatment with P. penetrans significantly reduced the root-gall caused by root-knot nematodes.
Kajian Bioekologi Pasteuria penetrans Mulyadi Mulyadi; B. Triman; Bambang Rahayu TP
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7627.048 KB) | DOI: 10.22146/jpti.9363

Abstract

In bioecological studies of P. penetrans, six experiments were done i.e. study the nematode hosts of P. penetrans; the effect of temperature, soil moisture, spores storage length, soil chemicals (compound  fertilizer, carbofuran, and mancozeb) and methods of application on the pathogenicity of P. penetrans. The research results are as follows:  (1) nematode hosts of P. penetrans are M. incognita, M. javanica, and M. graminicola; (2) temperature tested up to 100oC did not affect on the infectivity of P. penetrans; (3) the highest infectivity of P. penetrans was found on soil moisture 45% than on 0%-30%; (4) spores storage for one, two, and three year after effected the infectivity of P. penetrans; (5) treatment with carbofuran, mancozeb, and compound fertilizer did not affect on the infectivity of P. penetrans; and (6) the used of spores of P. penetrans in grounded tomato roots more effective than in soil and water suspension and more efficient than in soil.
Prevalensi Nematoda Parasit pada Pertanaman Pisang di Daerah Istimewa Yogyakarta Siwi Indarti; Bambang Rahayu TP; Siti Subandiyah; Lilis Indarti
Jurnal Perlindungan Tanaman Indonesia Vol 17, No 1 (2011)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (95.335 KB) | DOI: 10.22146/jpti.9397

Abstract

A study to determine the prevalence and distribution of plant parasitic nematodes associated with banana was undertaken in banana growing areas at four districts (Bantul, Gunung Kidul, Kulon Progo, and Sleman) of Yogyakarta Special Province. Seven genera of plant parasitic nematodes were found on these area: Criconemoides, Helicotylenchus, Hoplolaimus, Meloidogyne, Pratylenchus, Radopholus, and Rotylenchulus. Genera Hoplolaimus and Meloidogyne were distributed at all districts and occurring in soil and root samples of banana cultivars, Ambon, Kepok, Koja, Klutuk, Raja, Tanduk, and Uter, respectively. Four genera, Hoplolaimus, Meloidogyne, Pratylenchus, and Radopholus were dominant and were found with high level of population than the others on each district. Pratylenchus mostly was found on banana cv Kepok with average population 348,2–2057,3 nematodes on total samples of 5g banana root and 100g soil.
Kajian Histopatologi Serangan Pratylenchus spp. pada Akar Pisang Kultivar Kepok Siwi Indarti; Bambang Rahayu TP
Jurnal Perlindungan Tanaman Indonesia Vol 4, No 2 (1998)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7481.426 KB) | DOI: 10.22146/jpti.9905

Abstract

The root lesion nematode, Pratylenchus spp., were found infecting banana. The objective of this study was to investigate the damage and malformation on root tissues caused by these nematodes. The nematode inoculum was collected from roots of cultivar Kepok contained high population of Pratylenchus spp. Banana cv. Kepok were inoculated with 1000 nematodes as inoculum level per plant per pot for histopathological study. Pratylenchus spp. infected the root of Banana cv. Kepok and caused black necrotic lesions on the root surface. The exoderm, epiderm, and cortical tissue of the roots showed severe damage with necrotic cells or lesion. Especially on the cortex the burrowings were observed.
Kemampuan Isolataktinomisetes Menghasilkan Enzim yang Dapatmerusak Kulit Telur Nematoda Puru-Akar Meloidogyne spp. Bambang Rahayu TP; Donny Widianto; Sebastian Margino; Mulyadi Mulyadi
Jurnal Perlindungan Tanaman Indonesia Vol 15, No 1 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11762

Abstract

Soil microbes including actinomycetes are known to produce various hydrolytic enzymes and antibiotics that can be used as biological controlling agents nematode. Therefore, surveys conducted in several areas in Yogyakarta, Central Java and East Java, to search for actinomycetes with chitinolytic, proteolytic, and chitino-proteolytic activity. Isolation of Actinomycetes produced 84 isolates, and most was obtained from shrimp head waste (26 isolates). After the selection based on their ability to hydrolyze chitines and protein in the medium, those whith the highest chitin and protein hydrolysis activity, are consecutive PSJ 27, TL 8, and TL 10 isolates. Test results of crude enzyme produced by selected isolates against root-knot nematode eggshell, showed that the isolates that have chitino-proteolytic activity (TL 10), is a highly effective isolate in damage eggshell. There are three types of damage to the nematode eggs. In the young eggs, crude enzyme preparation causing damage on vitelline and chitin layers. In the older eggs, preparation of crude enzyme cause premature hatching.
Co-Authors B. Triman Donny Widianto Lilis Indarti Mulyadi Mulyadi Sebastian Margino Siwi Indarti Subandi