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All Journal Jurnal Kawistara : Jurnal Ilmiah Sosial dan Humaniora Jurnal Penelitian Hutan dan Konservasi Alam Jurnal Perlindungan Tanaman Indonesia Jurnal Kawistara
Sumardi Sumardi
Fakultas Kehutanan Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Humanities Decision Sciences, Operations Research & Management Education Environmental Science Languange, Linguistic, Communication & Media Social Sciences

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Journal : Jurnal Perlindungan Tanaman Indonesia

 1 
Pengendalian Hayati Penyakit Akar Merah pada Akasia dengan Trichoderma S. M. Widyastuti; Sumardi Sumardi; A. Sulthoni; Harjono Harjono
Jurnal Perlindungan Tanaman Indonesia Vol 4, No 2 (1998)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9901

Abstract

The experiment was aimed to measure the distribution and intensity of root rot disease of Acacia spp. in the urban forest at the campus of Gadjah Mada University, to isolate and identify the causal organism and to select Trichoderma sp. as biological agent for controlling the disease. The pathogenicity of the causal organism was tested using Crotalaria juncea L. and trunk of A. mangium Willd. (10 cm diameter, 8 cm length) as indicator plant. The ability of Trichoderma sp. as antagonist was tested in vitro. It was concluded that the pathogen of the root rot disease was Ganoderma philippii. The pathogen attacked for species of Acacia spp. in the location namely A. auriculiformis, A. mangium, A. oraria, and A. crassicarpa. Of the total individual trees of those species in the campus, as much as 38.6%, 22.2%, and 66.7% were attacked by the root rot pathogen respectively. Of the 20 Trichoderma spp. isolate capable to inhibit the pathogen in vitro, three isolates were found as promising agents for biological control of the pathogen. The promising isolates were T. resei/T23, T. koningii/T1, and T. koningii/T16 with inhibition effectivity of 94.58%; 93.66%; and 91.76% respectively.
Efektivitas Trichoderma spp. sebagai Pengendali Hayati terhadap Tiga Patogen Tular Tanah pada Beberapa Jenis Tanaman Kehutanan S. M. Widyastuti; Sumardi Sumardi; P. Sumantoro
Jurnal Perlindungan Tanaman Indonesia Vol 7, No 2 (2001)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.10072

Abstract

The experiment was aimed to compare Trichoderma spp. with fungicides in the control of soil-borne pathogens and to evaluate the inhibitory effect of the fungicides on the activity of Trichoderma spp. The first objective was achieved by applying antagonistic test of three isolates of Trichoderma spp. and inhibitory growth test of fungicides both against soil-borne pathogens. The second objective was attained by growing Trichoderma spp. on growth medium containing four level of fungicides. The results showed that three isolates of Trichoderma were comparable to fungicides in their ability to inhibit root rot pathogens. T. koningii at a concentration of 103 spores/ml performed the same level of growth inhibition with that of 0.2 ppm captafol against Rigidoporus lignosus. T. reesei at a concentration of 104 spores/ml gave same inhibition effect with that of 25 ppm benomyl against Ganoderma sp., and T. harzianum at a concentration of 105 spores/ml had the same inhibition effect against Sclerotium rolfsii with captafol at a concentration of 20 ppm. The results also showed that fungicides could affect the activities of Trichoderma on the medium. Benomyl promoted the growth of T. reesei and T. harzianum at a concentration of 0.2 ppm while at a concentration of 20 ppm both of them could not grow.
Aktivitas Penghambatan Trichoderma spp. Formulasi terhadap Jamur Patogen Tular Tanah secara In vitro S. M. Widyastuti; Sumardi Sumardi; Irfa'i Irfa'i; H. H. Nurjanto
Jurnal Perlindungan Tanaman Indonesia Vol 8, No 1 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.10103

Abstract

The research was aimed to evaluate the growth of formulated conidia propagules of Trichoderma koningii, T. reesei and T. harzianum, which had been stored for 1 and 5 months and the inhibition activity against soil borne plant pathogenic fungi Rigidopous lignosus, Ganoderma sp., Fusarium sp., and Sclerotium rolfsii. The isolates were formulated in the forms of alginate bead, alginate-peat bead, and peat-lime powder. The results indicated that Trichoderma formulated stored at room temperature showed higher inhibition activity than that stored at 4oC. After 5 months in the storage, T. reesei in both bead and powder formula performed higher growth inhibition activity against soil borne pathogens than the other isolates tested. It was noted that all isolates performed temporary decreased growth inhibition activity against soil borne pathogens.
Perbaikan Kualitas Semai Tusam Pasca Sapih melalui Aplikasi Trichoderma Formulasi Pupuk Lambat Tersedia dan Substitusi Media Tumbuh S. M. Widyastuti; Sumardi Sumardi; N. Estikasari
Jurnal Perlindungan Tanaman Indonesia Vol 10, No 1 (2004)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12210

Abstract

The experiment was conducted based on damage developed on pine nursery, which killed pine seedlings at a significant number. The damage started on 4 month-aged seedlings indicated by yellowing of needle, followed by development of brown spots on the needle and subsequently could kill the transplanted seedlings. Application of formulated Trichoderma and slow released fertilizer was aimed to avoid the initial symptom, which was assumed due to nutrient deficiency and to control the subsequent infection and disease development. Substitution of composting materials and rice hull into regular growth medium as the main treatment resulted 4 combination treatments. The results indicated that despite all treatments showed significant effects, application of Trichoderma together with slow released fertilizer (PJTJ) on regular medium (medium IV) gave the highest growth increment performance and suppression of damage in seedlings.
Injuries on Seedlings Caused by Potential Weed in Tropical Rain Forest Regeneration Areas Sumardi Sumardi; S. M. Widyastuti
Jurnal Perlindungan Tanaman Indonesia Vol 6, No 1 (2000)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12393

Abstract

The experiment aimed to assess the injuries on Shorea seedlings caused by weed in artificial regeneration of tropical rain forest in Jambi. Four planting systems, strip nurse planting (using Acacia mangium, Paraserianthes falcataria and Gmelina arborea), line planting, gap planting and natural regeneration, were used. Seedling injuries were assessed based on part of seedling suppressed. Results indicated that Shorea seedling suffered from varying degrees of injuries, depending on weed species and part of the seedling suppressed. The dominance of weed and damage intensity were determined by the level of canopy opening on the planting systems. Ground cover dominated rapidly in open canopy, causing up to 55.27% injuries on the seedlings in the strips of G. arborea and P. falcataria. Whereas creepers and vines became dominant in moderate canopy opening. The injury of Shorea seedling planted under nurse tree was determined by the species and planting density of nurse tree used. Light canopy nurse tree such as P. falcataria failed to suppress ground weed, but in the contrary, A. mangium with heavy canopy still allowed creepers and vines to grow.
Co-Authors A. Sulthoni Budiman Achmad Djoko Marsono H. H. Nurjanto Harjono Harjono Irfa'i Irfa'i Isamu Yamada N. Estikasari P. Sumantoro Ris Hadi Purwanto S. M. Widyastuti S. M. Widyastuti Sambas Sabarnurdin Tri Mulyaningsih