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Jurnal Perlindungan Tanaman Indonesia

jpti
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Published by Universitas Gadjah Mada

ISSN : 14101637 EISSN : 25484788 DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Arjuna Subject : -

Articles 509 Documents

5 6 7 8 9

Aktivitas Biologis Rimpang Kencur terhadap Lalat Buah Melon II. Bioaktivitas Ekstrak Metanol Rimpang Edhi Martono
Jurnal Perlindungan Tanaman Indonesia Vol 4, No 1 (1998)
Publisher : Universitas Gadjah Mada

Kumchura (Kaempferia galangal L.) rhizome has been known to posses bioactivity to melon fly in its crude form. Extract preparation from the same plant part was tested against melon fly Bactrocera cucurbitae Coquillet’s eggs and larvae to investigate its toxicity and activity. Toxicity test was done by diluting the rhizome’s methanolic extract and incorporating the solution to larval diet. Based on the toxicity test, sublethal concentrations were then tested to determine the extract activity to egg and larval survivals, larval stage duration, puparial weight and length, extracts’ repellency to larvae and extracts’ hormonal activity to larvae. The result showed that kumchura extract toxicity was only considered “slightly toxic”, but sublethal concentration as low as 0.3125% (to eggs) and 2.5% (to larvae) significantly affected the fly’s survival, while the same concentration to egg and 0.625% concentration to larvae significantly prolonged larval stage durations. Extracts’ repellency to larvae was siginificant in sublethal concentration as low as 0.3125%, but kumchura extract has no significant effect on puparial weight and length, and did not contain any hormonal activities toward melon fly.

Pengendalian Nematoda Puru Akar (Meloidogyne spp.) pada Buncis dengan Bakteri Pasteuria penetrans dan Solarisasi B. Triman; Mulyadi Mulyadi
Jurnal Perlindungan Tanaman Indonesia Vol 7, No 1 (2001)
Publisher : Universitas Gadjah Mada

The objectives of the research were to study the effect of P. penetrans and soil solarization on the population of root-knot nematodes (Meloidogyne spp.) and the effect of soil solarization on the infectivity of P. penetrans. The research was done in the field with high population of plant parasitic nematode especially root-knot nematodes. Soil solarization was done in dry season by covering the soil before french beans (buncis) were planted with transparent plastic and P. penetrans were inoculated before soil solarization. Factorial design in Completely Randomized Design was used in this experiment with the following factors: 1) soil solarization (within 1, 2, and 3 moths); 2) isolates of P. penetrans (i.e. isolate 2 and 3). The research results were: 1) Isolate 2 and 3 of P. penetrans were able to parasitize root-knot nematodes in soil solarized within 1, 2, and 3 months; 2) the length of soil solarization afected the infectivity of P. penetrans on Meloidogyne spp. The percentages of Meloidogyne spp. infected with isolate 2 of P. penetrans in soil solarization within 1, 2, and 3 months were 40.3%; 25.7%, and 10.1%, respectively, whereas in soil inoculated with isolate 3 of P. penetrans were: 37.3%, 10.2%, and 2.2%, respectively; 3) inoculation of P. penetrans reduced the root damage caused by root-knot nematodes (Meloidogyne spp.); and 4) treatment of P. penetrans combined with soil solarization reduced the root damage caused by root-knot nematodes (Meloidogyne spp.).

Ekstraksi DNA Phytophthora palmivora Isolat Kelapa Achmadi Priyatmojo; Siti Subandiyah
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Coconut isolate of Phytophthora palmivora DNA was extracted from sporangium and mycelium using SDS and Proteinase-K method. Sporangium and mycelium were harvested from liquid and solid culture of Potato Dextrose medium. The result of the study showed that the DNA extracted from sporangium and mycelium of 8 days solid culture was seen as distinct band. On the other hand, the dNA from sporangium and mycelium of 24 days old liquid culture was fragmented with smear band appearance.

Pengaruh Konsentrasi Subletal Deltametrin terhadap Nutrisi dan Pertumbuhan Tanaman Padi Yuni Ratna; Y. Andi Trisyono; Witjaksono Witjaksono; Didik Indradewa
Jurnal Perlindungan Tanaman Indonesia Vol 17, No 2 (2011)
Publisher : Universitas Gadjah Mada

Increasing the reproductive capacity through increasing plant growth and nutrition is one plausible mechanism of resurgence. This research was intended to determine the effect of deltamethrin on plant vigor and nutrition contents. The experiment was carried out outdoor. The treatments tested were deltamethrin (50 ppm), buprofezin (100 ppm), and control (water). Insecticide applications were applied one time (at age 26 d or 50 d) and two times (at age 26 and 50 d). Deltamethrin applications as many as two times did not increase the total chlorophyll and the photosynthesis rate, nutrients (total nitrogen, total protein, total sugar, total reducing sugar at aged 26 d, and sucrose), growth (plant height and number of tillers), and yield (number of panicles). However, application of deltamethrin at aged 26 d increased the amount of asparagine. Asparagine is known to be associated with the feeding rate of Nilaparvata lugens stimulation. Therefore, increasing level of asparagine after application of deltamethrin at sublethal concentration was considered as one of the factors that might be involved in the mechanism of N. lugens resurgence.Salah satu mekanisme resurjensi adalah peningkatan reproduksi hama melalui peningkatan nutrisi dan pertumbuhan tanaman. Penelitian ini dimaksudkan untuk melihat pengaruh deltametrin terhadap kandungan nutrisi dan vigor tanaman. Pengujian dilakukan di lapangan. Perlakuan yang diuji adalah deltametrin 50 ppm, buprofezin 100 ppm, dan kontrol (air). Aplikasi insektisida dilakukan satu kali masing-masing pada umur tanaman 26 dan 50 hst dan dua kali pada umur 26 dan 50 hst. Aplikasi deltametrin sebanyak dua kali tidak meningkatkan total klorofil dan laju fotosintesis, nutrisi (total nitrogen, total protein, total gula, total gula reduksi pada 26 hst, dan sukrosa) kecuali asparagin, pertumbuhan (tinggi tanaman dan jumlah anakan), dan hasil (jumlah malai) tanaman. Oleh karena asparagin berperan sebagai pemacu laju makan Nilaparvata lugens, maka peningkatan kadar asparagin tanaman setelah aplikasi konsentrasi subletal deltametrin diduga sebagai salah satu faktor yang terlibat dalam mekanisme resurjensi N. lugens

Dinamika Populasi Nephotettix virescens pada Dua Pola Tanam Padi Sawah I Nyoman Widiarta; Dede Kusdiaman; Andi Hasanuddin
Jurnal Perlindungan Tanaman Indonesia Vol 5, No 1 (1999)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9965

Planting pattern of irrigated rice in Indonesia can be categorized generally into consecutive rice-rice-rice and rice-rice-fallow/secondary crop patterns. A study was conducted in farmer’s fields in two planting patterns in 1997 and 1998 to elucidate population dynamics of green leafhopper, vector of tungro disease and factors affecting their dynamics. A susceptible rice variety to green leafhopper was planted three times in one season with monthly interval between planting time. The rice was planted following farmer usual practices except no insecticide was applied. The population of green leafhopper and their natural enemies was surveyed by sweeping net. The egg predator and parasitoid were observed by dissecting the rice stems and incubating the discovered eggs. Life table of the first generation was constructed. The key-factor analysis was conducted to identify the key-mortality factor by regression methods. Numerical response of natural enemies was also analyzed to know the relationship of key-mortality to predator. Population density of green leafhopper increased mainly during early stage of rice growth in the rice-rice-rice planting pattern, but in the rice-rice-fallow/secondary crop planting patterns showed almost no population increase at all. The nymph mortality including adult disappearance before maturation was the key mortality for the population in both planting patterns. However, there were different in population process between population in different planting patterns. In contrast to the rice-rice-secondary crop, there were no numerical response between nymphal mortality and predator density in the rice-rice-rice planting pattern. In the rice-rice-rice planting pattern adults dispersal played important role. Therefore to control tungro, reducing feeding and inoculation ability of green leafhopper was considered important. In the rice-rice-secondary crop, natural enemies conservation especially the predator was considered important.

Penemuan Jerami sebagai Bahan Baku Budidaya Jamur Tiram Putih (Pleurotus ostreatus) di Fakultas Pertanian UGM Ambarwati Harsojo Tjokrosoedarmo
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Faktor Sosial Ekonomi yang Mempengaruhi Petani dalam Penerapan Pengendalian Hama Terpadu (PHT) Sunarru Samsi Hariadi
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

For spreading concept of Integrated Pest Management (PHT), Agricultural Disease and Plant Controllers (PHP) and Field Agricultural Extension Workers (PPL) worked together for agricultural extension about integrated pest management through Field School of Integrated Pest Management (SLPHT), in the hope that farmers could adopt PHT in their rice field. The result of the research in Central Java and Yogyakarta Special Region Province showed that social economic factors namely farmers income, farmers knowledge about PHT, farmers attitude about PHT, and farmers participation in SLPHT influenced adoption of PHT.

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

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.

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

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.

Pengaruh Cara Aplikasi Minyak Suling Melaleuca bracteata dan Metil Eugenol terhadap Daya Pikat Lalat Buah Bactrocera dorsalis Agus Kardinan; Momo Iskandar; Ellyda Abas Wikardi
Jurnal Perlindungan Tanaman Indonesia Vol 4, No 1 (1998)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9877

Research has been conducted at farmer’s fruit garden in Cilebut area, Bogor during 1997–1998. The objective is to know the effect of some application techniques of oil distilled from Melaleuca bracteata leaves on trapping fruit fly. Research consisted of three activities, those were the effect of some techniques of application on trapping fruit flies (I) weekly, (2) in two weeks and (3) the effects of some concentrations of methyl eugenol (ME) on trapping fruit fly. All treatments were hung at the fruit trees as high as 1.5 m. Observations were done in the number and gender of fruit flies trapped weekly and two-weekly. Result revealed that melaleuca distilled oil can be applied either by dropping into water or into cotton ball. Melaleuca leaves distilled oil should be applied once in two weeks, since its effectiveness lasted for two weeks only. The minimum concentration of methyl eugenol which could fruit flies effectively was 57%.

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Contact Name
Y. Andi Trisyono

Contact Email
anditrisyono@ugm.ac.id

Phone
+62274-523926

Journal Mail Official
jpti.faperta@ugm.ac.id

Editorial Address
Jalan Flora No. 1, Bulaksumur, Sleman, Yogyakarta, 55281

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Y. Andi Trisyono

Contact Email anditrisyono@ugm.ac.id

Phone +62274-523926

Journal Mail Official jpti.faperta@ugm.ac.id

Editorial Address Jalan Flora No. 1, Bulaksumur, Sleman, Yogyakarta, 55281

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Y. Andi Trisyono

Contact Email
anditrisyono@ugm.ac.id

Phone
+62274-523926

Journal Mail Official
jpti.faperta@ugm.ac.id

Editorial Address
Jalan Flora No. 1, Bulaksumur, Sleman, Yogyakarta, 55281

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA