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INDONESIA
Jurnal Perlindungan Tanaman Indonesia
Published by Universitas Gadjah Mada
ISSN : 14101637     EISSN : 25484788     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 9, No 1 (2003)" : 7 Documents clear
Identifikasi Nematoda Sista Kuning (Globodera rostochiensis) pada Kentang di Batu, Jawa Timur Mulyadi Mulyadi; Bambang Rahayu T. P.; B. Triman; Siwi Indarti
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12291

Abstract

Identification of Globodera rostochiensis was done based on the information given by the Direktorat Perlindungan Hortikultura, that the potato plants in the sub district of Bumiaji, Batu, East Java, were attacked by potato cyst nematode (Globodera). Plants and soil samples were taken from the potato's areas in the sub-district of Bumiaji, especially in the villages of Brakseng (± 1,700-1,800 m a.s.l), Tunggangan (± 1,600-1,700 m a.s.l), Kembangan (± 1,600-1.700 m a.s.l), and Junggo (± 1,200 m a.s.l). Based on morphological observations on eggs, larvae, females, and cysts, the nematode was identified as Globodera rostochiensis with special morphological characters: 1) second stage larvae vermifonn with total body length 531 - 563μ (x 548,4 μ), body width 22 - 26 μ (x 23,6u), stylet well developed with stylet knobs rounded, and part of the posterior portion hyaline in appearance; 2) cyst globular in shape with protruding neck, cyst's length 470 - 1,008 μ (x 638,08 μ), cyst's width 357 - 744 μ (x 490,33μ), and when the vulval basin is lost forming a single circular fenestra. Cuticle surface between anus and vulva basin have more than 12 paralel ridges.
Ledakan Populasi Jenis Respo, Filicaulis bleekeri, di Sentra Produksi Sayur Rejang Lebong, Bengkulu Dwinardi Apriyanto; B. Toha; I. Manti
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12278

Abstract

During the last two years a slug species, Filicaulis bleekeri (Keferst.), has become important pest of some vegetable crops in vegetable production central Rejang Lebong,Bengkulu. This pest is called "respo" by local farmers, who majority are Javanese. Data from preliminary observation indicated that this pest population was very high and may caused harvest failure on some vegetable crops, particularly Cruciferae such as cabbage, chinese cabbage, and cauliflower. In several sampling activities in 2000 and 2001, the population density of respo reached >10 per mature cabbage plant and >7 per flowered cauliflower plant. Sampling on young cabbage and chinese cabbage resulted >2 respo per 1 m of row, but killed >80% of transplanted cabbage and 75% of transplanted chinese cabbage. Whereas sampling in fallow land resulted >60 respo per m2. There is no much information on this pest presently; therefore it is necessary to study the biology as well technology and as control strategy of the species.
Keefektifan Steinernema spp. terhadap Spodoptera exigua F. X. Wagiman; B. Triman; Rr. Siti Astuti
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12280

Abstract

Effectiveness of entomopathogenic nematodes Steinernema spp. against mortality of larvae and pupae of Spodoptera exigua Hubner (Lepidoptera: Noctuidae) was evaluated in the Laboratory of Nematology and Biological Control at the Faculty of Agriculture, Gadjah Mada University. The most virulent isolate of the nematode was selected amongst isolates from Solo, Jombang, and Medan. The effectiveness was determined by analising mortality of the S. exigua that was treated with Steinernema spp. at concentration rates of 0, 50, 100, 200, 400 infective juvenil (IJ) per 1.5 mL aquadest. Inoculation of the nematode was done by filter paper method. Results showed that all isolates were able to infect the third instar of S. exigua. Solo and Jombang isolates caused relative similar in mortalities ca. 98 and 94%, and significantly higher than Medan isolate ca. 86. Hence, the Solo isolate was preferred for efficacy against the insect larvae and pupae. The mortality of S. exigua due to the Steinernema spp. was influenced by the insect instars. The insect mortality-rates of L1, L2, and pupae were 13,3; 6.6 - 13,3; 23,3 - 60% and lower than those of L3, L4, and L5 ca. 41,6 - 75; 46,6 - 60; and 66,6 - 90%, respectively. The nematode concentration-rates did not influenced the mortality of L1, L2, L3, L4, and pupae but it significantly influenced the L5 mortality. The concentration rate of 200 IJ per 1.5 ml aquadest caused the highest mortality.
Pewarisan Sifat Resistensi terhadap Deltametrin pada Plutella xylostella Wahyu Listyaningrum; Y. Andi Trisyono; Aziz Purwantoro
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12284

Abstract

A field population of Plutella xylostella (Lepidoptera: Plutellidae) in Central Java has been reported to become resistant to a pyretroid synthetic deltamethrin. The objective of this research was to study the genetics of resistance in that population. The resistant population wascontinously sprayed with deltamethrin in the laboratory to increase the resistant level. The resistant population used in this study was 51 more resistant to deltamethrin than was the susceptible population. Bioassays using F1 obtaining from the reciprocal mating between the susceptible and resistant parents showed that the resistance to deltamethrin in P. xylostella was inherited recessively and the maternal effects were observed. The degree of dominance (D) was -0.8 when resistant female was mated with the susceptible male and the D value was -0.3 when the susceptible female was mated with the resistant male. Using the monogenic model it was proved that the resistance was controlled by single gen. The implementation of these findings for the development of resistance management program will be discussed.
Epidemi Penyakit Daun Keriting Kuning Cabai Y. B. Sumardiyono; Sedyo Hartono; Sri Sulandari
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12269

Abstract

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Keefektifan Limbah Tembakau sebagai Insektisida Nabati untuk Mengendalikan Hama Helopeltis sp. pada Kakao Soekadar Wiryadiputra
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12289

Abstract

The effectiveness of tobacco waste extract to control Helopeltis sp. on cocoa had been tested in laboratory and field conditions. Side effects of the extract on growth of cocoa flower and predatory insects of Helopeltis sp. had also been observed after field application. The results revealed that tobacco waste extract at 10.0% concentration in water was effective in suppressing the population of Helopeltis sp. both in laboratory and field trials, and it was not significantly different compared to cypermethrin 0.1% formulation and BPMC 0.2% formulation. Application of tobacco extract and insecticides did not result in negative effects on the growth of cocoa flower, nevertheless the tratmens affected the population of predatory insects of spiders and Reduviidae.
Hubungan Pemencaran Kutu Daun dengan Diseminasi Potato Virus Y (PVY) pada Tanaman Kentang (Solanum tuberosum L.) Reymas M. R. Ruimassa; Sri Hendrastuti Hidayat; Rusmilah Suseno; Soemartono Sosromarsono
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12271

Abstract

Two aphid species, Myzus persicae (Sulzer), and Aphis gossypii (Glover) and the five potato varieties (Alpha, Bintje, Berthaultii, Granola and Premiere) were used in the experiments to study the relationship between insect vector dispersal and dissemination of disease caused by potato virus Y (PVY). The results showed that M. persicae could cause time for the appearance of first symptom two to four time faster than A. gossypii . Although statistical analysis (anova) in general showed that disease incidence is not significantly different for each treatment. M. persicae caused higher disease incidence than A. gossypii on Bintje (56 and 74 days after planting). M. persicae seems to have better capability to disperse when the plant reach vegetative growth stadia which may result in higher efficiency of transmitting the virus. The relationship between aphid dispersal and dissemination of PVY can be grouped into four categories (1) plant with aphid and showing symptom; (2) plant without aphid but showing symptom; (3) plant with aphid but without symptom; (4) plant without aphid and without symptom.

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