Jurnal Entomologi Indonesia
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Parameter Demografi Opius chromatomyiae (Hymenoptera: Braconidae) pada Lalat Pengorok Daun Liriomyza Huidobrensis (diptera: agromyzidae)
No full textOpius chromatomyiae (Hymenoptera: Braconidae) is an endoparasitoid attacking leafminers in the field. The objective of the research is to study the statitiscal demographic of the parasitoid. Result showed that female lifespan (9.95 days) was shorter than male (11.73). Female fecundity was about 104.73 eggs. with rate of egg production per day was about 9.31 eggs. This parasitois was also found to be female-biased sex ratio. Regarding population parameter, net reproduction rate (Ro) was about 28.55, of increase (λ) 1.23. The stable age of Opius chromatomyiae was about 37.93% eggs, 24.92 % larval, 20.36 % pupae and 16.78 % adult.KEY WORDS: Opius chromatomyiae, parasitoid, net reproduction
Pertumbuhan Bakteri Photorhabdus luminescens pada Berbagai Media dan Produksi Eksotoksin sebagai Racun Serangga.
Full text linkThe aim of this experiment was to find out the type of medium that was potential for the metabolite production and growth of P. luminescens. LB, NB, Wakimoto, and T3 were examined as growth media for metabolite production and growth of P. luminescens. LB was the best medium for the growth of P. luminescens and metabolite production. KEY WORDS: Photorhabdus luminescens, media, exotoxin, toxicity
Pengujian Ekstrak Tumbuhan Vitex trifolia L., Acorus colomus L., dan Andropogon nardus L. terhadap Hama Pasca Panen Araecerus fasciculatus De Geer (Coleoptera: Anthribidae) pada Biji Kakao
Full text linkAraecerus fasciculatus (Coleoptera: Anthribidae) is a primary pest mostly found in cocoa bean storage. Controlling A. fascuculatus is highly necessary, as this action would also reduce infestation of secondary pests. Utilization of natural materials as bait or trap is one applicable method to lessen damage and loss during storage. Vitex trifolia L., Acorus colomus L., and Andropogon nardus L are plant species that posess insecticidal properties that can be used to control post harvest pests. Materials used in this experiment are leaves of V. trifolia, rhizome of A. colomus and leaves of A. nardus. The three types of materials are blended and sieved with 300 mesh until finely broken up for make powder formulation. As much as 1 g of powder extract was taken then mixed with additional substract (water + CMC + saw dusts). The mixtures were then shaped in the form of ellipse resembling cocoa beans with approximately similar weight of 0.6 g (± 20 beans). Results show that V. trifolia and A. nardus are highly repellent (90.5 % and 94.5%) to A. fasciculatus, andcrhizome of A. colomus is attractant to A. fasciculatus. KEY WORDS: Araecerus fasciculatus, Vitex trifolia, Acorus colomus, Andropogon nardus, cocoa, repellant, attractant
Keanekaragaman Serangga Hama dan Musuh Alami pada Lahan Pertanaman Kedelai di Kecamatan Balong-Ponorogo
Full text linkThe study aims to determine the presence of pests and natural enemies on soybean plants and to study the effect of insecticides on the diversity. Methods for observation of insects was done by using different type of traps i.e. yellow pan trap, pitfall trap, light trap, sweeping net and direct observation (visual). The presence of pests and natural enemies of soybean plants on plots without insecticide was lower than on the plots that was treated with insecticide. Composition of the population of pests found in soybean plots that were not treated with insecticide were dominated by Aphis sp. followed by Phaedonia inclusa, Riptortus linearis, Nezara viridula and Ophiomyia phaseoli. Composition of the population of natural enemies (predators) found in soybean cropps that were not treated with insecticide was family Coccinellidae followed by Syrphidae, Chrysopidae, Mantidae and Oxyopidae. The highest composition of natural enemies (parasites) found in treated and untreated soybean plots were family Braconidae then followed by family Ichneumonidae. KEY WORDS: Diversity, pests, predators and parasite
Statistika Demografi Riptortus linearis F. (Hemiptera:Alydidae) pada Kacang Panjang (Vigna sinensis L.)
Full text linkRiptortus linearis is one of the major pests on long bean. In order to control R. linearis, basic informations such as biology and life table are needed. The objective of this research is to study the life table of R. linearis on long bean under laboratory condition. This research was conducted from October 2009 to Februari 2010 at Laboratory Bioecology Parasitoid and Predator, Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University. The variables that were observed in this study consist of: 1) length of growing period from nymphs to imago, 2) adult life span, 3) fecundity, A life table was constructed using life table cohort type. The results showed that the egg stage lasted for 6:37 hours, while the second instar nymph stage I, II, III, IV, V, and VI takes place 2.06, 4.75, 4.55, 4.54, 6.2, and 6.67 days, consecutively. The life span of R. linearis is 29.3 days. The net reproductive rate (R0) R. linearis on long bean is 22.07 individual per female per generation, the innate capacity for increase (rm) 0.06 individual female per day, and the mean generation time (T) 49.94 days. KEY WORDS: Biology, long bean, life table, Riptortus linearis
Keefektivan Beauveria bassiana (Bals.) Vuill. Isolat Indigenous Pagaralam Sumatera Selatan Pada Media Beras Terhadap Larva Plutella xylostella Linn. (Lepidoptera: Yponomeutidae)
Full text linkThe objective of study was to investigate the effectiveness of Beauveria bassiana isolate cultured in half-ripe rice media against third-instar larvae of Plutella xylostella. The research used 10 isolates consisted of 4 isolates that were originnally collected from Pagaralam i.e. PD1 (isolated from P. xylostella cadaver), PD2, PD8, PD9B (from Crysodeixis chalcites cadaver), and 6 isolates from other areas as comparison, i.e. CCW3 (from Crysodeixis chalcites cadaver), BBL (from Hypothenemus hampei cadaver), CH (from Conomorpha cramerella cadaver), CPJW (from H. hampei cadavi), WC (from Nilaparvata lugens cadaver), and WSJT (from Leptocorixa acuta cadaver). The parameters that were measured were mortality of larvae, time of death and behaviour of larvae after application. Result of the test showed that B. bassiana isolated from L. acuta (WSJT isolate) caused the highest mortality i.e. 73.34 %, with the highest spore density 5.6x107 spore ml-1 (in half-rice media) and 3.0x107 spore ml-1 (GYA media). The lowest LT50 was 19.27 hours, and was obtained from the application of PD9B. After application of B. bassiana, the behaviour of larvae was slightly change from a healthy one to less in consuming of food and then die.KEY WORDS: Effectivity, Plutella xylostella, Beauveria bassiana, LT5
Implikasi Keberadaan Agens Hayati Neochetina eichhorniae (Coleoptera: Curculionidae) Terhadap Eceng Gondok
No full textThe effectiveness of Neochetina eichhorniae as a biocontrol agent of waterhyacinth was evaluated in West Java and DKI Jakarta. The objective of this research was to study the implication of the existence of N. eichhorniae on waterhyacinth. Research was conducted in several freshwater ecosystem infested by waterhyacinth and N. eichhorniae, including Cibinong and Lido lakes (Bogor District), Muara Angke Sanctuary (North Jakarta), and Citarum Hulu river (Purwakarta District), conducted during April to August 2004. The impact of N. eichhorniae on waterhyacinth was evaluated by leaf damage intensity and growth parameter of the plant. Results showed that there was no correlation between waterhyacinth and the occurrence of the N. eichhorniae. The population of N. eichhorniae adults was significantly low in any locations studied. Thus, the existence of the biocontrol agent can not result in decreasing of waterhyacinth population. KEY WORDS: Neochetina eichhorniae, biocontrol, waterhyacinth
Potensi Insektisida Pasak Bumi (Eurycoma longifolia Jack) Terhadap Hama Kubis Crocidolomia Pavonana (F.)(L epidoptera: Crambidae)
Full text linkInsecticidal Potency of Pasak Bumi (Eurycoma longifolia Jack) againts Cabbage Pest Crocidolomia pavonana (F.) (Lepidoptera: Crambidae). The research was conducted at Laboratory of Insect Physiology and Toxicology of Plant Protection Department of Bogor Agricultural University from May to July 2008. Leaves, twigs, barks, and roots of Eurycoma longifolia (Pasak bumi) were extracted with hexane, ethyl acetate, and methanol solvens. The extraction was used single method and level method. Insecticidal activity of each extract has been examined in laboratory to major cabbage pests Crocidolomia pavonana using leaf residual method. Methanol root extract from single method and level method caused 100 and 75.5% mortality of insect test respectively. Hexane and ethyl acetate extracts of leaves, twigs, and barks have low insecticidal activity. The antifeedant effect worked at insect test and varied depends on concentration level. Antifeedant effect also contributed to mortality of larvae along with toxicity of each extract. KEY WORDS: Extract, mortality, bioactivity, Eurycoma longifolia, Crocidolomia pavonan
Evaluasi Produktivitas Kutu Lak, Laccifer lacca Kerr. (Hemiptera: Kerridae) pada Tiga Jenis Tanaman Inang.
Full text linkLac insects (Laccifer lacca Kerr) live parasitically on “kosambi” plants, and produce resins that are called lac. Lac are used for electronics, printing, textile, clothing, cosmetics, and food industry. The insects also live on various plants. The goal of this research was to evaluate the population quality of Lac insect that live on three host plants. The best parameter for population quality was biomass or lac production. Three host plants were inoculated by broods. The result showed that “kosambi” was the best host plant for the insect due to higher biomass (i.e lac production) than “kabesak putih” and “kabesak hitam” plants. KEY WORDS: Lac insect, host plant, population qualit
Keanekaragaman Spesies Parasitoid Telur Helicoverpa armigera (Hübner) pada Sisem Tanam Monokultur dan Polikultur Kapas
Full text linkPolyculture system is one of techniques in pest management. In Indonesia, cotton is always intercropped with second food crops such as maize, soybean, mungbean or peanut. This research was aimed to evaluate the effect of culture system, i.e. cotton monoculture vs. cotton intercropped with soybean on the increase of species diversity of H. armigera egg parasitoids and the parasitoid contribution to mortality of H. armigera. The research was arranged in a split plot design with two main factors: three cotton varieties with three levels of trichome density (Tamcot SP 37, Kanesia 8 and LRA 5166) and the subplots were two cultivation systems (cotton monoculture and polyculture), with three replicates. Observations were made by collecting H. armigera eggs on population of first generation (45 days after planting) and second generation (75 DAP). The results showed that on cotton polyculture the egg parasitoid complex which consisted of Trichogramma spp. and Trichogrammatoidea spp. was higher than that in cotton monoculture and so was the egg parasitism level. The increase of egg parasitism was 24% in the first generation and 15% in the second generation. Parasitoid species found belonged to the genera Trichogramma and Trichogrammatoidea. In the parasitoid complex, Trichogrammatoidea armigera was dominant on the first generation and Trichogramma chilotraeae on the second. The domination succession could be as a result of the higher host-searching capacity of T. chilotraeae than that of T. armigera.KEY WORDS: species diversity, egg parasitoid, Helicoverpa armigera, Trichogramma armigera, Trichogrammatoidea chilotraeae