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INDONESIA
AGRITROP
Published by Universitas Udayana
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Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
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Articles 40 Documents
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Biologi Predator Cheilomenes sexmaculata (Fabr.) (Coleoptera: Coccinellidae) pada Kutu Daun Macrosiphoniela sanborni Gilette (Homoptera: Aphididae) CYCCU TOBING, MARYANI; BAKTI NASUTION, DARMA
AGRITROP Vol. 26, No. 3 September 2007
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Abstract

A research was conducted at the screening house and laboratory of Department of Plant Pests and Diseases,University of North Sumatra, Medan, under room temperature of 20-30oC and relative humidity 78-94%. Theobjectives of this research were to study the morphological and biological characteristic. The results showed thategg, first, second, third and fourth larva instars, and pupae stages of C. sexmaculata were 2,70 ± 0.82; 1,60 ± 0.51;2,30 ± 0.48; 3,10 ± 0.56; 4,50 ± 0,52 and 4,30 ± 0.48 days respectively. Fecundity was 136,20 ± 10.37 eggs, fertility81,82 ± 8,17% and life cycle 52,40 ± 0.69 days. The female lived for 31,20 ± 2,69 days longer than male whichwere 30,00 ± 3,26 days. Rate reproduction (Ro) = 5 and intrinsic rate of increase (rm) = 0,067.
BUNGA DAN BUAH GUGUR PADA TANAMAN MANGGIS (GARCINA MANGOSTANA L.) ASAL BIJI DAN SAMBUNGAN RAI, I NYOMAN
AGRITROP Vol. 26, No. 2 Juni 2007
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Abstract

Grafted mangosteen tree have a shorter juvenile period than that of the seedling trees because it starts to flower earlier. However, productivity of the grafted trees is low because number of flowers and fruits drop is high. The research was conducted to study the difference of flowers and fruit drop between seedling and grafted trees related to N, P, and K plant nutrition levels and position of growing flower and fruit. The result showed that percentage of flowers and fruits drop of grafted mangosteen (14,65% and 85,38%) were higher than those of seedling plants (6,93% and 16,58%). Yield of grafted tree (2,17 kg/plant) was significanly lower than that of seedling (7,07 kg/plant) exhibited by low number of harvesting fruit. N, P, and K nutrition leaf levels had no effect on flower and fruit number drop, not only on grafted trees, but also on seedling trees. Flowers and fruits which grow at the basal of tree and/or branch drop were hihger than those of midle and upper part of trees and branchs.
PENGARUH BEBERAPA JENIS PAKAN TERHADAP PERKEMBANGAN ULAT HONGKONG (TENEBRIO MOLITOR.L.) (COLEOPTERA :TENEBRIONIDAE) (THE EFFECT OF SEVERAL TYPES OF FEED ON THE DEVELOPMENT OF HONGKONG CATERPILLARS (TENEBRIO MOLITOR) (COLEOPTERA: TENEBRIONIDAE)) DARMIATI, NI NENGAH
AGRITROP Vol. 29, No. 2 Juni 2010
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Abstract

Purpose of this research is to determine the influence of several types of feed on the development of hongkong caterpillars (Tenebrio molitor) (Coleoptera: Tenebrionidae). Research conducted since September 2007 until July 2008 in the laboratory Plant Pests and Diseases Faculty of Agriculture, Udayana University. There are 11 types of feed tested, and each repeated 5 times, so there are 55 experimental units. The results show that the concentrate 521 gave the highest survival rate compared to other feed treatments, while the soybean feed gave lowest survival rates. Mixture concentrate 521 + banana peel is best feeding hongkong caterpillars, followed by the feed concentrate of 521, while cassava and soybean is less good feed.
Pengaruh Interval Pemberian Air melalui Irigasi Tetes (Drip Irrigation) dan Pupuk Mineral Plus terhadap Produksi Anggur pada Lahan Kering di Kecamatan Gerokgak Kabupaten Buleleng MERIT, I NYOMAN; NARKA, I WAYAN
AGRITROP Vol. 26, No. 1 Maret 2007
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Abstract

A field experiment of drip irrigation was set up in the field on dry land farming at Patas Gerokgak, Buleleng.The aim of the experiment was to demonstrate to the local farmer about the beneficial goal of drip technology inorder to gain a high efficiency of water application. Three intervals of water application, i.e. : 2 days, 4 daysand 6 days (I1, I2, I3) in drip technique, and application of Mineral Plus fertilizers (M1) and without Mineral Plusfertilizers (M0) was observed in a nested block design. Bali grape varieties were used as an indicator. Parameterswhich were observed in second year experiment included the water distribution as indicated by soil water contentat 0 – 15 cm depth, and soil water matrix potential (0 – 30 cm depth) which indicated by Loctonic tensiometer.Plant growth was observed by measuring fresh and dry weight biomass and diameter of grape stalk, regularly. Theresult of the experiment showed that, soil water content of 0 – 15 cm depth was not significantly affected by thetreatment. Plant growth as indicated by fresh weight of biomass, dry weight of biomass and diameter of grape stalkwere not significantly affected by the treatment There were no significant differences between treatments on freshand dry weight biomass, dry biomass and diameter of grape stalk so that the yield of grape as indicated by numberbunch of grape per plant, fresh weight of grape per bunch, fresh weight of grape per plant, dry weight of grapeper bunch, number of grape per bunch were not significantly affected by the treatment. Yield quality as indicatedby volume of grape per pellet, sugar content of grape and colour of grape were no significant differences betweentreatments.
Induksi Pertumbuhan Eksplan Endosperm Ulin dengan IAA dan Kinetine -, HIDAYAT
AGRITROP Vol. 26, No. 4 Desember 2007
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Abstract

The aims of this research for examining the effect of concentrations of Indole Acetic Acid (IAA) and Kinetine onthe growth of ulin. The research using Murashige and Skoog medium was conducted in Biotechnology Laboratoryof Agriculture Faculty, Tanjungpura University from June 2003 to May 2004. All treatments were arranged inrandomized complete design with ten treatments and four replications. The variable of this research was scoring oncallusformation, time of callusformation (days) and number of callus. The result showed that (5.0 ppm IAA + 6.0ppm Kinetine) and (6.0 ppm IAA + 5.0 ppm Kinetine) were better concentration combination for callus induction.The better for time of callusformation and numbers of callus were 5.0 ppm IAA + 6.0 ppm Kinetine.
Pertumbuhan Jamur Merang (Volvariella volvaceae) pada Berbagai Media Tumbuh MAYUN, IDA AYU
AGRITROP Vol. 26, No. 3 September 2007
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Abstract

The objective of this exsperiment was to study the effect of growth media on growth and yield of pady strawmushroom(Volvariella volvaceae). The semi laboratorium experiment was arranged in Randomized CompleteDesign or Fully Randomized Design (CRD) with six level treatment of growth media ie: a) paddy staw; b) fruithusk of the cofee; c) seagegrass; d) banana leaf; and e) woodsawdust. The data analysis in this experiment was:variance and LSD analysis, correlation analyisis, and analysis of regression.The results of this exsperiment was the treatment of media of woodsawdust cannot be used as a media growt ofrank-mushroom because its failure to forming of fruitious body. Generaly can be said that the treatment of growthmedia of banana leaf as the best growth media of paddy straw-mushroom. Hereinafter, that a highest yield of freshfruit body of pady straw-mushroom got from a treatment growth media of banana leaf that is as much 0.8785 kgm-2
KERAGAMAN BEBERAPA SIFAT KIMIA DAN BIOLOGI TANAH PADA BERBAGAI TIPE PENGGUNAAN LAHAN RAWA LEBAK GOFAR, NUNI
AGRITROP Vol. 26, No. 2 Juni 2007
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The purposes of this study were to study: 1) the influence of agricultural land use on some swamp soil chemical (soil pH, Organic C content, N-total, and P-total) and biological (population of bacteria, fungi, and actinomycetes) properties, and 2) correlation between soil microbial population and Organic C content, N-total as well as P-total. Based on the results of field observation, it was determined 6 plant commodities with different length of land use as treatments and secondary forest as control. The results of this study showed that: 1) Differences in land use resulted in different soil chemical (soil pH, Organic C content, N-total, and P-total) and biological (population of bacteria, fungi, and actinomycetes) properties, 2) Soil organic C, N-total and P-total content together significantly affected on population of bacteria and fungi, but did not affected on actinomycetes population. The magnitudes of Soil organic C, N-total and P-total influence on bacteria, fungi, and actinomycetes population were 69,8 %, 59,8 % and 49,7 %, respectively, 3) as soil organic C and P-total contents were constant, soil N-total content significantly affected on population of bacteria and fungi, but did not affected on actinomycetes population, 4) Population of bacteria, fungi and actinomycetes was highly correlated with soil organic C and N-total content, but was not correlated with soil P-total content, 5) the most microbial variation was found on soil collected from rubber plantation, followed by orange and secondary forest.
LAJU INFEKSI PHYTOPHTHORA PALMIVORA PADA TANAMAN KAKAO DI DESA PULUKAN, JEMBRANA SUDARMA, I MADE
AGRITROP Vol. 24, No. 2 Juni 2005
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Abstract

The aim of the research are to know infection rate of P. palmivora, relationship between height of fruits, age of fruits and disease intensity. Field experiment was carried out at Pulukan, Jembrana, started from November 2001 to January 2002. The observation were done to disease intensity and infection rate of P. palmivora that accured naturally by a weekly observation on 20 plants samples from 120 plants (40 are) of reasearch. The disease intensity in relation with height of fruits and age of fruits were analysed by using correlational method. The result of this experiment showed that epidemic of disease was developed as sigmoid curve. Infection rate maximum, 0,077 per unit per day on young fruits age one month. The height and age of fruits factors influenced development of disease. Relationship between height fruits from soil and disease intensity as, Y = 21,089 – 4,671 X1 (r = - 0,679**, r2 = 46 %, X1 = height fruit from soil) and relationship between age of fruit and disease intensity is Y = 20,257 – 4,339 X2 (r = -0,658**, r2 = 43 %, X2 = age of fruit).
PENGARUH MINYAK DAUN CENGKEH (SYZYGIUM AROMATICUM L) TERHADAP SITOPHILUS ORYZAE L (COLEOPTERA: CURCULIONIDAE) (THE EFFECT OF CLOVE LEAF OIL (SYZYGIUM AROMATICUM L.) TO SITOPHILUS ORYZAE) PENGARUH MINYAK DAUN CENGKEH (SYZYGIUM AROMATICUM L) TERHADAP SITOPHILUS ORYZAE L (COLEOP, A.A.A.
AGRITROP Vol. 29, No. 1 Maret 2010
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Abstract

The use of synthetic pesticides are generally less secure because it can be detrimental to human health and the environment, therefore, sought a safe control for the products, people and the environment. Alternatives that need to be developed is the product of the biological nature of the organism narrow spectrum target. This research aims to determine the effect of clove leaf oil to S. oryzae. Research using complete random design (CRD) with various concentrations of clove leaf oil formulation of 0.50%; 0.38%; 0.25%; 0.13 and control, with 5 times replications. The influence of clove leaf oil can be determined by the contact test, repelensi resources, the development of insect populations. The results showed that the leaf oil of clove with a concentration of 0.50%; 0.38%; 0.25% and; 0.13 have influence as a contact poison, not as a repelen but tends to antraktan S. oryzae, as well as inhibiting the development of the insect S. oryzae
Peranan Sucrose Phosphate Synthase (SPS) dan Acid Invertase (AI) Internoda Tebu (Saccharum officinarum L.) dalam Akumulasi Sukrosa -, MISWAR; SUGIHARTO, BAMBANG; HANDOYO, TRI; AYU MADE, SRI
AGRITROP Vol. 26, No. 4 Desember 2007
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Abstract

Sucrose content is an important component of yield in sugarcane (Saccharum officinarum L.) juice and itssynthesis is determines by the activity of Sucrose phosphate synthase (SPS; EC. 2.4.1.14). This enzyme catalyzes thepenultimate reaction of the formation of sucrose from fructose-6-phosphate (F6P) and uridine-5-diphospho glucose(UDPG). Sucrose is synthesized on leaf and translocated into stalk at where it is accumulated to be accumulatedit. In contrast to SPS, acid invertase (AI) is an enzyme that hydrolyze sucrose to glucose and fructose. The abilityof sugarcane to accumulate the sucrose in stalk is determined by the differences between SPS and AI activities.This study was aimed know role of the internodes SPS and AI in sucrose accumulation in the internodes of somesugarcane varieties. SPS, AI and sucrose were extracted from internodes 1, 3 and 5 of 9 month old sugarcane. Theresults showed that sucrose content for all varieties increased concomitant with the rise in the age of internodes.The decrease in AI activity in internode caused the increase in sucrose content in internodes. Meanwhile, highersucrose content in the older internodes was not followed by higher in SPS activity. Generally, there was strongnegative correlation between sucrose content of internodes with SPS and AI activity. In conclusion, the ability ofsugarcane to accumulate sucrose at internodes was primary determined by AI activity, while SPS activity had asmall role on sucrose accumulation at internodes.

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