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All Journal Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Indonesian Journal of Agricultural Science AGRIVITA, Journal of Agricultural Science Jurnal Rekayasa Material, Manufaktur & Energi
Affandi .
Indonesian Fruits Research Institute
Aerospace Engineering Agriculture, Biological Sciences & Forestry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Mathematics Other

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APPLICATION OF FRUIT BAGGING, SANITATION, AND YELLOW STICKY TRAP TO CONTROL THRIPS ON MANGOSTEEN ., Affandi; Emilda, D.; A.S, M. Jawal
Indonesian Journal of Agricultural Science Vol 9, No 1 (2008): April 2008
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Scars on mangosteen fruits caused by thrips are the mostprominent constraint in Indonesian export of mangosteen.Most of the exported mangosteen are rejected due to scarappearance. This research aimed to study the effects of fruitbagging, sanitation, and sticky trap application on the scarintensity on mangosteen. The research was conducted at afarmers polycultured mangosteen orchard in Lima Puluh Kota,West Sumatra, Indonesia from September 2006 to February2007. The mangosteen trees were cultured with cacao andcoconut. To study the effects of bagging on the number of scars,the fruits were individually bagged at different time pointsstarting from the time of calyx falling down (0) followed at 2,4, 6, 8, 10, 12, and 14 weeks later. Each treatment was replicatedsix times. The experiment of sanitation (SNT) and yellowfluorescent sticky trap (YST) application was designed in acompletely randomized design with six replications, except forthe control which was replicated only three times. Four treatmentsstudied were SNT, YST, combination of SNT+YST, andcontrol. The sanitation was applied by removing all weeds underthe canopy of mangosteen trees followed with soil tillage andfogging. The sticky trap was nailed on woody sticks and placedon 3 m above the ground at four different positions around thetree canopy. Parameters observed were the percentage and intensityof scars and number of thrips caught on the sticky traps.The results showed that application of early bagging, SNT, YST,and SNT+YST were effective to reduce intensity and percentageof scars. However, combination of SNT+YST demonstrated thebest results in reducing the intensity and percentage of scars by32.14% and 42.82%, respectively. Combination of SNT+YSTalso drastically decreased thrips population as indicated by thelow number of thrips catched after five biweekly observations.Since the fifth observation, the thrips population was low (lessthan 5 thrips catched per sticky trap) and far below the economicthreshold. The present study implies the importance of earlyfruit bagging, sanitation, and sticky trap application in protectingmangosteen fruits from scars.
DIVERSITY AND ABUNDANCE OF MITES IN A MANDARIN CITRUS ORCHARD IN WEST SUMATRA ., Affandi; Corpuz-Raros, Leonila A.
Indonesian Journal of Agricultural Science Vol 6, No 2 (2005): October 2005
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Some of the most destructive pests in citrus orchards are spider mites.  Monitoring prior applied pest control is a standard procedure for integrated pest management (IPM). The study aimed to survey and determine the distribution, abundance, and diversity of phytophagous, predatory, and detritivorous mites at different stages of development of arboreal plant parts, weeds and litter in the citrus orchard. A periodical sampling surveymethod was conducted on six growth stages of mandarin citrus, weeds and litter of the Indonesian Fruits Research Institute experimental field in Solok, West Sumatra in December 2003 to June 2004. All mites attached on each growth stage of citrus, weeds and litter were trapped and mounted on slide for identification purposes. Identification of the mites was conducted in the Acarology Laboratory, Department of Entomology, University of the Philippines at Los Banos in July-October 2004. The results showed that a very rich mite fauna of 130 species was found in the arboreal parts of citrus crops, weeds and litter below the canopy of the citrus orchard. Among the trophic groups, detritivorous mites were the most abundant, followed by the predators, phytophages, and thoseunknown feeding habit. Among the habitats, weeds harbored the most mite species followed by litter and arboreal parts of the citrus trees. The flush growth stage had the least diverse mite fauna with index diversity (H’) of 1.27, while the most diverse (H’ = 2.01) was found at fruit development phase II. Result of this research was useful in determining proper time for controlling phytophagous mites. Besides, the result alsoprovides important information on potential predatory mites that can be used as biological control agents. Furthermore, the study implies the importance of maintaining cover crops of weeds and litter beneath the citrus trees as refuge and source of alternate prey for predators which suppressed populations of phytophagous mites.
Effect of Mulching, Sanitation and Yellow Fluorescent Sticky Trap Application on Population Fluctuation and Critical Attack Period of Thrip on Mangosteen ., Affandi; Emilda, Deni
AGRIVITA, Journal of Agricultural Science Vol 32, No 3 (2010)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v32i3.25

Abstract

This research aims to know the effect of mulching, sanitation and yellow fluorescent sticky trap application on population fluctuation and critical attack period of thrip on mangosteen which was carried out in a farmer mangosteen orchard in Lima Puluh Kota district, West Sumatra, Indonesia from October 2007 to February 2008. Twenty of plants were used as sampling units. Four plants were used to elucidate the critical period of mangosteen thrip attack that was assessed based on parameter of scar intensity, and sixteen plants were used to study the effects of mulching, sanitation and yellow fluorescent sticky trap on population fluctuation of mangosteen thrips. Each treatment was replicated four times. A completely randomized design was applied and continued with Lowest Significant Different to identity the differences among the treatments. The result showed that critical period of mangosteen thrip was at the 3rd - 10th weeks after fell of calyx. Sanitation combined with application of yellow fluorescent sticky trap reduced percentage and intensity of scars valueby 32.83 % and 5.99 %, respectively. The present study implies that knowledge of mangosteen thrip critical attack period and suitable controlling technique are important for the success of thrip control.Keywords : mangosteen, thrips, critical period, control
SURVEI TINGKAT KEBUGARAN JASMANI DENGAN MENGGUNAKAN TES KEBUGARAN JASMANI INDONESIA PADA SISWA SEKOLAH DASAR ., Affandi; Simanjuntak, Victor; ., Kaswari
Jurnal Pendidikan dan Pembelajaran Khatulistiwa Vol 3, No 9 (2014): September 2014
Publisher : Jurnal Pendidikan dan Pembelajaran Khatulistiwa

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Abstract

Abstrak: Tujuan penelitian adalah untuk mengetahui tingkat kebugaran jasmanisiswa kelas VI Sekolah Dasar Negeri 36 Sungai Raya Kabupaten Kubu Raya.Metode yang digunakan dalam penelitian ini adalah metode deskriptif sertamenggunakan instrumen Tes Kebugaran Jasmani Indonesia (TKJI) kelompok anakumur 10-12 tahun. Populasi dalam penelitian ini adalah seluruh siswa SekolahDasar Negeri 36 Sungai Raya Kabupaten Kubu Raya. Sampel penelitian ini adalah20 siswa (15 putera dan 5 puteri).Hasil penelitian tersebut dengan menggunakanperhitungan deskriptif persentase bahwa tingkat kebugaran jasmani siswa VISekolah Dasar Negeri 36 Sungai Raya Kabupaten Kubu Raya tahun 2014 untukputera sebagian sebesar memiliki kriteria sedang yaitu 47%, sedangkan untukputeri memiliki kriteria kurang yaitu 40%. Disimpulkan hasilnya adalah tingkatkebugaran jasmani pada siswa kategori baik.Kata Kunci : Kebugaran jasmani, Tes Kebugaran Jasmani IndonesiaAbstract: The purpose of the study was to assess the physical fitness of students ofclass VI Public Elementary School 36 Sungai Raya, Kubu Raya district. Themethod used in this research is descriptive method and the use of instrumentsIndonesian Physical Fitness Test (TKJI) group of 10-12 year olds. The populationin this study were all students of State Elementary School 36 Sungai Raya, KubuRaya district. The sample was 20 students (15 sons and 5 daughters) The resultsof the study using descriptive calculation of the percentage of students thatphysical fitness level VI Public Elementary School 36 Sungai Raya, Kubu Rayadistrict 2014 to the son of the majority of the criteria was 47%, while to have adaughter that is 40% less criteria. Summed result is the level of physical fitness instudents either category.Keywords: Physical Fitness, Physical Fitness Tests Indonesia
Studi Efektivitas Jumlah Data Pengukuran Nilai Potensial Terhadap Kinerja BEIA dalam Mendeteksi Lokasi Korosi Beton Bertulang ., Israr; ., affandi; Huzni, Syifaul; Fonna, Syarizal; Tanjung, Iqbal
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.20698

Abstract

Corrosion is a very serious problem. It could not be prevented due to natural events which trigger corrosion itself. Many failures and losses caused by suboptimal early prevention of corrotion, such as the sudden collapse of buildings and infrastructure which incurring loss and casualties. One methode that is widely used to detect corrosion is the Half Cell Potential Mapping methode. However, there is shortage interpretation of data in the methods who need to be considered. Then, the software who could detect early failures caused by corrosion is developing. On of them is Boundary Element Invers Analysis (BEIA). BEIA has succeeded in detecting the location of corrosion in reinforced concrete with 5% error percentage. However, it is necessary to increas its ability. This research aims to find the effect of the amount of potensial value measurement data on BEIA ability to detect corrosion in reinforced concrete. BEIA developed by combining the application of Boundary Element Method (BEM) and Particle Swarm Optimization (PSO). BEM used to calculate potential values on concrete surface, while PSO evaluates the cost function for detecting corrosion in reinforcing steel in concrete. This research wa conducted on reinforced concrete 3-dimensional geometry, namely length, widht and height. In the middle of the concrete there is reinforcement which has corrosion. The parameter of the amount of potential value measurement data was varied in order to get better input in improving the performance of BEIA. That were 5,10, 15 and 20. The simulation showed that the used of the potential value measurement data of 20 had less error percentage value obtained at 650 cm x 50 cm geometry was 0.2 %. These proves that the larger potential value measurement data could improved BEIA performance.
Pengaruh Annealing Baja St 37 Terhadap Kekerasan Dan Kekuatan Tarik ., Affandi; Nasution, Arya Rudi; Tanjung, Iqbal; Siregar, Ahmad Marabdi
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11796

Abstract

Steel ST 37 which is equivalent to AISI (The American Iron Steel Institute) is one of the steels produced for the manufacture of various machine components. To improve the mechanical properties and material structure of ST 37 Steel, it is necessary to carry out the heat treatment (annealing) process. The objective of this study was to determine the annealing treatment of ST 37 steel on hardness and tensile strength to analyze the tensile test on ST 37 steel before and after annealing treatment and to analyze the hardness test of ST 37 steel before and after annealing treatment. The annealing process is carried out by preparing the test material and inserting the test material into the furnace and tightly closing the door of the heat treatment furnace. Set the temperature to be used in the test, which is 500C, and held for 60 minutes. Then turn off the furnace and leave the test specimens in the furnace for 72 hours to cool through the air cooling medium, after which tensile and hardness tests are carried out. The test results of the tensile test specimens with the ASTM E8/E8M standard and the hardness test specimens with the ASTM E18 standard are, the average value of the tensile test results before the annealing process is 50.65 kgf/mm and the average value of the tensile test results after the annealing process is 31.45 kgf/mm. While the average value of the hardness test before the annealing process was 75.22 HRA and the average value of the hardness test after the annealing process was 67.63 HRA. From these results, ST 37 steel before the annealing process has higher hardness and tensile strength. However, in subsequent tests, harder specimens can be used compared to ST 37 Steel specimens, and in the use of heat treatment furnaces, it is preferable to be in a state of heat safety.
Mamfaatkan Limbah Plastik Jenis Styrofoam Untuk Pembuatan Paving Block Harahap, Reza Elvandra; Siregar, Ahmad Marabdi; Zulkarnain, Fahrizal; ., Affandi
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.12390

Abstract

This paving block made from Styrofoam plastic waste is a reuse plastic which has been a big problemin human life from long ago to the present this. These paving blocks are made with a mixture of Styrofoam and sand thas is made in two aggregates, namely varian one with a composition of 50% Styrofoam with a weigth of 600gr anda 50% sand with a weigth600gr and variation two with a composition of 25% Styrofoam with a weigth of 300gr and755 sand with a weigth 900gr. This research is divided in several stages, namely the collection of materials ( Styrofoam and sand), weigth with each aggragate, then cook Styrofoam and mixit with sand, stirring the specimenso that they are well mixed sand and Styrofoam, fed into the mold, extrackted in the mold when its dry. In making this specimen a specimen moled has size 200mm in length, 100mm in widthand 60mm in heigt. 3mm thick irom plate. Then the specimen is cut according to the paving test standards block SNI 03-0691-1996. The specimen is cut using a grinder until it becomes size 60mm x 60mm, then eacg variation was made into 3 specimens where to take the average at the timeof data collection. Specimen variation one produces an average compressive strength of 32MPa, while specimen variation two resulting in an average compressive strength of 25,7MPa.
Karakteristik Gugus Fungsi dan Kekuatan Impak Material Komposit Berpenguat Serat Serbuk Daun Nanas Tanjung, Iqbal; Lubis, Riadini Wanty; Nofri, Irfan; ., Affandi; Siregar, Chandra A; Siregar, Ahmad Marabdi; Efrida, Rizki
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.25533

Abstract

The objective of this study is to investigate the impact strength and functional group characteristics, as identified through FTIR spectroscopy, of composite materials reinforced with pineapple leaf powder fibers that have undergone physical property enhancement via alkali treatment (NaOH). A series of processes were conducted to produce the pineapple leaf powder, starting with drying fresh pineapple leaves until they turned brown. The dried leaves were then cleaned and soaked in a 5% NaOH solution for durations of 1, 3, 5, 7, and 9 hours to modify their physical properties. After treatment, the leaves were rinsed thoroughly and oven-dried at 60°C for 5 hours. The dried leaves were subsequently ground and sieved using a 150-mesh screen. This study involved two main observations: functional group analysis using FTIR spectroscopy and mechanical performance evaluation through impact testing. A total of 30 composite specimens were prepared and fabricated using a stepwise lamination method, following the ASTM D256 impact testing standard. The results indicate that alkali treatment progressively degraded the hemicellulose and lignin content in the pineapple leaf fibers, significantly enhancing the impact energy absorption of the composite material. However, extended treatment durations adversely affected the fiber quality, leading to structural damage and reduced interfacial cohesion between the composite components.
Co-Authors ., Israr Ahmad Marabdi Siregar Arya Rudi Nasution D. Emilda Deni Emilda Efrida, Rizki Fahrizal Zulkarnain Fonna, Syarizal Harahap, Reza Elvandra Irfan Nofri Kaswari . Leonila A. Corpuz-Raros Lubis, Riadini Wanty M. Jawal A.S Siregar, Chandra A Syifaul Huzni Tanjung, Iqbal Victor Simanjuntak