Supriyatdi, Dedi
Politeknik Negeri Lampung

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Aktivitas Ekstrak Biji Tanaman Mindi (Melia azedarach L.) terhadap Spodoptera litura F. (Lepidoptera: Noctuidae) Hamdani, Hamdani; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 5 No. 2, Oktober 2017
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v5i2.321

Abstract

This study was conducted to evaluate the effectiveness and biological activity of Melia azedarach L. (Meliaceae) seed extract against armyworm, Spodoptera litura F.  The first instar larvae were fed extract-treated broccoli leaves for 2 days, then were maintained on untreated leaves until the third instar stage.  Records were kept in regard to the larvae mortality and developmental time of surviving larvae from the first instar to the third instar. The result showed that M. azedarach L. seed extract at concentration of 50 g.l-1 (5%) exhibited moderate insecticidal activity against S. litura larvae (43,30%-68,33% mortality).  Addition of detergent at 0,2% to extract did not increase insecticidal activity of the extract. However, boiling seed extract at concentration of 50 g.l-1 (5%) during 10 until 20 minutes increased insecticidal activity of extract (66,67%-68,33% mortality).  Generally, M. azedarach seed extract treatment did not affect on developmental time of  S. litura larvae.   Keywords: armyworm, biological activity, botanical insecticide, chinaberry tree, extract
Pengaruh Konsentrasi Stimulan dan Intensitas Sadap pada Produksi Lateks Tanaman Karet Seedling (Hevea brasiliensis Muell. Arg.) Muhtaria, Charles; Supriyatdi, Dedi; Rofiq, Muhammad
Jurnal Agro Industri Perkebunan Volume 3 No. 1, Mei 2015
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v3i1.19

Abstract

The lacks of national latex productivity caused by most of rubber trees (85%)managed by folks plantations which have low productivities. Good management and performance of cultivation needs for increase latex productivity, mainly in tapping process. The purpose of this research was to study about effects of ethepon stimulant application on seedling rubber trees,determine the proper tapping intensity, and to find out interaction between stimulant applications with tapping intensitytowards seedling rubber trees.The study have been done during 3 months from September to November 2014 using Randomized Complete Block Design (RCBD) factorial with 2 factor. The first factor wasstimulant concentration (C) with 2 stage, C0 = without stimulant application and C1 = stimulant application as recommended rate. The second factor wastapping intensity (I) with 3 stage. I1= once every two days, I2= once every 3 days, and I3= once every 4 days.Thus obtained 6 treatment combinationwith 4 repeats. The study result shows that the latex and dry rubber production towards seedling rubber trees could be increased by stimulant application, tapping intensity did not give effect on increasing latex volume and dry rubber production, and there is no interaction between stimulant applications with tapping intensity.Keywords: latex production, seedling rubber trees,stimulant, tapping intensityPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/19
Pengaruh Ekstrak Rimpang Alang-alang (Imperata cylindrica L.) pada Bobot Kering dan Persen Penutupan Gulma Tamin, Argi Zhafran; Supriyatdi, Dedi; Syofian, Mirodi
Jurnal Agro Industri Perkebunan Volume 5 No. 2, Oktober 2017
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v5i2.356

Abstract

The use of herbicides has a negative impact on the environment so an environmentally friendly herbicide is needed. Alang-alang that are available in almost every area has a content of tannins in the form of allelopathy potential for weed control. The objective of the research is to know the percent of weed coverage due to the application of alang-alang bioherbicide.Concentration levels were tested in this research are: 5%, 10%, 15%, and 20%. The research was arranged in a randomized block design that has five replication. Variables observed were the dry weight of weeds and percent of weed coverage. The results of this research showed that all various concentrations have not affected in controlling weeds and percent of weed coverage. Keywords: allelopathy, bioherbicide, weed control
Penggunaan Asap Cair dan Arang Aktif Tempurung Kelapa pada Mutu Karet Krep Martrias, Dina; Edison, Rachmad; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 3 No. 1, Mei 2015
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v3i1.14

Abstract

Rubber (Hevea brasiliensis Muell. Arg.) is one of  important agriculture comodity on Indonesia. Wide area of Indonesia rubber agriculture on 2013 are 3,5 million hectares. With 3,2 million tones production maked Indonesia at second level ocupasi because low quality of block rubber. This research objective are getting liquid smoke dosage and active carbon as latexs coagulant. Research used randomized  completely block design (RCBD) with 12 treatments and repeat 3 times. Liquid smoke dosage with 1:1 dilution and 2,60 pH are 6%, 8%, 10% and active carbon dosage 1% and 2% with formiat acid as a control. Latek coagulating process rubber production and rubber crepe quality testing suitable with SIR did in procesing factory and SIR quality testing laboratory Way Berulu PTPN VII, Pesawaran, Lampung. This research carried out November 2014 until  January 2015. The results of this research showed more high liquid smoke dosage and active carbon from coconut shell can effect time of lateks coagulation fasier in 4,8 minutes. More high dosage of liquid smoke and active carbon treatment effected decrease of PRI and increase of latex waste level, dust level and evaporate substance level. Liquid smoke with 1:1 dilition and active carbon from coconut shell as latex coagulant showed dust level higher, so the latex are not suitable with SIR. The higher value because tar composition of liquid smoke from coconut shell.Keywords: active carbon coconut shell, liquid smoke, rubber crepe qualityPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/14
Pengaruh Lama Penyimpanan dan Konsentrasi Aplikasi Ekstrak Biji Mahoni Hasil Fermentasi terhadap Efektivitasnya Hamdani, Hamdani; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 5 No. 1, Mei 2017
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v5i1.652

Abstract

Armyworm (Spodoptera litura F.) as a polyfagous insect is a key pest of either food crops or estate crops. The larva often attack leaves of beans, cereal, shallot, cabbage, cotton, tobacco, and sugarcane. Synthetic insecticides are usually used 2 – 3 times a week in order to manage this insect. The use of synthetic insecticides need high cost, have negative impacts such as insect resistance and resurgence, killing non-target insects, residual effects on yield, and environmental contamination and pollution. Botanical insecticide has a highly potential to be used in IPM because of its characteristics (no residual effect, cheap, easy to get and easy to apply). Mahogany seeds contain alkaloid, saponin, and flavonoid that have good insecticide activity. Extract of mahogany seeds can be used as insecticide, anti-feedant, growth retardant, and fertile retardant. The effectivity of mahogany seed extracts is affected by storage time and its concentration. The results of the experiment are the extract of mahogany seeds can be stored up to 3 weeks, and the highest effective is reached by the concentration of 20%, followed by 10% - 15% concentration as moderately effective.   Keywords: botanical insecticides, extract, mahogany seedPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/652
Pembuatan Gula Aren Cair dengan Pengaturan Kapur dan Suhu Evaporasi Nursafuan, Didik; Ersan, Ersan; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 4 No. 2, Oktober 2016
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v4i2.49

Abstract

National sugar requirement for direct consumption of households and industry will increase in line with population growth. The national sugar demand in 2014 reached 5,700 million tons, while national production only 3,500 million tons. The aim of research to get a way to make palm sugar liquid.  With a temperature of line and evaporation. The research was arranged in a randomized complete block design with a factorial treatment without the provision of lime and lime 0,05% combined with avaporation temperature of 70 0C, 80 0C, evaporation temperature and 90 0C, evaporation temperature. The result showed that the best result of tained in the treatment of lime with evaporation temperature of 70 C ocontent % feces 0,49,043% ash content, reduction sugar 3,75% All treatment SNI of lime meet the quality standards.Keywords: evaporation temperature, lime, liquid palm sugarPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/49
Analisis Faktor-faktor Adopsi Metode PsPSP pada Penanggulangan Hama Penggerek Buah Kakao (PBK) di Pekon Kuripan Khairudin, Khairudin; Saty, Fadila Marga; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 3 No. 1, Mei 2015
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v3i1.17

Abstract

PsPSP method is cultural technique of cacao cultivation for handling Cocoa Podborer (Conopomorpha cramerella Snell.), but less aplicated by farmers in Lampung Province. The research objective are investigated the adoption level and analyze influence factors toward PsPSP method of the cacao farmers adopted in Pekon Kuripan, Kecamatan Limau, Kabupaten Tanggamus. The research used survey method. Responder determined through randomized by taking 40 people of cocoa farmers. The research was carried out on October until November 2014. Scoring system is an instrument to analyze adoption level and Multiple Linier Regresion to analyse the influence factors of PsPSP method. Based on the result of interview used questioner known that the adoption level of cacao farmers are still less than average  value. Self inside factors (age, education level, cultivation experiences) and outside factor of farmer (elucidation intensity) are significant toward adoption level of PsPSP method. Wide area of farm and quantity of responsibility family are not significant toward adoption level of PsPSP method.Keywords : cocoa podborer, method adoption, PsPSPPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/17
Efektivitas Kombinasi Lumpur Aktif dan Natrium Bikarbonat (NaHCO3) dalam Pengelolaan Limbah Cair Industri Tebu (Saccharum officinarum L.) Sanjaya, Refky; Subiantoro, Rijadi; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 5 No. 1, Mei 2017
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v5i1.650

Abstract

In the sugarcane processing into sugar, it will produce g. About 52,9% of liquias, solid, and luquid waste. About 52,9% of liquid waste cause many problems. If the liquid waste directly discharged into the waters, it will cause pollution of water bodies, as well as air pollution around the river. The objective of this study is to obtain the effective and duration activity of the combination of active sludge and sodium bicarbonate in reducing the sugarcane industry of liquid waste. In this research, liquid waste management is done by aerobicized batch system stagnant in laboratory scale with the descriptive analysis. Biodegradation treatment is given to the liquid waste derived from anaerobic ponds in Bunga Mayang Sugar Mill, North Lampung. The treatment is L0 = without treatment (control), L1 = without sludge + 5 g.l-1 sodium bicarbonate, L2 = 100 ml.l-1 active sludge + 5 g.l-1 sodium bicarbonate. The result showed that application of 100 ml.l-1 active sludge + 5 g.l-1 sodium bicarbonate can increase the pH to 7,85, increase DO to 0,16 mg.l-1, reduce COD to 48,18%, increase sulfide content to 90,44%, increase turbidity to 95,4%, increase the wastewater temperature to 35oC, and the time required is shorter than the conventional anaerobic pools.   Keywords: active sludge, liqud waste, sodium bicarbonatePermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/650
Pengendalian Ulatgrayak (Spodoptera litura F.) dengan Ekstrak Ubi Gadung dan Ekstrak Buah Maja Darmanto, I Wayan; Supriyatdi, Dedi; Sudirman, Albertus
Jurnal Agro Industri Perkebunan Volume 7 No. 1, 2019
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v7i1.1052

Abstract

Armyworm (Spodoptera litura F.) is one of the important polyphag leaf pests that attacks almost all crops. The objective of this study was to determine the effect of various concentrations of bioinsecticide made of dioscorea tuber and aegle fruit extract on larval mortality. The research was conducted at the crop laboratory, Lampung State Polytechnic since October 2017 until December 2017. The experimental design is a completely randomized design with six treatments and four and replications. The parameters observed is mortality of armyworm larvae, which would then be analyzed using fingerprint of different varieties. That result showed that dioscorea tuber and aegle fruit extract has affected on larval mortality armyworm. Pure (100%) dioscorin tuber extract exhibited the highest larval mortality.   Keywords: aegle fruit, botanical insecticide, dioscorea tuber
Adaptation of Tea Seeds (Camellia Sinensis L.) Lowland Based on Physiological Characteristics and Growth at Suboptimal Temperatures Gusta, Adryade Reshi; Syofian, Mirodi; Supriyatdi, Dedi
Jurnal Penelitian Pertanian Terapan Vol 18, No 1 (2018)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (390.915 KB) | DOI: 10.25181/jppt.v18i1.1228

Abstract

This study aims to determine the best clone species and the best dosage of Salvinia natans compost on the growth and physiological character of lowland tea. This study aims to determine the best types of clones and dosage of Salvinia natans compost for growth and physiological character of lowland tea. This study used a randomized block design experiment with three replications arranged in factorial 2x4. The first factor is a type of clones consists of two (2) levels, namely: Gambung 6 (G1) and Gambung 7 (G2). The second factor is the dosage of Salvinia natans compost with topsoil 100% (K0), topsoil and Salvinia natans compost comparison by1: 1(K1), topsoil and Salvinia natans compost comparison by2: 1(K2), dan topsoil and Salvinia natans compost comparison by3: 1(K3). All data were analyzed for the variance. Analysis followed by separation of means using LSD test with significance level of 5%. The results showed that the clones of Gambung 7 showed the higher value for observation variability in higher growth of seedlings (40,75) and better dry weight(10,78 g). Topsoil planting medium comparison by Salvinia natans compost (1: 1) showed the higher value for observation variability in higher growth of seedlings (42,25) and better dry weight (10,95 g). So, the conclusion is Gambung 7 for the best clone species on the growth and physiological character of lowland tea. The best dosage of Salvinia natans compost on the growth and physiological character of lowland tea is topsoil planting medium comparison by Salvinia natans compost (1: 1).