https://talenta.usu.ac.id/jpt/issue/feedJurnal Pertanian Tropik2023-10-13T18:04:05+07:00Benny Hidayatbendayat@gmail.comOpen Journal Systems<p align="justify"><span class="" lang="en"><span class="">Tropical Agriculture Journal (JPT) is a peer-reviewed online journal of Agriculture Postgraduate Study Program Universitas Sumatera Utara (USU). Journal is a result of research, or scientific reviews of researchers, students and agricultural institutions, and others related to agricultural studies in the tropical region. Published in Indonesian and English language with 3 volumes/year (April, August, December) in 20 Articles</span></span></p> <p align="justify"><span class="" lang="en"><span class=""><span id="result_box" class="" lang="en">Since Vol. 6, No. 3 of 2019, Jurnal Pertanian Tropik Journal moved to the https://talenta.usu.ac.id/jpt/ page facilitated by Talenta Publisher, University of Sumatra Utara, Medan, in order to improve the governance of scientific publications in the Open Journal System (OJS ) </span></span></span><span class="" lang="en"><span class="">ISSN (Print/ Online): 2356-4725/ <a title="eISSN" href="http://u.lipi.go.id/1361782546">2655-7576</a></span></span></p> <p align="justify"><span class="" lang="en"><span class="">The journal of tropical agriculture has been accredited by the Ministry of Technology Research and Higher Education No. 21 / E / KPT / 2018</span></span></p> <p align="justify"> </p>https://talenta.usu.ac.id/jpt/article/view/11663Exploration of Local Durian (Durio zibethinus Murr.) from Semen Sub- District, Kediri, East Java Based on Morphological Character and Geograpical Factor2023-04-01T07:35:01+07:00Rasyadan Taufiq Probojatirasyadant@gmail.comNugraheni Hadiyantinugraheni@unik-kediri.ac.idNina Lisantylisantynina@unik-kediri.ac.idAgustia Dwi Pamujiatitinaagustia@unik-kediri.ac.idMuhammad Riza Firdausirasyadan@gmail.com<p>The purpose of this study is to identify morphological characters and determine the local durian distribution map in Semen District, Kediri Regency. This study uses a purposive sampling method to collect data. Local durian coordinates analyzed using QGIS version 3.6 software. Morphological character is examined by observing morphology. Micro climate factors measured are height, intensity, temperature and humidity of the soil and air, soil pH. The results show that local durin morphology in Semen District Kediri Regency has diversity. There are 10 local durian plants found based on their geographical character. The dendogram results show that local durian has similarities based on its morphological character. This morphological variation dependent to light intensity, altitudinal, the velocity of wind and soil nutrient factors.</p>2023-05-26T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/11605Local Upland Rice Varieties, Solutions to Food Security in Dry Land2023-03-30T14:25:43+07:00muhammad syahril syahrilmuhammadsyahrillubis@unsam.ac.idDolly Sojuangan Siregardollysojuangan@usu.ac.id<p>Indonesia is an agricultural country with the fourth largest population in the world. However, climate change is having a major impact on agricultural production due to increased dry land. For effective agricultural disaster management, it is important to understand and measure drought in rice crop production. The research was conducted by designing a drought agro-ecosystem using PEG 6000. Eleven local upland rice varieties were tested with two sensitive varieties and one tolerant upland rice variety as a comparison. The study was designed using a randomized block design with five replications and tested with an analysis of variance using the contrast method. The results showed that local varieties were more tolerant to drought abiotic stress when compared to inbreed and hybrid varieties. Local varieties showed non significant differences with the varieties recommended for dry land.</p>2023-06-03T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/10959Morphological Characterization of Saprophyte Fungi on Cocoa Fruit Peel Litter2023-02-19T23:54:50+07:00Ahmad Ilham Tanzilaitanzil@unej.ac.idSoleudin Efendisoleudin@gmail.comNilasari Dewinilasaridewi@unej.ac.idAgung Sih Kurniantoagung.sih.kurnianto@unej.ac.id<p>Cocoa is an important commodity crop in Indonesia. However, current obstacles related to the problem of cocoa shell litter which is slow to decompose are an obstacle in plantation management. Therefore it is necessary to conduct research related to the exploration and identification of saprophytic fungi in cocoa pod litter. Samples of cocoa pod litter were taken at PTPN XII, while the isolation and identification processes were carried out at the Mycology Laboratory, Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Brawijaya. From the results of macroscopic and microscopic identification, nine isolates of saprophytic fungi were obtained consisting of seven genera, namely <em>Candida</em> sp., <em>Penicillium</em> sp., <em>Fusidium</em> sp., <em>Rhizopus</em> sp., <em>Chepalosporium</em> sp., <em>Trichoderma</em> sp.1, <em>Trichoderma</em> sp.2, <em>Aspergillus</em> sp., and <em>Trichoderma</em> sp. 3.</p>2023-06-13T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/13564Application of Turmeric Extract Botanical Insecticide On Feeding Activity And Mortality Of Spodoptera Litura Larvae 2023-09-07T08:47:13+07:00Nurmaisahnurmaisah@borneo.ac.idMellia Wasti Maunurmaisah@borneo.ac.idAbdul Rahimnurmaisah@borneo.ac.id<p>This research aimed to evaluate the effectiveness of turmeric extract as a botanical insecticide on the feeding activity and mortality of <em>S</em><em>podoptera</em><em> litura</em> larvae. The method used in this study was a toxicity test using the leaf dip method. The experiment employed a completely randomized design with combinations of turmeric extract concentrations (0, 4, 8, 12, and 16 grams per liter of water) and instar types (1 and 2). The results showed that the application of turmeric extract on cabbage leaves reduced the feeding activity of instar 2 and 3 larvae. Meanwhile, the turmeric extract had an effect on the mortality of instar 2 and 3 larvae only at a concentration of 16%. The symptoms observed in the dead larvae were changes in color and body texture. The conclusion of this research is that 16% is the minimum effective concentration of turmeric extract on instar 2 and 3 <em>S. litura</em> larvae. This study should be continued on other instar types at the field scale.</p> <p> </p>2023-09-07T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/10321 Study of N, P, K Nutrient Uptake In Rice Plants With Total Soil Microbes In Sei Nahodaris Village, Panai Tengah District, Labuhanbatu Regency2022-12-10T22:38:38+07:00Abdul Raufa.raufismail@gmail.comFitra Syawalfitra.sayawal@usu.ac.idM. yusuf Siagianabdurrauf@usu.ac.id<p>The physical, chemical and biological quality of the soil has deteriorated due to the excessive use of chemical fertilizers in paddy fields and neglect to return organic matter to the soil. Populations of soil biota involved in nitrogen fixation and phosphate solubility decrease below this. The purpose of this study was to determine the relationship between rice plants in Satiman, Sei Nahodaris Village, Panai Tengah District, Labuhan Batu Regency, and nutrient uptake of N, P, and K. This research was conducted from October to December 2022. In paddy fields, five zigzag sampling points were used to collect rice plant leaves and rhizosphere soil for sampling. Nutrient uptake of N, P, and K, in addition to total microbial, were the parameters analyzed in this study. The direct Pearson correlation method was used to perform the analysis. Analysis showed that sampling point number 5 had the highest microbial population, namely 9.53 x 106.N, P, and K absorbed at an average of 3.51 percent (optimum), 0.27 percent (excess), and 1.306 percent (optimum). The relationship between total soil microbes and N, P, and K uptake is weak and negative (-0.212) with a closeness of 4.50 percent; very high (0.94) and positive with a closeness level of 88 percent; it is moderate and negative; and weak and negative.-0.46), with a similarity level of 21 percent. So it can be said that phosphate solubilizing bacteria dominate soil microbes in rice plants in Sei Nahodaris Village, Panai Tengah District, Labuhan Batu</p>2023-09-12T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/10343Effectiveness of Ozone Spray to Control Capnodium citri Fungus on Guava Plants (Psidium guajava)2022-12-22T17:28:56+07:00Sutriono Sutrionoosutri14@gmail.comIntan Zaharosutri44@gmail.com<p>Persebaran penyakit embun jelaga pada area tanaman terbilang mudah dan cepat, sehingga diperlukan suatu teknik pengendalian untuk mengendalikan penyakit embun jelaga. Larutan fungisida bisa digunakan sebagai bahan pengendalian karena secara signifikan mampu menurunkan intensitas serangan penyakit embun jelaga, namun penggunaan fungisida menyebabkan tercemarnya lingkungan akibat residu dari fungisida yang telah diaplikasikan<sup>3</sup>. Gangguan penyakit embun jelaga yang disebabkan oleh jamur <em>Capnodium citri</em> Berk. & Desm., ditandai dengan lapisan jamur hanya menutupi permukaan daun dan tidak bersifat sebagai parasit, tetapi tetap merugikan karena menghambat metabolisme terutama proses fotosintesa<sup>6</sup>. Cara yang dilakukan dalam mengendalikan intensitas penyakit embun jelaga adalah menggunakan Ozon. Ozon yang digunakan berasal dari generator ozon dengan metode lucutan plasma atau <em>corona discharge</em>. Ozon (O<sub>3</sub>) merupakan oksidan yang kuat dan berpotensi sebagai bahan desinfektan yang mampu membunuh mikroorganisme patogen seperti bakteri, virus dan jamur. Dalam mengamati efektivitas spray ozone dalam mengendalikan jamur <em>Capnodium citri </em>dilakukan dengan 4 tahap. Pertama, membangkitkan ozone menggunakan reaktor yang diberikan tegangan tinggi dengan panjang reaktor 10cm dan laju udara 5 L/menit. Reaktor diberi tegangan tinggi. Kedua, menghitung konsentrasi ozon menggunakan metode titrasi. Ketiga, perlakuan Jamur <em>Capnodium citri</em> dengan konsentrasi ozon 150 ppm dimasukkan kedalam air sebanyak 1000 ml selama kontrol (0 menit), 5 menit, 10 menit, 15 menit yang di injeksi ozone. Keempat, pengujian total jamur <em>C. citri</em> yang mati. Jamur <em>Capnodium citri </em>diperoleh dari tanaman jambu (<em>Psidium guajava</em>) yang diletakkan ke dalam cawan petri dan dibawa ke laboratorium. Jamur <em>Capnodium citri</em> dibawa melalui transportasi dengan waktu 30 menit. Jamur <em>Capnodium citri</em> kemudian dibagi menjadi 4 kelompok (Kontrol, 5 menit, 10 menit, 15 menit) yang di injeksikan ozone. Dari hasil pengujian yang optimum dilakukan didapatkan bahwa paparan ozon diwaktu 15 menit adalah yang paling efektif sebagai desinfeksi dan begitu juga pada efek paparan ozon pada 15 menit terlihat hancur dinding selnya.</p>2023-09-14T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/8229Effectiveness of Aromatic Plants on The Population and Intensity of Aphis gossypii Pest Attack on Plant Cucumis sativus2022-03-02T17:17:12+07:00Rika Ningtiasrikant2797@gmail.comNanang Tri Haryadirikant2797@gmail.com<p><em>The control of plant-disturbing organisms particularly in cucumber plant pests, such as the aplications of chemical and vegetable pesticides. The use of chemical pesticides dosis that is determined made the pests more resistent than normal dosis. Reduction of chemical pesticides can be done with a polyculture cropping system using aromatic plants. The purpose of this study was to determine the effect of aromatic plants on population, intensity of pest attacks, and production yields in cucumber plants, then find out the most effective treatment to suppress populations of pest. This research conducted in Tanjung Rejo Village, Wuluhan District, Jember in January to July 2021. The research design used a randomized block design with 4 treatments that is P0 (control), P1 (basil), P2 (leek), and P3 (celery) which is repeated 6 times. The observed variabels were the population of pest, intensity of pest attaks, and cucumber productions. The data obtained were tested with ANOVA and if it were significantly different, further tests were carried out using Duncan Multiple Range Test with a level of 5%. Based on the result of this study, it showed that the types of aromatic plants has an effect on Aphis gossypii pests in cucumber plants with significantly different effects every week. The highest population and intensity of pest damage in P0 (control) treatment is 32,91 tails/ plants and intensity of pest damage is 21,08 %/ plants. The most effective treatment that can suppress the population of pest in basil treatment is 20,48 tails/plant and intensity of pest damage is 15,69 %/plants. The highest cucumber production in the basil treatment is 10,25 tons/Ha and the lowest cucumber production in the control treatment is 8,5 tons/Ha.</em></p>2023-10-13T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/14032Usage of Jatropha curcas as Botanical Insecticide in Controlling Insect Pest 2023-10-13T18:04:05+07:00Asmanizarasmanizar_az@fp.uisu.ac.id<p>Insect pests can cause damage to plants and cause losses. Insect pests on plants need to be controlled both preventively and curatively. Integrated control is an integration of several control methods that can be implemented in a compatible and comprehensive. Insect pest control using bio-active plant materials as an alternative to synthetic chemicals. Plants produce secondary metabolite compounds that can affect insects, including Jatropha curcas (Euphorbiaceae). Studies on several insect pests both in the laboratory and in the field against insect pests that attack the field and agricultural product storage warehouses have been carried out to determine their effectiveness. Jatropha curcas plants/parts of plant were applied after extraction treatment with various solvents (water, ethanol, methanol, acetone, petroleum ether, n-hexane and chloroform) or direct use. The results showed that J. curcas exhibited control effects against several types of insect pests from various insect pest. Laboratory study showed the insecticidal effect of J. curcas against Helicoverpa armigera, Spodoptera frugiperda, Plutella xylostella, Earias insulata, Spilarctia oblicua, Tuta absulata, Nezara viridula, Corcyra cephalonica, Maruca vitrata. Field study showed population reduction of Putella xylostella and Aphis craccivora. Whilst, on stored product study showed mortality of insect pest (Sitophilus zeamais, Rhyzopertha dominica, Callosobruchus chinensis and C. maculatus) and reduction of weight loss of stored products. Jatropha curcas has the potential as a pest insect control to be integrated into the IPM component.</p> <p><strong><em>Keywords:</em></strong> <em>Jatropha curcas, Botanical insecticide, Insect pest</em></p> <p> </p>2023-10-13T00:00:00+07:00Copyright (c) 2023 Jurnal Pertanian Tropik