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KARAT DAUN ( Hemilieia vastatrix ) PADA TANAMAN KOPI ARABIKA DI PERKEBUNAN RAKYAT LAMAKNEN SELATAN Fadillah, Resti; Pitaloka, Maria D. A.; Humoen, Maria Imelda; Banamtuan, Elesta; Leo, Maria Y. M. K.; Andiewati, Suci; Rohi, Jullyo Gideon
Jurnal Agrotek Tropika Vol. 13 No. 1 (2025): JURNAL AGROTEK TROPIKA VOL 13, FEBRUARI 2025
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jat.v13i1.8277

Abstract

South Lamaknen District is the center of coffee production in Belu Regency. Coffee production is influenced by external and internal factors, H. vastatrix attacks are among the main external factors that limit coffee production in this district. Data information related to leaf rust disease in Belu district does not yet exist. Data on the distribution and severity of coffee leaf rust disease in this district do not yet exist. Such data is needed to determine appropriate control strategies to improve coffee production. The study aimed to obtain data on the severity of coffee leaf rust disease in smallholder coffee plantations in Belu Regency. The research method used was purposive random sampling (PRS) in the Belu people's coffee center in Lakmaras and Henes Villages, South Lamaknen District, with a geographical location between 9 ْ0.9' 26.61"N and 125 ْ 09' 50" LS, at an altitude between 866,7 – 1007,7 m above sea level. This study shows that coffee leaf rust disease is spread in geographical locations 9 ْ 0.9' 26.61"N and 125 ْ 09' 50" LS. The highest intensity of coffee leaf rust disease occurred in Henes village, which was 39%, while Lakmaras village was 22%. External factors affecting the incidence and severity of disease are temperature and use distance between coffee plants.
ANALISIS METABOLIT GULMA PENTING PERTANAMAN JAGUNG DI NUSA TENGGARA TIMUR Kefi, Andreas; Bria, Deseriana; Humoen, Maria Imelda; Banu, Marselinus
Agros Journal of Agriculture Science Vol 26, No 1 (2024): Edisi APRIL
Publisher : Fakultas Pertanian, Universitas Janabadra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37159/jpa.v26i1.4362

Abstract

Planting corn is a local wisdom that is still practiced to maintain food availability in East Nusa Tenggara. In corn cultivation, the biggest challenge faced by farmers is the emergence of weeds around corn plants, which hinder their growth. Profiling the metabolites of weeds is an important initial step in studying the influence of allelochemical compounds that inhibit plant growth. This allows for appropriate weed control strategies. Chloris barbata is identified as a dominant weed in corn fields in East Nusa Tenggara. This study aims to profile the dominant weeds in corn fields in East Nusa Tenggara, specifically in Tua’tuka, Kupang Regency. The untargeted metabolit analysis of the three weed species revealed that Neophytadiene, accounting for 34.93% of Chloris barbata, is a compound strongly suspected to inhibit corn plant growth among the 36 compounds identified in the allelochemical study. The impact of allelochemicals from the other two weed species on corn growth needs further investigation due to limited information. Further studies are necessary to understand the effects of these allelochemicals on corn plant growth. Keywords: allelochemical; metabolites; weedsINTISARIMenanam jagung adalah suatu kearifan lokal yang masih terus dilakukan untuk menjaga ketersediaan pangan di Nusa Tenggara Timur. Dalam budidaya jagung, tantangan terbesar yang sering dihadapi oleh petani adalah munculnya gulma di sekitar tanaman jagung. Adanya gulma menyebabkan pertumbuhan tanaman jagung menjadi terhambat. Studi metabolit gulma merupakan langkah awal penting untuk mempelajari pengaruh senyawa alelokimia dalam menghambat pertumbuhan tanaman. Strategi pengendalian gulma dapat dilakukan dengan tepat. Chloris barbata merupakan salah satu jenis gulma yang telah diidentifikasi sebagai gulma dominan yang tumbuh pada pertanaman jagung di NTT. Penelitian ini bertujuan untuk melakukan analisis metabolit terhadap gulma dominan pada pertanaman jagung di NTT yang diambil dari Tua’tuka Kabupaten Kupang. Hasil analisis untargetted metabolit dari ketiga jenis gulma, menunjukkan bahwa Neophytadiene 34,93% dari Chloris barbata merupakan senyawa yang diduga kuat sebagai penghambat pada pertumbuhan tanaman jagung dari total 36 senyawa yang dihasilkan dari studi senyawa alelokimia. Dampak senyawa alelokimia dari dua jenis gulma lainnya terhadap pertumbuhan jagung masih perlu diteliti lebih lanjut karena keterbatasan informasi. Studi lanjutan diperlukan untuk memahami lebih dalam efek senyawa-senyawa alelokimia tersebut terhadap pertumbuhan tanaman jagung. Kata Kunci: alelokimia; gulma; metabolit
Tanggap Pertumbuhan dan Hasil Tanaman Jagung terhadap Waktu Tanam yang Berbeda Sudirman Yahya; Supijatno; Humoen, Maria Imelda
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 48 No. 2 (2020): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.748 KB) | DOI: 10.24831/jai.v48i2.30713

Abstract

Determination of the appropriate sowing date can reduce the negative impact of the low water availability and solar radiation in the growth phase and yield of maize. This research aimed to (1) determine the effective sowing date to get the optimal solar radiation, water, and yields, (2) determine the appropriate varieties for the sowing date to optimize the utilization of radiation and water. The experiment was conducted at the Agricultural Technology Assessment Station (BPTP) Naibonat, NTT from February to July 2019. The three-factor factorial experiment using a split-split plot design. The main plot, namely three sowing dates were 26 February 2019, 12 March 2019, and 26 March 2019. The subplots, namely three varieties of maize consisted of Pena muti m’naes, Lamuru, and Pioneer-36. The sub-sub plot, namely 2 levels of watering consisting of not watered and watered. The results showed that the sowing date of 12 March 2019, was the appropriate sowing date and corresponding with the level of availability of water and solar radiation with more efficient use and higher levels of solar radiation interception to provide Pioneer-36 production of 8.47 tons ha-1, which was better than the production of Local and Lamuru varieties of maize at other sowing dates. This is supported by the synchronized responses of both source capacity (leaf area) and sink capacity (ear size). Keywords: leaf area index, production, varieties, watering