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All Journal Jurnal Penelitian Karet Warta Perkaretan SRIWIJAYA JOURNAL OF ENVIRONMENT
Alchemi Putri Juliantika Kusdiana
Indonesian Rubber Research Institute
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Education Energy Environmental Science Materials Science & Nanotechnology Public Health

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DIAGNOSIS PENYAKIT GUGUR DAUN KARET (Hevea brasiliensis Muell. Arg.) Alchemi Putri Juliantika Kusdiana
Jurnal Penelitian Karet JPK : Volume 38, Nomor 2, Tahun 2020
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v2i38.728

Abstract

One of the causal of the low rubber production is the presence of plant diseases. Important diseases in rubber plants generally cause symptoms of leaf fall, due to Colletotrichum spp., Corynespora sp., and Oidium sp. Currently, there is an incidence of new rubber leaf fall disease with symptoms that are different from the diseases previously found in rubber plantations. This disease is widespread in Sumatra, Kalimantan, and Southeast Asia. There are many suspicions about the pathogens that cause the disease, but there is no precise diagnosis. Therefore, an accurate diagnosis is needed as a basis for determining an effective and efficient disease control strategy. This research was carried out to determine the causal agents of leaf fall disease with symptoms of round leaf spots that can cause leaf fall. Diagnosis was carried out by isolating the pathogen from several rubber clones, inoculating the pathogen to healthy rubber plants, identifying morphologically and molecularly, and re-isolating from inoculated plants. The results of Koch's postulates and morphological and molecular identification determined that the causal agents of leaf fall disease at rubber plants with round spots was the fungus Pestalotiopsis microspora.
PENGARUH KLON KARET TERHADAP EPIDEMI PENYAKIT GUGUR DAUN PESTALOTIOPSIS Alchemi Putri Juliantika Kusdiana
Warta Perkaretan Vol. 40 No. 1 (2021): Volume 40, Nomor 1, Tahun 2021
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.wp.v40i1.747

Abstract

Penyakit gugur daun Pestalotiopsis di Indonesia dilaporkan terjadi pada hampir semua jenis klon karet dengan tingkat keparahan penyakit yang berbeda. Salah satu strategi pengendalian penyakit gugur daun adalah dengan penggunaan klon yang resisten. Oleh karena itu, penelitian ini dilakukan untuk mengetahui pengaruh beberapa jenis klon karet terhadap terjadinya epidemi penyakit gugur daun Pestalotiopsis. Klon yang digunakan pada penelitian adalah klon RRIC 100, IRR 39, PB 260, BPM 24, dan GT 1. Dampak klon terhadap terjadinya epidemi dikaji melalui pengamatan kondisi tajuk tanaman menggunakan drone dan persentase keparahan penyakit di lapangan. Selain itu, dilakukan analisis hara tanaman dan data iklim untuk mengetahui hubungannya dengan keparahan penyakit gugur daun Pestalotiopsis di lapangan. Berdasarkan hasil analisis keparahan penyakit, nilai AUDPC, dan laju infeksi diketahui bahwa kelima klon berpengaruh nyata pada epidemi penyakit. Klon RRIC 100, IRR 39, dan PB 260 merupakan klon yang moderat tahan terhadap penyakit gugur daun, sedangkan klon BPM 24 dan GT 1 termasuk klon yang rentan terhadap penyakit gugur daun Pestalotiopsis. Berdasarkan kajian korelasi unsur kimia tanaman, diketahui bahwa hara tanaman seperti nitrogen, fosfat, dan kalium memiliki hubungan korelasi nyata dengan persentase keparahan penyakit. Analisis cuaca terhadap perkembangan penyakit gugur daun pada 5 klon karet menunjukkan hasil bahwa faktor cuaca seperti kelembapan, curah hujan, kecepatan angin, dan lama penyinaran matahari mendukung perkembangan penyakit gugur daun di lapangan.
The Growth of PB 260 Clone of Rubber Plant on Peatland Jamin Saputra; Alchemi Putri Juliantika Kusdiana
Sriwijaya Journal of Environment Vol 8, No 2 (2023): ENVIRONMENTAL TECHNOLOGY
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22135/sje.2023.8.2.109-114

Abstract

The expansion of the area for the cultivation of rubber plants is hampered by the fact that the availability of mineral land has begun to decrease, so many have started to plant rubber on marginal lands such as peatlands. Peatlands for agriculture have many limiting factors, but if peatlands are adequately managed with drainage as well as ameliorant and fertilizing inputs, then peatlands have the potential to be used as agricultural land. However, information on research results related to rubber cultivation on peatlands is still very limited, so this study was carried out to observe the growth of rubber plants of PB 260 clones on peatlands. The research was carried out for five years in Sungai Rengit Village, South Sumatra, using rubber planting material in a polybag of PB 260 clones. The observations' parameters were stem girth, peat water level, and peat subsidence. The results showed that the growth of PB 260 clones during the immature plant period on peatland was not significantly different from rubber plants on mineral soils. At the research location, there was never any puddle and the peat water level was maintained because the drainage channels were well made. During the five years of observation, the highest peat water level occurred in the rainy season at 27 cm from the peat surface, while the lowest peat water level occurred in the dry season, which was more than 150 cm from the peat surface. The peat decline reached 25 cm during the five years of observation
Co-Authors Jamin Saputra