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All Journal Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Warta Perkaretan
Alchemi Putri Juliantika Kusdiana
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Materials Science & Nanotechnology

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POLA PRODUKSI DAN INDEKS LUAS DAUN PADA TANAMAN KARET YANG TERSERANG Pestalotiopsis Martini Aji; Alchemi Putri Juliantika Kusdiana
Warta Perkaretan Vol. 40 No. 2 (2021): Volume 40, Nomor 2, 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.v40i2.842

Abstract

Secaraalami,tanamankaretmenggugurkandaunsebagairesponskekeringan untuk mengantisipasi defisit air tanah pada proses transpirasi. Pengurangan jumlah daun pada tanaman karet tidak hanya terjadi akibat periode gugur daun saja, namun adanyakejadianpenyakitdaunsepertipenyakit gugur daun Pestalotiopsis juga dapat mengakibatkan tanaman melakukan gugur daun. Gugur daun dan pembentukan daun baru akan berpengaruh terhadap nilai indeks luas daun dan produksi lateks. Penelitian dilakukandiKebunPercobaanPusatPenelitian Karet Sembawa, Sumatra Selatan, pada klon PB 260 tahun tanam 2005 dan BPM 24 tahun tanam 2004 untuk mengetahui pola produksi dan nilai indeks luas daun yang terserang penyakit gugur daun Pestalotiopsis. Pengamatan yang dilakukan meliputi produksi lateks selama satu tahun, serta pengukuran indeks luas daun dan keparahan penyakit setiapbulanselamasatutahun.Hasilpenelitianmenunjukkanpenurunannilaiindeks luas daun tidak berpengaruh secara langsung terhadap penurunan produksi lateks, namunpadasaattanamanmelakukanpembentukandaunbaru(nilaiLAImeningkat),produksilateksmengalamipenurunanyangsignifikan.Selainitu,peningkatan keparahan penyakit gugur daun Pestalotiopsis memiliki hubungan yang cukup kuat dengan penurunan indeks luas daun tanaman. Pada saat keparahan penyakit tinggi dan terjadi gugur daun, indeks luas daun menurun hingga mencapai 0,5.
The Exploration of Endophytic Fungus from Leaves Rubber Plants and Their Potential Antagonism Againts Colletotrichum gloeosporioides Leaf Fall Disease Rani Adha Nisaq; Syamsul Bahri; Yenni Marnita; Alchemi Putri Juliantika Kusdiana
Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Vol 21 No 1 (2023): Jurnal Agroqua
Publisher : University of Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/ja.v21i1.3623

Abstract

This study aims to explore endophytic fungi found on the leaves of healthy rubber plants and determine their antagonistic potential against Colletotrichum gloeosporioides leaf fall disease in vitro using Potato Dextrose Agar media with the Dual Culture method. Almost all parts of the rubber plant can be infected with a number of plant diseases, one of which attacks the leaves. Leaf fall disease can be detrimental because fallen leaves can cause plant growth to be inhibited, and sap or latex production will decrease and can even result in death of the plant. An alternative to controlling diseases that have attacked widely is to use biological control by exploration. Exploration is carried out to obtain beneficial biological control materials and is the first step in the implementation of biological control techniques. The research was conducted using a Non-Factorial Completely Randomized Design (CRD), namely by using PDA (Potato Dextrose Agar) solid media consisting of 4 replicates, as the treatment was an isolate of endophytic fungi from exploration and the isolate tested for antagonism was the Colletotrichum gloeosporioides fungus. The results of the percentage of inhibition on endophytic fungus isolates that are able to inhibit or suppress the growth of the mycelium of the C. gloeosporioides fungus with values ranging from 40% are only found in endophytic fungus isolate C (Arthobotrys Corda) in the P3 treatment with an average percentage inhibition of 40.94% which is included in the criteria for a medium percentage of inhibition.
Co-Authors Martini Aji Rani Adha Nisaq Syamsul Bahri Yenni Marnita