Potensi Trichoderma Spp. dalam Menekan Perkembangan Penyakit Busuk Pucuk Vanili di Pembibitan

Penyakit busuk pucuk vanili (BPV) yang disebabkan oleh Phytophthora capsici merupakan kendala pada pembibitan dan pertanaman vanili. Pengendalian penyakit umumnya menggunakan fungisida sintetik yang harganya mahal dan menyebabkan pencemaran lingkungan. Pengendalian penyakit dengan agens hayati sudah dikembangkan dan berhasil mengatasi penyakit busuk pangkal batang pada tanaman vanili. Penelitian ini bertujuan untuk mendapatkan isolat Trichoderma dari tanah, rizosfer dan jaringan tanaman vanili sebagai agens hayati terhadap P. capsici secara in vitro dan in vivo (pembibitan). Penelitian dilakukan di Laboratorium Mikologi Departemen Proteksi Tanaman IPB, Laboratorium Penyakit Balai Penelitian Tanaman Rempah dan Obat di Bogor, dan Rumah Kaca Balai Penelitian Tanaman Industri dan Penyegar di Sukabumi. Trichoderma spp. diisolasi dari risosfir dan jaringan tanaman vanili dari Serang, Sukabumi, dan Batu. Pengujian antagonisme in vitro dilakukan pada 17 isolat Trichoderma spp. menggunakan metode dual culture dan metode kertas cakram, sedangkan pengujian in vivo dilakukan pada 6 isolat Trichoderma spp. menggunakan media jagung dan metode penyemprotan suspensi konidia agens hayati. Peubah yang diamati adalah kejadian dan tingkat keparahan penyakit busuk pucuk pada vanili. Penelitian menggunakan rancangan acak kelompok dengan 3 ulangan. Hasil penelitian diperoleh 114 isolat jamur; 97 dari rizosfir, 11 dari tajuk dan 6 dari akar (endofit). Hasil pengujian patogenisitas menunjukkan bahwa 63 isolat bersifat patogenik pada tanaman vanili (umumnya genus Fusarium) dan 51 isolat tidak patogenik (umumnya Trichoderma). Daya hambat in vitro isolat Trichoderma spp. terhadap P. capsici berkisar antara 44,5-73,5%, sedangkan dengan metode cakram daya hambatnya 6,3-75%. Keefektifan 6 isolat Trichoderma spp. menekan perkembangan penyakit busuk pucuk pada bibit vanili berkisar antara 66,67-68,00%. Hasil penelitian mengindikasikan bahwa ada beberapa isolat Trichoderma spp yang berpotensi sebagai agens hayati untuk menekan perkembangan penyakit busuk pucuk vanili yang disebabkan oleh P. capsici. Potential of Trichoderma spp. To suppress development of the shoot rot disease of vanilla in nurseriesABTRACT Shoot rot disease of vanilla (BPV) is caused by Phytophthora capsici is a constraint on the seedling and planting vanilla. Disease control generally use synthetic fungicides are expensive and cause environmental pollution. Disease control with biological agents has been developed and successfully overcome the base of the stem rot disease in vanilla plants. This study aims to obtain isolates of Trichoderma from soil, rhizosphere and plant tissue vanilla as a biological agent against P. capsici in vitro and in vivo (seedling). Mycological Research conducted at the Laboratory of Plant Protection Department of IPB, Laboratory Center for Disease Spices and Medicinal Plants Research in Bogor, and Greenhouse Crops Research Institute for Industry and freshening in Sukabumi. Trichoderma spp. isolated from plant tissue, rizosphere and vanilla from Serang, Sukabumi, and Batu. Invitro antagonism test performed on 17 isolates of Trichoderma spp. using the dual culture method and the method of the paper disc, whereas in vivo tests carried out on six isolates of Trichoderma spp. using corn media and methods of spraying conidia suspensions of biological agents. Observed variable is the incidence and severity of shoot rot disease in vanilla. Research using randomized block design with three replications. The results obtained 114 isolates of the fungus; 97 of the rizosphere, 11 of the canopy and 6 of the root (Endophytic). The results of pathogenicity tests showed that 63 isolates are pathogenic on plants vanilla (generally Fusarium) and 51 isolates were not pathogenic (generally Trichoderma). The inhibition of in vitro isolates of Trichoderma spp. against P. capsici ranged from 44.5 to 73.5%, while the disc method hambatnya power from 6.3 to 75%. The effectiveness of six isolates of Trichoderma spp. suppress the development of bud rot disease in vanilla seeds ranged from 66.67 to 68.00%. The results indicate that some isolates of Trichoderma spp as potential biological agents to suppress the development of shoot rot disease of vanilla caused by P. capsici

Seleksi Dan Identifikasi Jamur Antagonis Sebagai Agens Hayati Jamur Akar Putih Rigidoporus Microporus Pada Tanaman Karet

Jamur akar putih (Rigidoporus microporus) merupakan patogen utama pada tanaman karet yang sulit pengendaliannya karenamempunyai struktur bertahan dalam tanah (klamidospora). Pengendalian hayati dengan jamur antagonis sangat potensial digunakanuntuk mengendalikan patogen tular tanah. Penelitian ini dilaksanakan di Laboratorium Balai Penelitian Tanaman Industri danPenyegar, mulai Februari sampai Juli 2012 dengan tujuan untuk menyeleksi dan mengidentifikasi jamur antagonis yang potensialmengendalikan patogen R. microporus pada tanaman karet. Penelitian terdiri dari dua tahap, yaitu (1) pengambilan sampel padabeberapa perkebunan karet di daerah Lampung, Sumatera Selatan, Jawa Tengah dan Jawa Barat dan (2) isolasi, seleksi, karakterisasimorfologi dan identifikasi di Laboratorium Proteksi Tanaman, Balai Penelitian Tanaman Industri dan Penyegar. Hasil isolasi jamurantagonis dari rizosfer dan akar tanaman karet diperoleh 209 isolat. Berdasarkan persentase daya hambat terseleksi 12 isolat antagonis,yaitu 8 isolat rizosfer (Trichoderma virens, 2 isolat Trichoderma hamatum, 2 isolat Trichoderma amazonicum, Penicillium pinophilum,Paecilomyces lilacinus, dan Aspergillus Fijiensis), dan 4 isolat endofit (Eupenicillium javanicum, Penicillium simplicissimum, Penicillium citrinum,dan Hypocrea atroviridis). Kedua belas isolat tersebut merupakan jamur antagonis potensial untuk mengendalikan penyakit JAP padakaret.Kata Kunci: Rigidoporus microporus, seleksi, identifikasi, jamur antagonisWhite root disease caused by Rigidoporus microporus is the main pathogen in rubber growing. The diseases is hard to be controlled because of itschlamydospore in soil. The use of antagonistic fungi is a potential approach being able to control the soil borne disease. A study was established atlaboratory of The Indonesian Research Institute for Industrial and Beverage Crops from February to July 2012. The objective of the study was to selectand identify some antagonistic fungi which are able to control R. microporus in rubber. The steps of study conducted were (1) collecting of soilsamples (as sources of antagonistic fungi) taken from several rubber plantations in Lampung, South Sumatra, Central Java and West Java, and (2)isolation, selection, and identification of morphological characteristics of the isolates at the Plant Protection Laboratory of The Research Institute.Results obtained 209 isolates of antagonistic fungi from rhizosphere and endophyte in rubber. There are 12-selected antagonistic isolates consisting of8 rhizosphere and 4 endophytic isolates. The rhizosphere isolates are Trichoderma virens, 2 isolates of Trichoderma hamatum, 2 isolates ofTrichoderma amazonicum, and one each of Penicillium pinophilum, Paecilomyces lilacinus, and Aspergillus Fijiensis), whereas theendophytic isolates are Eupenicillium javanicum, Penicillium simplicissimum, Penicillium citrinum, and Hypocrea atroviridis of oneeach. The twelve isolates are antagonistic fungi in which the white root disease may be likely controlled

Isolation and Selection of Endophytic Fungi From Cacao as Biocontrol Agents of Phytophthora Palmivora Butl.

Phytophthora palmivora Butl. is a causal pathogen of black pod rot of cocoa (BPR) which leads to severe crop losses. Control of P. palmivora using biological agents such as endophytic fungi is most recommended for its environmentally friendly benefits. The aim of this research was to obtain endophytic fungi from cacao plant that works as biological agent against P. palmivora. The research was conducted at Plant Protection Laboratory, Indonesian Industrial and Beverage Crops Research Institute (IIBCRI), Sukabumi, from January to July 2015. The exploration for endophytic fungi was carried out in cacao producing regions such as Southeast Sulawesi, West Java, and Lampung. The samples taken were of leaves, pods, and branches of a number of cacao varieties and clones. Isolated endophytic fungi were then being sterilized, selected, and studied in vitro using PDA medium and in vivo using cacao pod. The exploration obtained 269 endophytic fungi, consisted of 195 isolates from Southeast Sulawesi, 41 isolates from West Java, and 33 isolates from Lampung. The evaluation of endophytic fungi isolated from P. palmivora showed that there were 4 species of Trichoderma isolates which have potentials for biological agents to control P. palmivora, namely SWI, STII, PB5, and SWII with inhibitory effect of 70.33%; 68.89%; 67.43%; and 66.67%, respectively