Update Artikelilmiah: 9709

NURUL FAJRIAN

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Abstrak (Bhs. Indonesia)

Penelitian ini bertujuan untuk mengetahui keefektifan beberapa mikroba antagonis untuk mengendalikan penyakit hawar daun dan mengetahui pengaruh beberapa mikroba antagonis terhadap pertumbuhan dan hasil kentang in planta. Penelitian dilaksanakan di Laboratorium Perlindungan Tanaman dan screen house di Desa Serang, Kecamatan Karangreja, Kabupaten Purbalingga dengan ketinggian tempat 1285 m dpl (di atas permukaan laut) mulai Maret sampai dengan Juni 2014. Penelitian menggunakan Rancangan Acak Kelompok dengan 4 ulangan. Perlakuan terdiri atas kontrol, P. fluorescens P60, P. fluorescens P60 + P. fluorescens P8, P. fluorescens P60 + Trichoderma sp., P. fluorescens P60 + P. fluorescens P8 + Trichoderma sp., dan fungisida berbahan aktif Mankozeb dan Propineb. Variabel pengamatan meliputi komponen patosistem (masa inkubasi, laju infeksi, intensitas penyakit, dan populasi akhir mikroba antagonis), komponen pertumbuhan (tinggi tanaman, jumlah cabang, jumlah daun, bobot tanaman segar, bobot tanaman kering, bobot akar segar, bobot akar kering), komponen hasil (jumlah umbi, bobot umbi), dan analisis senyawa fenol. Hasil penelitian menunjukkan bahwa perlakuan dengan menggunakan gabungan P. fluorescens P60, P. fluorescens P8, dan Trichoderma sp. yang disemprotkan pada bagian tanaman efektif mampu menekan intensitas penyakit sebesar 82%. Perlakuan dengan menggunakan beberapa mikroba antagonis cukup efektif untuk meningkatkan tinggi tanaman sebesar 17,06%, bobot tanaman segar sebesar 74,54%, dan bobot tanaman kering sebesar 93%, dan bobot umbi sebesar 28%, namun belum efektif dalam meningkatkan jumlah umbi.

Abtrak (Bhs. Inggris)

This research aimed at knowing the effectiveness of several antagonists to control the disease and on growth and yield on potato in planta. This research was carried out at the Laboratory of Plant Protection and the screen house at Serang Village, Karangreja Sub-District, Purbalingga Regency at altitude of 1285 m above sea level started from March to June 2014. Randomized block design was used with four replicates. The treatments were control, P. fluorescens P60, P. fluorescens P60 + P. fluorescens P8, P. fluorescens P60 + Trichoderma sp., P. fluorescens P60 + P. fluorescens P8 + Trichoderma sp., and fungicide with  active ingredients of Mankozeb and Propineb. Variables observed were patho-system components (incubation period, infection rate, disease intensity, and late populations of the antagonists), growth components (crop height, number of branches, number of leaves, fresh weight of crops, dry weight of crops, fresh root weight, dry weight of root), yield components (number of tubers, tuber weight), and phenolic compounds analysis. Results of the research showed that combination treatment of P. fluorescens P60, P. fluorescens P8, and Trichoderma sp. with spraying application on the crops was effective to suppress the disease as high as 82%. The treatment was effective to increase crop height, fresh weight of crops, dry weight of crops, and tuber weight as 17.06, 74.54, 93, and 28%, respectively, but it wasn’t effective to increase number of tubers.

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