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ANGGIT AN NASHIRUL

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Abstrak (Bhs. Indonesia)

Tomat (Lycopersicum esculentum Mill.) merupakan produk hortilkultura yang memiliki nilai ekonomi tinggi. Penyakit layu bakteri yang disebabkan oleh Ralstonia solanacearum pada tanaman tomat telah banyak menimbulkan kerugian dan penurunan produksi. Pengendalian penyakit yang sering dilakukan petani masih bertumpu pada aplikasi pestisida sintetik yang dapat berdampak negatif, karena itu perlu dilakukan alternatif pengendalian menggunakan agensia hayati berupa jamur antagonis yang relatif murah dan ramah lingkungan. Penelitian ini bertujuan untuk mendapatkan isolat jamur Trichoderma sp. (jahe, neneas, bawang merah, pisang) yang mempunyai kemampuan unggul dalam menghambat pertumbuhan R. solanacearum melalui uji in planta pada tanaman tomat. Penelitian dilaksanakan di Laboratorium dan Rumah Kaca Perlindungan Tanaman, Fakultas Pertanian, Universitas Jenderal Soedirman, Purwokerto. Penelitian dilaksanakan dari bulan April 2013 sampai Juli 2013. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan 7 perlakuan dan 4 kali ulangan. Perlakuan RAK yang dicoba meliputi: kontrol, kontrol R. solanacearum, bakterisida, Trichoderma sp. isolat (jahe, nenas, bawang merah, pisang). Variabel yang diamati adalah masa inkubasi, intensitas penyakit, populasi akhir, tinggi tanaman, jumlah daun, panjang akar, bobot segar akar, dan bobot segar tanaman. Hasil penelitian menunjukkan bahwa daya hambat empat isolat Trichoderma sp. belum mampu menekan R. solanacearum dan meningkatkan pertumbuhan tanaman tomat.

Abtrak (Bhs. Inggris)

Tomato (Lycopersicum esculentum Mill.) is hortilcultural products that have high economic value. Bacterial wilt caused by the Ralstonia solanacearum on tomato crops has great a losses and declining production. Control of the disease which is often done by farmers still relies on the application of synthetic pesticides that can have a negative impact. Therefore it is necessary to use alternative control by using biological agents such as antagonistic fungus that is relatively inexpensive and environmental friendly.This study aimed at gaining Trichoderma sp. isolates (ginger, pineapple, shallot, banana)having superior ability to inhibit the growth through in planta on tomato crop. The research was conducted at the Laboratory of Plant Protection and the screen House, Faculty of Agriculture, Jenderal Soedirman University, Purwokerto started from April to July 2013. Randomize Block Design was use in in planta test with 7 treatments and 4 replicates. The treatments in in planta test were control, Ralstonia solanacearum, bactericide, and Trichoderma sp. isolates (ginger, pineapple, shallot, banana). Variable observed was incubation period, disease intensity, late population, crop height, number of leaves, root length, root fresh weight, and crop fresh weight. Result of the research showed that inhibition ability of four Trichoderma sp. isolates had not been able to control Ralstonia solanacearum and to increase growth tomato growth.

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