Browsing by Author "Purwanti ...[at al], Haeni"

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    Evaluasi Galur Jagung Tetua yang Tahan dan Rentan terhadap Penyakit Bulai (Peronosclerospora maydis)
    (Balai Penelitian Bioteknologi dan Sumberdaya Genetik Pertanian, 2002-11) Purwanti ...[at al], Haeni; Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumberdaya Genetik Pertanian
    Penyakit bulai jagung merupakan salah satu kendala yang menyebabkan penu-runan produksi jagung. Di Indonesia, penyakit bulai jagung disebabkan oleh Peronosclerospora maydis. Penyakit ini merupakan perusak serius di sentra produksi jagung. Varietas jagung tahan bulai sangat diperlukan untuk peningkat-an produksi jagung. Hasil uji di lapang maupun screen house telah ditetapkan dan dievaluasi galur Nei9202 (Thailand), IPB9204-1-3-1-2-4-B (Filipina), dan J2-375-1-1-1-1f (Indonesia) sebagai tetua tahan dan galur G26C25HS45-3-4-1-6-BBBB, CML356, dan CML358 (CIMMYT) sebagai tetua yang rentan. Secara fenotip persilangan yang cukup berhasil adalah pasangan G26C25HS45-3-4-1-6-BBBB x J2-375-1-1-1-1f.
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    Penyakit Hawar Pelepah Daun Padi (Rhizoctonia solani Kuhn): Permasalahan dan Prospek Pengendaliannya di Indonesia
    (Balai Penelitian Bioteknologi Tanaman Pangan, 1997) Purwanti ...[at al], Haeni; Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumberdaya Genetik Pertanian
    Sheath Blight Disease of Rice (Rhizoctonia solani Kuhn): Problems and Prospects of Various Disease Control Measures in Indonesia. H. Punvanti, M.K. Kardin, A. Nasution, and Sutoyo. Sheath blight caused by Rhizoctonia solani Kuhn is one of the most important diseases of rice in Indonesia. Damage increases due to the wide spread cultivation of modern high yielding rice varieties which are susceptible to the pathogen and the adoption of new technologies such as close spacing and high application of nitrogen fertilizer, which are suitable for the development of the disease. So far, no resistant rice variety is available. Biological control using antagonistic microbes has been explored, although still at green house and limited field experiments. Sanitation and proper use of nitrogen fertilizer are recommended to minimize damage by sheath blight disease. Several fungicides are effective to control the pathogen, but due to the environment concerns and low economic value of rice, chemical control should be used as the last resort, in the future, cultivation of transgenic plants inserted with chitinase gene(s) might help to improve disease management of sheath blight of rice.