21 research outputs found
Kajian Hindola spp. sebagai vektor Xylem Limited Bacterium (XLB) penyebab Sumatera disease tanaman cengkeh
No full textPemberian Agrimicin, Abu Sekam, Ekstrak Bawang Merah dan Bawang Putih Pada Tanah Terkontaminasi Pseudomonas solanacearum Untuk Pertanaman Jahe
No full textThe application of hull ash, onion and garlic extracts on the soil for ginger plantation infected by Pseudomonas solanacearum.A pathogen of ginger rhizome rot (bacterial wilt) to persist in the soil and therefore becomes a threat to the following ginger crop. Such problem always arises despite the manipulation of the soil conditions, as long as ginger is available as host on the land.A green house trial applying Agrimicin, ash of rice husk, extract of onion and garlic was conducted at Balittro (Research Institute for Spices and Medicinal Crops), Bogor, in an effort to minimize the disease intensity.The results showed that the application of rice hust ash or onion extract suppressed the disease intensity on ginger up to months after transplanting. The Agrimicyn could only suppressed the disease up to 44 days after transplanting and the infection intensified rapidly there after to reach a rate of 55%, at the age of 71 days.These results open an opportunity to growing ginger continuously on the same land provided that the crop is harvested early, at the age of 3 months
Penyakit Tanaman Meniran di Kebun Percobaan Sukamulya
No full textDisease of meniran (Phyllanthus niruri L.) at Sukamulya Experimental Garden. Disease of Phyllanthus niruri L. at Sukamulya Experimental Garden, Sukabumi West Java was studied from December 1993 up to May 1994. The symptom is foot rol disease then plants die. The casual agents are two kinds of fungi, namely Rhizoctonia sp. Causing foot rot and Fusarium sp. Causing stem rot of the plant, both of them showed obvious wilt symptom. The result combination of inoculation with Rhizoctonia sp. And Fusarium sp. has caused disease occurrence more severe
Application of Nonlinear Site Response Analysis in Coastal Plain South Carolina
Full text linkThe 1933 Long Beach, 1957 San Francisco, 1967 Caracas, 1985 Mexico City, 1989 Loma Prieta, and 1994 Northridge earthquake events left evidences of how the local site condition can affect the characteristics of propagating earthquake wave from the bedrock through the top soil. The ground motion amplitude, frequency content or the duration can be affected by the local site condition and thus can cause significant amplification or de-amplification to the original bedrock motion which can seriously affect the structures. Quantification of such site effect on ground motions is a challenging task. This dissertation is dedicated to improve the existing ground response quantification techniques and the related knowledge base. The first major attempt towards ground response quantification was the development of the 1994 NEHRP (BSSC, 1995) seismic site factor provision. Since the development of the NEHRP provisions, several studies have found these factors to produce inadequate predictions for the state of South Carolina. In an attempt to generate seismic site factors based on conditions specific to South Carolina Coastal Plain (SCCP), a series of nonlinear one-dimensional ground response analyses are performed by this author as part of a research team considering appropriate soil profiles and location specific ground excitations. After the generation of this new site factor model, a systematic repercussions study is performed by applying earthquake loads, considering both NEHRP and the new site factors, on typical highway bridge structures
Pengamatan Pendahuluan Penyakit Pala di Maninjau
No full textDi Maninjau, Sumatera Barat telah dilaporkan adanya penyakit pala yang merisaukan petani karena menyebabkan kematian tanaman. Penyakit tersebut terus menyebar sehingga dikhawatirkan akan memusnahkan tanaman pala jika tidak dilakukan pencegahan sesegera mungkin. Selama kurang lebih 2 tahun telah dilakukan penelitian lapangan untuk mengetahui penyebab penyakit melalui pengamatan gejala penyakit dan epidemiologi serta isolasi mikroorganisma. Survey penyakit tersebut dilakukan di desa Sigiran, Batu Nanggai dan Leter W kec. Tanjung Raya kab Dati II Agam. Gejala penyakit pala di Maninjau hamper sama dengan gejala penyakit bakteri pembuluh kayu cengkeh. Dari hasil isolasi mikroorganisme dari jaringan tanaman (akar, batang, cabang/ranting) diperoleh beberapa pathogen yaitu bakteri Pseudomonas sp., Bakteri lain (7) dan jamur (Cylindrocladium sp.) Fusarium., jamur akar hitam (7). Botryodiploidia sp. Rhizoctonia sp., Penyebab penyakit ini diduga bakteri, dan/atau jamur akar serta factor lingkungan dan perlakuan kultur teknis membantu berkembangnya penyakit
