Judul: Eliminasi PMWaV (Pineapple Mealybug Wilt-associated  Virus) dari jaringan tanaman nanas melalui perlakuan air  panas dan ribavirin
Abstrak: Mealybug wilt of pineapple (MWP) is the devastating disease found in all the major pineapple growing regions of the world. The disease is characterized by severe tip dieback, downword curving of the leaf margins, reddening, and wilting of the leaves that can cause total collapse of the plant. Closterovirus particles were detected in both MWP symptomatic and asymptomatic pineapple worldwide. The particles, referred to as Pineapple Mealybug Wilt-associated Virus-1 and PMWaV-2. Both viruses are mealybug transmitted. Two species of mealybug, the pink mealybug Dysmicoccus brevipes (Cockerell), and the grey mealybug Dysmicoccus neobrevipes (Beardsley) have been associated with MWP. One method for managing MWP disease is rogue symptomatic plant, but this method remain PMWaV at asymptomatic plant. Use of pesticide to control mealybug and ants is not efficient and high cost. The research was conducted to develop elimination method for PMWaV-free plant by hot water treatment and ribavirin. PMWaV infected plant (leave, stem, crown) were given two hot water treatment consisting of 35 ºC for 24 hour as pre-treatment followed immediately by hot water treatment either 56 ºC for 60 minute or 58 ºC for 40 minute in a water bath. Infected plant without hot water treatment as positive control, and healthy plant without hot water treatment as negative control. Ribavirin were added to medium culture 10 mg/l medium. PMWaV infection can be eliminated from propagative material through hot water treatment 58 ºC 40 minute in a water bath without decrease propagative material viability.
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Judul: Peranan strain pineapple mealybug wilt associated virusdan kutu putih dalam menginduksi gejala layu pada tanaman nanas
Abstrak: ARTA JUNITA HUTAHAYAN. The Role of Pineapple Mealybug Wiltassociated Virus Strain and Mealybug (Dysmicoccus spp.) in Inducing Wilt Symptom on Pineapple Plants. Dibimbing oleh GEDE SUASTIKA dan SOBIR Indonesia is a tropic country which have potential to produce exotic fruits like pineapple. Pineapple is very important fruit for world trade. Indonesia is the third largest pineapple tin exporter after Philippine and Thailand. The main problem in pineapple cultivation is wilt disease. Mealybug wilt of pineapple (MWP) is currently present in pineapple-growing areas of West Java, Indonesia. MWP is characterized by severe tip dieback, downward curling, reddening, and wilting of the leaves which can lead to total collapse of the plant. Mealybug feeding on the pineapple plant has been associated with MWP symptom. Furthermore, flexuous rod-shaped virus particles, designated Pineapple mealybug wilt-associated virus (PMWaV) have been isolated from both symptomatic and asymptomatic pineapple plants. PMWaV is actually a complex of at least two different viruses, PMWaV-1 and PMWaV-2 that are transmitted by mealybug. The objectives of this research are to study the role of PMWaV isolates infection and mealybug feeding in inducing wilt symptom on pineapple plants, and to study the incidence of MWP in pineapple-growing areas of Indonesia. Survey for MWP were conducted in pineapple production areas of East Java (Blitar), West Java (Subang and Bogor), and North Sumatera (Simalungun). The incidence of the disease in all of the areas surveyed were found to be ranging from 50% to 90%. These results indicated that MWP has already spread widely in pineapple-growing areas of Indonesia. Transmission of PMWaV from infected pineapple plant to the pineapple test plants using mealybugs Dysmicoccus spp. under greenhouse condition were successfully conducted. The symptoms on the test plants were the same as that on naturally infected plants. The plants inoculated with virus and colonized by mealybug produce more severe symptoms than the plants inoculated with virus only. This indicated that PMWaV infection and mealybug feeding play important role in inducing wilt symptom. But, some pineapple plants surveyed on the field showing MWP symptoms without colonized by mealybug. This finding suggested that PMWaV likely to be the most important causal agent of the MWP, and mealybug feeding making the symptom more severe.
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Judul: Faktor-faktor yang memengaruhi Preferensi Mahasiswa terhadap Tabungan Syariah: Studi Kasus Sekolah Tinggi Ekonomi Islam Tazkia
Abstrak: Perbankan syariah adalah lembaga keuangan yang sedang berkembang saat ini namun nasabah perbankan syariah tergolong masih sedikit. Mahasiswa merupakan salahsatu kalangan yang berperan penting dalam pembangunan Ekonomi Islam dimasa yang akan datang serta salahsatu kalangan yang berpotensi besar bagi pasar perbankan syariah. Adapun tujuan dari penelitian ini yaitu mengidentifikasi pengetahuan dan persepsi mahasiswa terhadap tabungan syariah serta menganalisis faktor-faktor apa saja yang memengaruhi preferensi mahasiswa terhadap tabungan syariah. Data yang digunakan dalam penelitian ini adalah data yang diambil melalui kuesioner online dan data yang diambil dari berbagai literatur. Metode yang digunakan dalam penelitian ini yaitu analisis deskriptif dan analisis regresi logistik. Hasil analisis deskriptif menunjukkan bahwa pengetahuan berada dalam kategori sangat baik, dan kepercayaan serta fasilitas berada dalam kategori baik. Sedangkan hasil analisis logistik menunjukkan pada taraf nyata 5% ada dua variabel yang signifikan yaitu pemasukan dan pengetahuan, dan pada taraf nyata 10% ada dua variabel yang signifikan yaitu promosi dan kepercayaan.
Keyword: Faktor, Mahasiswa, Preferensi, Regresi Logistik, Tabungan Syariah