Judul: Induksi Pembungaan dengan Penambahan Penyinaran dan Pengaruh Dmur Bunga terhadap Pembentukan Buah pada Hylocereus spp.
Abstrak: The aim of this research was to study the effect of extended light on flowering off season and to investigate if over anthesis flowers were potential for fruit production of Hylocereus spp. The study consisted of two experiments both were arranged in randomized complete block design (RCBD) with one factor. Lamp power (45 watts, 55 watts and without extended light) was the factor for the first experiment with 3 replications. In the second experiment flowers age was used as treatment, i.e. pollination at anthesis (0 hours after anthesis /HAA), 6, 12 and 18 HAA, and each was applied on 7 flowers. The results from the first experiment showed that extended light with 45 and 55 watts for 11 hours/day induced off season flowering in dragon fruit after 54 days. The development of induced flowers was similar to those on season flowers (19-21 days), yet fruit set of the off season flowers were only 39.5% (45 watts) and 66.6% (55 watts). From the second experiment it was found that pollination was successfully carried out at anthesis until 12 HAA with 100% fruit set and marketable fruit size. Pollination at 18 HAA though produced marketable fruit size; however the fruit set was only 14.3%.
Keyword: lamp, dragon fruit, day length, cross pollination

Judul: Pests and Diseases of Dragon Fruit (Hylocereus sp.) with Lamp Cultivation System in Banyuwangi Regency
Abstrak: Buah naga (Hylocereus sp.) merupakan salah satu komoditas hortikultura yang penting dan banyak dibudidayakan di Indonesia. Kehilangan hasil akibat hama dan penyakit pada tanaman buah naga belum banyak dilaporkan di Indonesia khususnya di Kabupaten Banyuwangi. Penelitian ini bertujuan mengamati hama dan penyakit tanaman buah naga dengan sistem budi daya berlampu pada perkebunan buah naga di Kabupaten Banyuwangi. Penelitian dilakukan dengan pengamatan hama dan penyakit secara berkala dan wawancara. Pengamatan lalat buah dilakukan dengan pemasangan perangkap methyl eugenol. Pengamatan dilakukan pada delapan lahan buah naga di Kecamatan Pesanggaran dan Siliragung. Identifikasi hama dan penyakit dilakukan dengan membandingkan gejala yang teramati di lapangan dengan literature yang sesuai. Hama pada tanaman buah naga yang paling banyak ditemukan di lahan pengamatan adalah lalat buah, semut, kutuputih, kutudaun, bekicot, dan tikus. Penyakit yang paling banyak ditemukan adalah putih sulur, busuk batang, kanker batang, antraknosa, bercak oranye, dan kuning sulur., Dragon fruit (Hylocereus sp.) is an important horticultural commodity that widely cultivated in Indonesia. Yield losses due to pests and dragon fruit diseases have not been reported in Indonesia, especially in Banyuwangi Regency. This research aims to observe the pests and diseases of dragon fruit cultivatedusing lamps in Banyuwangi Regency. The research was conducted by direct observation and interview, Observation and trapping fruitflieswere carried out on eight dragon fruit fields in the Pesanggaran and Siliragung Districts. Simple identification of pests and diseases is carried out by comparing the observed pest and diseases with the literature. . The most frequent pests observed in dragon fruit plantation were fruitflies, ants, mealybugs, aphids, snails, and rat. Then the most observed diseases symptoms were white tendrils, stem rot, stem cancer, anthracnose, orange spots, and yellow tendrils.
Keyword: buah naga, budidaya berlampu, hama, penyakit, dragon fruit, lamps-added cultivation, pests, diseases

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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