Judul: Effect of Feeding Some Kinds of Mulberry Leaves (Morus spp.) to the Growth of Wild Silkmoth Attacus atlas L.
Abstrak: Attacus atlas is one of wild silkmoth which has higher economic value than domestic silkmoth Bombyx mori. Attacus atlas is polyfage insect which means it has more host plants even from different family. So, there is possibility that mulberry plant can use as food plant for A. atlas. This study aimed to customize feeding on A. atlas with mulberry leaves as feed and to know the effect of feeding with kinds of mulberry leaves to the growth and life cycle of A. atlas. The cocoon was collected from tea plantation in Purwakarta. Fertile eggs from mating imago was hatched. First instar was fed with four kinds of Mulberry leaves such Morus multicaulis, M. alba var. Kanva 2, M. cathayana and M. bombycis var. Lembang. All of reared larvas could not complete its life cycle. Larval fed with M. alba var. Kanva 2 only survived until first instar and could not moult. Larval fed with M. multicaulis survived until second instar. Larval fed with M. cathayana and M. bombycis var. Lembang survived until third instar. The highest percentages of survival had been achieve by larva fed with M. bombycis var. Lembang, that were 56,63% for first instar and 7,80% for second instar. Keyword : Attacus atlas, mulberry leaves, larval growth
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Judul: Upaya Intensifikasi Pemeliharaan Ulat Sutera Liar Attacus atlas L. (Lepidoptera : Saturniidae).
Abstrak: Wild silkworm Attacus atlas is one of Indonesian native insect which has high potential to be developed. The cocoons are superior compared with others types of silk, so various processed products can be made such as handicraft, clothes and art that has a high economic value. The cocoon retrieval from nature resulting in population decline of A. atlas in nature, therefore intensive indoor rearing of A. atlas with feed and mating management to increase production is necessary. The purpose of this research was to perform intensive effort of A. atlas rearing by examining the mating management and observed the effect of the feeding treatment on the growth of wild silkworm A. atlas. The research was divided into two phases. The first experiment focussed on mating management of A. atlas done by the different length of mating period of 3, 6, 12 and 24 hours to assess its effect on egg performance, including eggs laying period, number of eggs, the average weight of eggs, eggs hatching period and the hatchability. The second stage was the provision of two types of alternative feed (guava leaves and walnut leaves) with a different frequency of feeding (3 and 4 times a day) to observe its influence on larval growth. The results showed that the different of mating duration significantly affected (p<0.05) to number of eggs. The number of eggs of the mating for 6, 12 dan 24 hours was not significanly different for each 225.80 + 24.30 eggs, 245.00 + 50.70 eggs dan 288.40 + 77.63 eggs, significantly different from the number of eggs in mating for 3 hours was 155.60 + 48.75 eggs. The egg hatchability was significantly influenced (p<0.01) by different time mating with means 92.16 + 6.57 %. Percentage of eggs hatchability with mating time of 6, 12 and 24 hours were not significantly different, but significantly different from the time of mating for 3 hours. The different time of mating did not significantly affected (p > 0.05) egg laying period (oviposition) with an average time was 5.00 ± 0.65 days. The result also showed that different time of mating was not significantly different (p> 0.05) to the time of hatching eggs with an average value of 9.80 ± 0.87 days. Moths are mated in different time of mating produced eggs that were not significantly different weighy (p> 0.05). The results at the second research showed that larvae of A. atlas liked both types of the given leaves. Interaction of treatment types of feed and the feeding frequency significantly affected (p<0.05) feed intake, digestibility, digested food, weight gain, diameter increament, mortality and instar period. Difference in feed and feeding frequency significantly affected (p<0.05) the average of larvae’s consumption from instar I to instar IV. Larvae fed with walnut leaf consumpt 0.310 g/larva (instar I) and 0.442 g/larva (instar II) higher that fed with guava leaves (0,279 g/larva; 0.392 g/larva). At the third and fourth instars, larvae fed with leaves of guava has the higher consumption average with 0.967± 0.098 g/larva and 1.211 ± 0.189 g/larva. Digestibility and digested feed were influenced significantly (p
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Judul: Peluang Partikel Plasma Berada Pada Dimensi Debye Akibat Gangguan Gelombang Elektromagnetik dengan Menggunakan Persamaan Schrödinger
Abstrak: The solution of Schrodinger equations with plasma Coulomb potential in spherical coordinat results solution wave function and energy plasma particle. Electron probability density at Debye length with thermal effect same as ion, which indicates plasma in neutral state. Electromagnetic waves perturbation of an electric field given to result wave function perturbation system. The probability density of plasma particle due to electromagnetic waves perturbation is the largest when an electromagnetic waves frequency 1.41 times the plasma frequency .
Keyword: Schrödinger, plasma, electromagnetic wave