Judul: Visiting Frequency of Weevil Pollinator Elaeidobius kamerunicus Faust. on Oil Palm’s Female Flowers in PTPN VII Cikasungka, Bogor., Atmowidi,Tri, Kurniawan,Yana
Abstrak: Elaeidobius kamerunicus adalah kumbang polinator efektif pada tanaman kelapa sawit. Keberadaan kumbang penyerbuk kelapa sawit di perkebunan sangat diperlukan dalam meningkatkan pembentukan buah untuk menjamin kelangsungan penyerbukan pada kelapa sawit, diperlukan kumbang dengan jumlah optimum. Frekuensi kunjungan kumbang E. kamerunicus menentukan penyerbukan pada kelapa sawit. Penelitian ini bertujuan mempelajari frekuensi kunjungan kumbang E. kamerunicus pada bunga betina tanaman kelapa sawit umur tujuh tahun. Pengamatan frekuensi kunjungan kumbang dilakukan dengan fix method selama 10 menit, dengan menggunakan blok waktu, yaitu pagi (09.00-10.00), siang (13.00-14.00), dan sore (16.00-17.00). Parameter lingkungan juga di ukur selama pengamatan kumbang. Frekuensi kunjungan kumbang ke bunga betina tertinggi (121 kumbang/10 menit) terjadi pada pagi hari. Kunjungan pada siang hari (23 kumbang/10 menit) dan sore hari (17 kumbang/10 menit) lebih rendah dibandingkan pagi hari. Frekuensi kunjungan kumbang berkaitan secara signifikan dengan suhu dan kecepatan angin
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Judul: Frekuensi Kunjungan Elaeidobius kamerunicus Faust. pada Bunga Betina dan Efektivitasnya terhadap Pembentukan Buah Kelapa Sawit
Abstrak: Elaeidobius kamerunicus (Coleoptera: Curculionidae) is the most effective pollinator of oil palm. This research aimed to study visiting frequency of E. kamerunicus on female flowers and its effectiveness to oil palm’s fruit set. Fix sample method was used to observe visiting frequency of E. kamerunicus. Observations were conducted in 10 minutes in the morning (09:00-10:00 am), afternoon (13:00-14:00 pm), and evening (16:00-17:00 pm). The environmental parameters were measured to know its effect to visiting frequency the weevil. The weevil mostly visited the flower in the morning (109 weevils/10 minutes), decreased at afternoon (26 weevils/10 minutes), and in the evening (13 weevils/10 minutes). The average visiting frequency of weevil to the female flowers was 50 individuals/10 minutes. Pollen load of the male weevil was 1440 pollen, while the female loaded about 635 pollen. The pollen viability on male and female body of the weevil were 8.65% and 7.90%, respectively. The average of oil palm’s fruit set in Sukamaju Plantation was 77.87%. The visiting frequency of weevil to the female flowers was positively related to the oil palm’s fruit set.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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