Judul: Perilaku Kawin Kumbang Cylas formicarius (Fabr.) terhadap Feromon Seks Sintetik pada Tanaman Ubi Jalar
Abstrak: Cylas formicarius (Fabr.) is weevil that infest sweet potato. Female C. formicarius release sex pheromone to attracted the male for mating. Synthetic pheromone of female C. formicarius is determined as (Z)-3-dodecen-1-ol(E)-2-butenoat. This research were aimed to explore several aspects of male C. formicarius behaviour such as (1) attraction to several concentrations of synthetic pheromone (2) flight response to pheromone trap in several height trap position and, (3) time response within 24 hours to sex pheromone trap. This research was conducted from Januari-Mei 2013. Behavioural test of male C. formicarius were carried out using pheromone water trap method and observation mating behaviour of C. formicarius were recorded using handycam. The highest number of weevil collected was trap by 250-1000 μg/rubber septa. The optimum of flight response was at 25-50 cm from ground level. The peak of C. formicarius to response synthetic pheromone between 18.00–20.00 and mating activity of C. formicarius observed at 18.29. This mating behaviour information can be used to control its population.
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Judul: Perilaku Kawin dan Fekunditas Ngengat Sutera Samia cynthia ricini (Biosduval) (Lepidoptera: Saturniidae)
Abstrak: Samia cynthia ricini (Lepidoptera: Saturniidae) merupakan serangga penghasil sutera komersial, selain ulat sutera domestik Bombyx mori. Perkawinan dan fekunditas merupakan faktor penting yang mempengaruhi kelangsungan hidup, rasio seks, genetika populasi, dan produktivitas ngengat sutera. Tujuan penelitian ini adalah mendeskripsikan perilaku kawin dan mengukur fekunditas ngengat sutera S. cynthia ricini. Dalam penelitian ini diukur bagian tubuh, diamati tahap dan durasi aktivitas perilaku kawin, dan fekunditas ngengat sutera S. cynthia ricini. Hasil pengamatan menunjukkan dimorfisme seksual pada ngengat S. cynthia ricini yaitu imago betina lebih besar ukurannya dibandingkan jantan. Urutan dan durasi dalam perilaku kawin ngengat S. cynthia ricini, meliputi calling (5.00 menit), courtship (2.12 menit), kopulasi (915.62 menit), dan post-kopulasi (oviposisi) (9.12 menit). Peletakkan telur ngengat S. cynthia ricini terjadi selama 4 hari dan oviposisi terbanyak terjadi pada hari pertama. Presentase keberhasilan penetasan telur sebesar 97.81%-99.20%., Samia cynthia ricini (Lepidoptera: Saturniidae) is a commercial silk producing insect other than the domestic Bombyx mori silkworm. Mating and fecundity are important factors influencing survival, sex ratio, population genetics, and silk moth productivity. The purpose of this study were to describe mating behavior and to measure the fecundity of the silk moth S. cynthia ricini. In this study were measured body parts, the stages and activity duration of the mating behavior and the fecundity of S. cynthia ricini. The results showed that the sexual dimorphism was found in S. cynthia ricini that the female body size was bigger than the male. The sequence and duration of S. cynthia ricini mating behavior included calling (5.00 minutes), courtship (2.12 minutes), copulation (915.62 minutes), and postcopulation (oviposition) (9.12 minutes). Oviposition of S. cynthia ricini occurred for 4 days and most oviposition occurred on the first day. The percentage of successfull egg hatching was 97.81% -99.20%.
Keyword: Fecundity, mating, Samia cynthia ricini, silkworms

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular