Judul: Biologi parasitoid telur Trichogramma sp. (Hym. : Trichogrammatidae) dan Telenomus sp. (Hym. : Scelionidae) pada penggerek padi kuning Scirpophaga incertulas (Walker) (Lep. : pyralidae)
Abstrak: Penggerek padi kuning merupakan salah satu hana utama tanaman padi. Ada tiga jenis parasitoid telur penggerek padi kuning di Indonesia yaitu: Trichogramma japonicum Ashm. (Hymenoptera: Trichogrammatidae), Telenomus rowani (Gahan) (Hymenoptera Scelionidae) dan Tetrastichus schoenobii Ferr. parasitoid telur Trichogramma sp. dan Telenomus sp. sangat penting untuk adalah diketahui. Aspek biologi yang diteliti : preferensi parasitoid pada berbagai umur telur penggerek padi kuning; siklus hidup parasitoid; kemampuan bertelur parasitoid pada telur yang sesuai; preferensi parasitoid pada berbagai kelompok telur,. serta superparasitisme dan parasitisme ganda. Juga dilakukan pengamatan lapangan untuk mengetahui komposisi parasitoid telur penggerek padi kuning di lapangan. ..dst
Keyword: Trichogramma, Telenomus, Hymenoptera

Judul: Dinamika Populasi Parasitoid Telur Penggerek Batang Padi Kuning Scirpophaga incertulas (Walker) (Lepidoptera: Pyralidae) pada Pertanaman Padi di Kabupaten Klaten
Abstrak: Yellow Rice Stem Borers (Scirpophaga incertulas) is an important pest of rice in Indonesia. Currently, most farmers depend on use of insecticides to control the pest and mostly by propalactic and indiscriminate ways. The practices can disrupt the environment and the activities of natural enemies. This study is to observe the dynamic off egg parasitoid of Yellow Rice stem Borers in three subdistrict (Juwiring, Cawas, and Trucuk) in Klaten, Central Java. Egg clusters were collected and reared to note parasitization every other weeks. This study during Februari-October 2012. The most dominant of egg parasitoid at Juwiring, Cawas, and Trucuk was Tetrastichus schoenobii with percentage 67%, 96%, and 43%. Egg parasitoids were found at Juwiring T. schoenobii, Telenomus rowani, Trichogramma japonicum and Telenomus sp., a hyperparasitoid also discovered at Juwiring is Trichomalopsis sp., at Cawas T. schoenobii and T. rowani were found, and at Trucuk T. schoenobii, T. rowani, and T. japonicum were found. Parasite of egg clusters at rice crops on 0-4 weeks after transplanting was T. schoenobii, and parasite of egg clusters at rice crops on 6 and 8 weeks after transplanting was T. rowani.
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Judul: Formulasi Surfaktan Metil Ester Sulfonat (MES) untuk Acid Stimulation Agent pada Lapangan Sandstone (Studi Kasus: Lapangan B)
Abstrak: Reservoir productivity normally declines with producing time or may be low initially. Acid stimulation is a method to increase the productivity of oil and gas wells. For sandstone field, hidrofluoride acid (HF) and some additives are ussually used as the solution for an acid stimulation agent. Methyl ester sulfonate (MES) can be used as one of the additives. MES for acid stimulation methods have a role to reduce the interfacial tension and modify wettability of the reservoir rock oil-wet to water-wet. The objective of this research is to obtain a formula with the best concentrations of MES or SMES that can reduce interfacial tension and combined with HF at various concentrations to enlarge rock pores. The best formula will be employed for futher testing in the laboratory. The performance tests included were thermal stability test, phase behavior and wettability. The best formula found for acid stimulation agent is surfactant MES 3% with addition of HF 9%. The results of performance test indicated that the thermal stability test at 80 0C can dissolves rocks up to 77.48% and have increased contact angle. For wettability test, the result obtained of the five treatments are that the contact angel increase significantly although more than 90 º. While the results of the phase behavior test was known that phase formed was in top phase or type II (+).
Keyword: methyl ester sulfonate, Acid stimulation agent