Fruit flies is one of the important pests which attack fruits in Indonesia and very detrimental economicaly. The objective of this research was to determine mating behaviour of fruit flies Bactrocera sp., testing their response to attractants methyl eugenol and cue lure as well as identification some species of fruit flies that attack belimbing, ketapang and paria fruits. The fruits samples which were affected by fruit flies were collected from plantation at Lopana and Kapitu, South Minahasa. Imago was assessed at laboratory of entomology, Faculty of Agriculture. Result showed that mating time of these species was occured between 17.10 -18.45. Sexual maturity of belimbing fruit flies was 10 -12 days. Whereas ketapang fruit flies and paria fruit flies were 10 -14 days and 11 -13 days respectively. B. dorsalis complex was attracted to methyl eugenol. While B. albistrigata and B. cucurbitaceae Coq.were attracted to cue lure. Keywords : fruit flies Bactrocera sp. Belimbing, ketapang, paria fruits, methyl eugenol and cue lure ABSTRAK Lalat buah merupakan salah satu hama penting yang menyerang buah-buahan di Indonesia dan sangat merugikan secara ekonomi. Sampel buah yang terserang lalat buah diambil dari desa Lopana dan Kapitu, Minahasa Selatan. Pemeliharaan imago dilakukan di laboratorium. Penelitian ini bertujuan untuk mengetahui beberapa aspek perilaku kawin lalat buah Bactrocera sp., menguji respon terhadap atraktan methyl eugenol dan cue lure serta mengidentifikasi jenis-jenis lalat buah yang menginfestasi buah belimbing, ketapang dan paria yang dipelihara pada kondisi laboratorium. Hasil penelitian menunjukkan waktu kawin lalat buah terjadi pada pukul 17.10 -18.45. Kematangan seksual lalat buah belimbing 10 -12 hari, lalat buah ketapang 10 -14 hari dan lalat buah paria 11-13 hari. Lalat buah B. dorsalis complex tertarik pada methyl eugenol sedangkan lalat buah B. albistrigata dan B.cucurbitaceae Coq. Tertarik pada cue lure. Kata kunci : lalat buah Bactrocera sp., buah belimbing, buah ketapang, buah paria, atraktan metil eugenol dan cue lure Eugenia Volume 17 No. 3 Desember 2011 PENDAHULUAN Buah-buahan dan sayuran merupakan sumber vitamin dan mineral alami yang utama. Buah-buahan, seperti jambu biji, belimbing dan pepaya mempunyai kandungan vitamin A dan C dalam jumlah besar. Sementara itu, sayuran sesuai jenisnya juga mempunyai kandungan vitamin dan mineral alami yang bernilai tinggi. Belimbing (Averrhoa carambola L) merupakan tanaman buah berupa pohon yang berasal dari Malaysia, kemudian menyebar luas ke berbagai negara beriklim tropis di seluruh dunia termasuk Indonesia. Pada umumnya belimbing ditanam dalam bentuk kultur pekarangan (home yard gardening), yaitu sebagai tanaman peneduh di halaman rumah. Di Indonesia terdapat cukup banyak ragam varietas belimbing diantaranya adalah; varietas Sembiring, Siwalan, Dewi, Demak, Demak Kapur, Demak Kunir, Demak Jingga, Pasar Minggu, Wijaya, Paris, Filipina, Taiwan, Bangkok dan varietas Malaysia. Tahun 1987 telah dilepas dua varietas belimbing unggul nasional yaitu; vari...

The research aimed to identify important pests which attack sweet potato in the field. Field and laboratory research were conducted. The field research was carried out in sweet potato cropping areas in Minahasa Regency, North Minahasa regency and Tomohon. The laboratory research was conducted in plant pests and disease laboratory, Faculty of Agriculture Sam Ratulangi University Manado to idedntify the important pest species which were found on sweet potato plants. The duration of the study was four months starting from December 2010 until March 2011. Survey method was applied with purposive random sampling. The research was used 4 period of plant growth namely 1 month, 2 months,3 months, and 4-5 months after planting. The result showed that there were five orders identified, attacking sweet potato since the age of 1-4 months in Minahasa regency, Tomohon and North Minahasa regency. The five orders were Orthoptera, Hemiptera, Homoptera, Lepidoptera, and Coleoptera. The damage on the leaves were caused by pests coreidae, Cicadelidae, Spodoptera sp (Noctuidae), Valanga sp (Acrididae), and Oxya sp. (Acrididae), whereas on the stem was Omphisa sp (Pyralidae). Damage on the tuber was caused by Gryllotalpa sp (Gryllotalpidae), Cylas formicarius (Curculionidae) and Oryctes sp (Dynastidae).

Research was aiming to determine the effectiveness of the attractant methyl eugenol + traps modification in the catch of species of fruit flies in the chilli plants at any given time and to identify the types of fruit flies trapped with methyl eugenol + traps modification on chilli crop acreage. The field research was conducted in the area of chilli crop in three places namely District Pineleng, Tompaso / Langowan and Modoinding. Observation number and type of fruit flies was performed at intervals of 2 weeks of observation for 3 months. The result showed that the number of fruit fly caught or trapped dead at 30 traps set in chilli crop acreage was 1278. The highest trapped was 164 whereas the lowest trapped was 89. The number of male fruit flies trapped was high implying that reduction of male fruit fly population in the field. There were five types of fruit flies identified from area of Pineleng, Tompaso and Modoinding namely Bactrocera umbrosa Fabricus, Bactrocera dorsalis (Hendel), Bactrocera philippinensis, Bactrocera carambolae, and Bactrocera sp. The five types were attracted to methyl eugenol. ABSTRAKPenelitian ini bertujuan adalah untuk 1) mengetahui efektifitas atraktan methyl eugenol + perangkap modifikasi dalam menangkap spesies lalat buah di areal tanaman cabe pada rentang waktu tertentu dan 2) mengidentifikasi jenis-jenis lalat buah yang terperangkap dengan perangkap modifikasi + methyl eugenol pada areal tanaman cabe. Penelitian dilaksanakan di lapang tepatnya di areal pertanaman cabe di tiga kecamatan yaitu : 1) Pineleng, 2) Tompaso/Langowan dan 3) Modoinding. Hasil penelitian menunjukkan bahwa jumlah lalat buah yang tertangkap atau terperangkap mati pada 30 perangkap yang dipasang di areal pertanaman cabe berjumlah total 1278 ekor dengan kisaran jumlah tangkapan perperangkap terendah 89 ekor dan tertinggi 164 ekor. Hasil penelitian adalah cukup baik untuk diterapkan sebab jumlah tangkapan terhadap lalat buah jantan cukup tinggi. Hal tersebut dapat menyebabkan penekanan atau penurunan terhadap populasi lalat buah jantan di lapang yang secara signifikan akan memberi pengaruh negative terhadap regenerasi populasi lalat buah berikut. Dari seluruh sampel lalat buah yang tertangkap pada areal tanaman cabe di pineleng, tompaso dan modoinding kemudian disortir dan diidentifikasi terdapat 5 jenis lalat buah yang tertarik pada methyl eugenol yaitu: Bactrocera umbrosa Fabricus, Bactrocera dorsalis (Hendel), Bactrocera philippinensis, Bactrocera carambolae, dan Bactrocera sp. (male annihilation technique), Bactrocera umbrosa Fabricus, B. dorsalis (Hendel), B. philippinensis, B. carambolae Eugenia Volume 17 No. 2 Agustus 2011 Kata kunci : MAT

The many types of fruit flies and the presence of vague traits between species cause identification and characteristics of these insects often encounter difficulties.  The problem of how the morphological character of the fruit fly Bactrocera spp. can be determined to the species level precisely and accurately. The purpose of this research is to study and identify the types of fruit flies Bactrocera spp. based on morphological characters. The identification stage is carried out by determining the morphological characteristics of the head, thorax, wings and abdomen for each species of Bactrocera spp. The results of identification of several species of fruit flies Bactrocera to the level of species based on morphological characteristics of adult insects found five species of Bactrocera are Bactrocera umbrosa (Fabricius), Bactrocera albistrigata (de Meijere), Bactrocera carambolae (Drew and Hancock), Bactrocera dorsalis (Hendel), and Bactrocera tau (Walker).