Judul: Efektivitas Polinasi Apis cerana Fabricus dan Trigona laeviceps Smith (Hymenoptera: Apidae) pada Fragaria x annanassa Kultivar Earlibrite
Abstrak: Strawberries (Fragaria x annanassa) is herbaceous perennial plant. Pollination of the plant is conducted by wind and insects, especially bees. The purpose of the research were to study pollination effectiveness of Apis cerana Fabricus and Trigona laeviceps Smith in Fragaria x annanassa Ealibrite Cultivar. Effectiveness of pollination of the bees were measured by visiting behavior and fruit set. Visiting behavior of bees were observed based on foraging rate, flower handling time, and total foraging time. Fruit set were measured based on number of normal fruit, number of abnormal fruit, size and weight of the fruits, and vitamin C content. Environmental factors, such as air temperature, humidity, velocity of wind, and light intensity were measured. Peak of foraging activity of A. cerana occurred in the morning, while T. laeviceps occurred in the noon. Foraging rate of A. cerana was 2.8 flowers/minutes, flower handling time was 12.64 seconds, and total foraging time was 14.46 minutes. Whereas, foraging rate of T. laeviceps was 3.23 flowers/minutes, flower handling time was 5.60 seconds, and total foraging time was 7.73 minutes. Pollination of A. cerana and T. laeviceps increase normal fruit, decrease abnormal fruit, increase size and weight of fruits, and vitamin C content.
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Judul: The Role of Tetragonula laeviceps (Apidae: Meliponinae) Pollination in Strawberry (Fragaria x ananassa) Crops and Their Potential Economic Value of Pollination
Abstrak: Tanaman stroberi merupakan jenis tanaman buah yang memiliki nilai ekonomi tinggi dan berpotensi dibudidayakan di Indonesia. Tingkat produktivitas tanaman stroberi sangat bergantung pada tingkat terbentuknya buah, salah satunya dipengaruhi oleh penyerbukan serangga penyerbuk seperti lebah tanpa sengat. Penelitian ini bertujuan menentukan peranan lebah Tetragonula laeviceps dalam penyerbukan tanaman stroberi dan menentukan nilai ekonomi penyerbukannya. Percobaan dilakukan di sebuah lahan tertutup menggunakan 4 perlakuan penyerbukan yang diulang sebanyak 6 kali. Perlakuan meliputi kontrol (K), penyerbukan dengan T. laeviceps (T), penyerbukan dengan T. laeviceps + aplikasi pestisida (TP), dan penyerbukan terbuka + T. laeviceps (T+). Peubah yang diamati meliputi aktivitas lebah, jumlah bunga dan buah terbentuk, bobot dan karakter buah, dan efisiensi polinasi. Nilai ekonomi dihitung dengan EVP (economic valuation of pollination services). Hasil penelitian menunjukkan bahwa peranan T. laeviceps dalam penyerbukan belum terlihat dapat meningkatkan produksi buah secara nyata namun masih dapat meningkatkan keuntungan usaha tani. Nilai ekonomi penyerbukan oleh T. laeviceps pada pertanaman stroberi sebesar Rp 11,69 juta/ha/tahun. Penggunaan pestisida sintetis dapat mengurangi aktivitas kunjungan T. laeviceps pada tanaman stroberi., The Strawberry crop is a type of fruit crop with a high economic value and is potentially cultivated in Indonesia. The level of productivity of strawberries is highly depend on the level of the fruit set, which is influenced by pollination by insect pollinators like stingless bees. This study was carried out to determine the role of T. laeviceps and their influence on the productivity of strawberry fruits and determine the economic value of pollination on the strawberries crop. The field experiments were carried out using 4 pollination treatments repeated 6 times. Treatment includes self-pollination (K), treatment with the assistance of T. laeviceps (T), treatment with the assistance of T. laeviceps and use of pesticides (TP), the treatment with the assistance of T. laeviceps with open pollination. The observed variables were bee activities, number of flowers and fruit set, fruit weight and the character, and pollination efficiency. The results showed the role of T. laeviceps in pollinated strawberry crops did not significantly increase production but can still increase farm profits. The economic value of pollination by T. laeviceps on strawberry crops was Rp 11.69 million/ha/year. The use of synthetic pesticides could reduce the activity of T. laeviceps visits on strawberry crops.
Keyword: bee activity, economic value of pollination, insect pollinator, stingless bee

Judul: Perencanaan Lanskap Jalan Western By Pass di Kotamadya Denpasar, Bali
Abstrak: Jalan Western By Pass dengan panjang keseluruhan .t 13 km merupakan salah satu jalan yang akan dibangun di wilayah Denpasar bagian barat, digunakan untuk menghubungkan daerah-daerah di sebelah utara (Tabanan, Kintamani, Sangeh, dll) dan selatan Denpasar (Kuta dan Nusa Dua). Jalan yang berfungsi sebagai jalan Arteri Primer ini bersama-sama dengan Northern dan Southern By Pass akan membentuk jaringan Outer Ring Road yang mengelilingi Kotamadya Denpasar dan direncanakan selesai serta mulai beroperasi secara optimal pada tahun 2002.
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