Efektifitas Tanaman Serai (Andropogan Nardus L.) sebagai Tanaman Penolak Liriomyza Sp.(diptera : Agromizidae) pada Pertanaman Bawang Merah Lembah Pal

The research objective was to determine the effectiveness of the lemongrass plant (Andropogannardus L.) as a repellent pest plant against Liriomyza sp. At shallot cropping in Palu Valley. This study used a randomized block design within which treatments included planting lemongrass plant (PLP) at four weeks (PLP 4), two weeks before (PLP 2) and at the same time (PLP 0) of the shallot crop was planted, as well as control (with no lemongrass planting). Variables observed were the populations of adult Liriomyza sp. and the attack rate of Liriomyza sp. as well as the crop production. The results showed that five and six weeks after the shallots were planted, the population of adult and the attack rate of Liriomyza sp. were lower in the PLP 4 than in the PLP 2, PLP 0 and control treatments. The treatment plant as a crop repellent lemongrass does not affect the production of onion valley hammer.Attack rate, repellent plants, Liriomyza sp. imag

Adopsi Petani terhadap Pelaksanaan Konsep Pengendalian Hama Terpadu Tanaman Bawang Merah (Allium Cepa Var. Aggregatum L.) di Desa Solove Kabupaten Sigi

This study aimed to assess the differences in the level of farmers\u27 adoption of Integrated Pest Management component between farmers Alumni Field School Integrated Pest Management (SLPHT) and the farmers who have\u27nt followed the SLPHT onion crop. The research method used in the form of a random survey by interviewing respondents directly to the with to the question that has been presented in the questionnaire. Sample of respondents farmers by 40 people consisting of 20 farmers SLPHT and 20 farmer non-SLPHT. The results showed that the rate of adoption of SLPHT farmers are higher than non-SLPHT farmers with an average value is 14,30 (SLPHT) to 10,25 (Non SLPHT) and there is a significant relationship pbetween the factors that influence the rate of adoption by farmers\u27 adoption SLPHT of the components of IPM relative gain factor (6.73), compatibility (6.99), complexity (10, 65), triabilitas ( 15.38), observability (14.17) and the decision of innovation (9.37)

Pengorok Daun Dan Potensi Parasitoidnya Pada Berbagai Jenis Tanaman Sayuran Di Lembah Palu, Sulawesi Tengah

Leafminers and potency of their parasitoids at vegetable crops in Palu Valley, Central Sulawesi. Leafminer is an exotic pest and becomes a new important pest species of onion and other vegetable crops in Central Sulawesi. The study aimed to survey the leafminer species and its infestation level at several vegetable crops as well as the potency of their parasitoids as biocontrol agents. Therefore, several crops (onions, tomato, cabbage, string bean, lemon basil, amaranth) were observed toidentify the leafminer species and their associated parasitoids. Several leaves of all crops infested by leafminers were collected for rearing the leafminers and their parasitoids in laboratory. The study recorded three species of leafminers:Liriomyza chinensis, L. sativae, and L. huidobrensis and five species of parasitoids: Hemiptarsenus varicornis, Chrysocharis pentheus, Sympiesis sp., Gronotoma micromorpha, and Opius sp. While Liriomyza chinensis was only recorded from onion crops (monophagus), other species were poliphagus. An average infestation level among leafminer species varied, i.e. 21% -51% while parasitism ranged were 13%-40 %. The most abundant parasitoid recorded from all observed crops was H. varicornis.The results suggest that parasitoids, mainly H. varicornis have a high potential to control leafminers in the vegetable crops in Palu Valley

Pengaruh Aplikasi Insektisida Berbahan Aktif Dimehipo Terhadap Liriomyza Chinensis Kato (Diptera: Agromyzidae) Dan Parasitoidnya Pada Tanaman Bawang Merah (Allium Ascalonicum L.)

Penelitian ini bertujuan untuk mengetahui pengaruh aplikasi insektisida dimehipo terhadap intensitas serangan L. chinensis (Diptera: Agromyzidae) dan parasitoidnya pada tanaman bawang merah (A. ascalonicum). Penelitian ini dilaksanakan pada bulan Mei sampai Juli 2013 di Desa Trans Sidera yang terletak 176 m di atas permukaan laut dan di Laboratorium Hama dan penyakit Fakultas Pertanian. Menggunakan metode eksperimental dengan dua perlakuan (aplikasi insektisida vs tanpa aplikasi insektisida) dengan masing-masing enam ulangan. Hasil penelitian menunjukkan bahwa rata-rata intensitas serangan L. chinensis pada lahan aplikasi insektisida (1,33%) lebih rendah dan berbeda nyata dengan rata-rata intensitas serangan pada lahan tanpa aplikasi insektisida (50,86%). Terdapat dua spesies parasitoid yang ditemukan pada lahan tanpa aplikasi insektisida yang berasosiasi dengan L.chinensis yakni Hemiptarsenus varicornis dan Simpiesis sp. dengan tingkat parasitisasi berkisar 20% sampai 40% sementara pada lahan aplikasi insektisida tidak terdapat parasitoid yang ditemukan

Efektifitas Insektisida Nabati Laseki dan Perangkap Likat dalam Pengendalian Hama Pengorok Daun, Liriomyza Chinensis (Diptera: Agromyzidae) pada Tanaman Bawang Merah Lokal Palu

Onion (Allium ascalonicum L.) is one of the commodities that potential especially in the city of Palu. However, in cultivation, red onions have a lot of problems especially L.chinensis pests. The purpose of this study was to determine the effectiveness of using yellow sticky traps and pesticides in controlling plant LASEKI L.chinensis the crop shallot Local Palu. This study uses a randomized block design tersiri of 2 factors and repeated 4 times. The first factor is the concentration of insecticide LASEKI plant consisting of 3 levels ie: L0 = no LASEKI vegetable insecticides, L1 = 5%, L2 = 10%. The second factor is the use of traps consisting of 2 levels ie P1 = use yellow sticky traps, P2 = The use of transparent sticky traps. Based on those two factors, the obtained 6 treatment combinations with 4 times as many replications. Each treatment there were 10 clumps, so there are 240 family units experiment. The results showed that there was no interaction between treatment sticky traps (P) with botanical pesticides LASEKI the number and amount of imago L.chinensis were caught on sticky traps. Treatment with vegetable insecticide concentration LASEKI 5% (L1) and 10% (L2) is effective in suppressing the number korokan L. chinensis and also effectively increases the production of onion crop. The use of yellow sticky traps (P1) effectively reduces the number of L. chinensis who snore leeks

Kajian Jenis Pengorok Daun (Liriomyza SP.) (Diptera: Agromizydae) pada Berbagai Tanaman Inang di Lembah Palu

Hama pengorok daun merupakan hama pendatang dari benua Amerika Latin yang masuk ke Indonesia sekitar tahun 90 an dan dilaporkan keberadaannya di Palu, Sulawesi Tengah sekitar tahun 2005. Hama ini memiliki banyak tanaman inang atau bersifat polifagus. Tujuan penelitian adalah untuk mengetahui jenis-jenis pengorok daun pada berbagai tanaman inang di Lembah Palu. Penelitian di laksanakan di Kelurahan Boyaoge, Kelurahan Pengawu (Kecamatan Palu Barat) dan Desa Langaleso (Kecamatan Dolo) dan di Laboratorium Hama dan penyakit tumbuhan Fakultas Pertanian Universitas Tadulako yang berlangsung pada bulan Juli sampai Oktober tahun 2012. Karakter morfologi yang diamati adalah warna scutellum, pola warna tergit pada abdomen dan warna tungkai. Selain itu, diamati juga ciri serangan Liriomyza pada tanaman inangnya. Berdasarkan hasil identifikasi yang telah di lakukan di Laboratorium didapatkan 5 (lima) spesies lalat penggorok daun, yakni Liriomyza brassicae pada tanaman Sawi; Tomat dan Kembang kol, Liriomyza bryonae pada tanaman Sawi, Liriomyza chinensis pada tanaman Bayam, Liriomyza huidobrensis pada tanaman Kacang Panjang dan Liriomyza sativae pada tanaman Tomat dan Kemangi. Kelima spesies Liriomyza tersebut selain berbeda secara morfologi juga menunjukkan ciri serangan yang berbeda pada tanaman inangnya

Effectiveness of Dung Beetles as Bioindicators of Environmental Changes in Land-use Gradient in Sulawesi, Indonesia

Bioindicators have been widely accepted as useful tools for monitoring and detecting changes in the environment or habitat condition. By using bioindicators, it is possible to assess the impact of human activities on the biota, instead of examining the entire biota. In this paper we analyzed diversity of dung beetles (Coleoptera: Scarabaeidae) across land use gradient inCentral Sulawesi and tested the suitability of dung beetles as bioindicators for environmental changes. Ninety baited pitfall trapswere placed and several habitat parameterswere measured at five land-use types ranging from natural forest to cacao agroforestry systems to open areas in 2009 and 2012. The effectiveness of dung beetles as bioindicators of environmental changes was evaluated by the IndVal method, a method combining the specificity and fidelity of certain species with particular types of habitat or environmental conditions. Surprisingly, the results showed that the diversity of dung beetles in two types of cacao plantations were similar to the forest sites and were significantly higher than the open cultivated area. Of the 16 dung beetles species analyzed only four species could be suggested as indicator (characteristic) species while the majority of collected species were categorized as detector species. Two of them (Copris saundersi and Onthophagus forsteni) were associated with natural forest and cacao agroforestry system, thus were suggested as the indicator of shaded and cooler habitats whereas O. limbatus and O. trituber can be suggested as indicator of unshaded and warmer habitats (bare land area)