Penelitian Ini Bertujuan Untuk Mengetahui Keanekaragaman Jenis Serangga,Dan Peran Ekologi Serangga Sebelum Aplikasi Biopestisida Dan Setelah Aplikasi Biopestisida Di Kebun Pertanaman Pakcoy Fakultas Pertanian Universitas Borneo Tarakan. Penelitian Ini Merupakan Penelitian Eksploratif Yang Dilaksanakan Pada Bulan Mei Sampai Juni 2017. Pengambilan Sampel Dilakukan Dengan Menggunakan Perangkap Modifikasi Pitfall Trap, Sweep Net Dan Hand Conting, Identifikasi Dilakukan Di Laboratorium Perlindungan Tanaman Fakultas Pertanian Universitas Borneo Tarakan, Dengan Menggunakan Buku Determinasi Serangga Yang Diterbitkan Oleh Program Nasional Pelatihan Dan Pengembangan Pengendalian Hama Terpadu, Kanisus (1991), Borror Et Al (1992) Dan Web BugGuide.Net. Data Disajikan Dalam Bentuk Tabel Dan Diagram Serta Hasil Identifikasi Serangga Disajikan Dalam Bentuk Gambar. Keanekaragaman Jenis Serangga Dianalisis Dengan Menggunakan Indeks Shannon-Wiener Dan Peran Ekologi Ditentukan Berdasarkan Deskripsi Serangga. Hasil Penelitian Menunjukan Bahwa Diperoleh 4137 Individu Yang Terdiri Dari 6 Ordo, 21 Famili. Indeks Keanekaragaman (H’) Serangga Pada Kebun Pertanaman Pakcoy Sebelum Aplikasi Biopestisida (2,02) Dan Setelah Aplikasi (1,87) Yang Tergolong Dalam Kategori Sedang. Peran Ekologi Dari Serangga Pada Kebun Pertanaman Pakcoy Diperoleh Serangga Predator Sebanyak 9 Jenis Famili, Herbivora Sebanyak 8 Jenis Family, Parasitoid Sebanyak 2 Family, Perombak Bahan Organik Sebanyak 1 Family Dan Penyerbuk 1 Family.
Kata Kunci: Serangga, Pakcoy, Keanekaragaman, Peran Ekologi

This Study Aims To Determine The Diversity Of Insect Species Before The Application Of Biopesticides And After The Application Of Biopesticides Planted Pakcoy Mustard Plantings. This Research Is An Explorstive Resesrch Conducted In May Unril June 2017. Sampling Was Done By Using Pitfall Trap Modification Trap, Sweep Net And Hand Conting Identification Was Dont In Plant Protection Laboratory Of Faculity Of Agriculture University Borneo Tarakan, By Using Insect Determination Books Published By The National Program For Training And Integrated Pest Managemen Development, Kanisius (1991), Borror Et Al., (1992) And BugGuide.Net Web. Data Are Presented This Tabular From And Insect Identification Results Are Presented Ini The From Of Drawings. The Diversity Of Insect Species Was Analyzed Using The Shannon-Wiener Index And The Ecological Role Determined Based On The Description Of The Insect. The Results Showed That 4137 Individuals Were Otained From 6 Orders Of 21 Families. An Index Of Diversity (H’) Of Insects In Pakcoy Mustard Planting Plant Prior To Application Of Biopesticide (2.02) And After Aplication (1.87) Blonging To The Moderate Category. The Ecological Role Of Insects In The Planting Crop Of Pakcoy Is Obtainrd By Predator Insecies As Many As 9 Species Of Hervivorous Family As Man As 8 Family Types. Parasitoids As Much As 2 Familyes Organic Material Shake Asmuch As 1 Family And Pollinator 1 Family. Keywords: Insect, Pakcoy, Diversity, The Role Of Ecology