*Penulis korespondensi: Inrianti Sari Handayani. Program Studi Entomologi, Departemen Proteksi Tanaman, Fakultas Pertanian, Institut Pertanian Bogor. Jalan Kamper, Kampus IPB Dramaga, Bogor 16680, Email: indriantisari@yahoo.com November 2019, Vol. 16 No. 3, 163–170 Online version: http://jurnal.pei-pusat.org DOI: 10.5994/jei.16.3.163 Jurnal Entomologi Indonesia Indonesian Journal of Entomology ISSN: 1829-7722 163 Perbedaan pola tanam dan kriteria aplikasi insektisida memengaruhi keanekaragaman arthropoda tanah pada pertanaman kubis (Brassica oleracea) Diferent cultivation patterns and insecticide application criteria afect soil arthropod diversity on cabbage cultivation (Brassica oleracea) Inrianti Sari Handayani 1 * , Dadang 2 , Ali Nurmansyah 3 1 Program Studi Entomologi, Departemen Proteksi Tanaman, Fakultas Pertanian, Institut Pertanian Bogor, Jalan Kamper, Kampus IPB Dramaga, Bogor 16680 2 Departemen Proteksi Tanaman, Fakultas Pertanian, Institut Pertanian Bogor Jalan Kamper, Kampus IPB Dramaga, Bogor 16680 (diterima Juli 2018, disetujui September 2019) ABSTRAK Penggunaan pestisida secara berlebihan dan intensif pada tanaman kubis (Brassica oleracea) dapat menyebabkan resistensi, resurgensi, pencemaran lingkungan, residu kimia, dan penurunan populasi musuh alami dan keanekaragaman arthropoda tanah. Berbagai teknik pengendalian hama telah dikembangkan, seperti penggunaan sistem tumpang sari yang merupakan bagian dari teknik budi daya dan juga aplikasi insektisida. Tujuan penelitian ini untuk memelajari efek dari tiga pola tanam kubis dan perbedaan kriteria aplikasi insektisida terhadap keanekaragaman arthropoda tanah. Percobaan disusun berdasarkan rancangan petak terbagi. Tiga pola tanam kubis terdiri atas tumpang sari kubis dan tomat, kubis dan Ageratum sp. sebagai tanaman refugia, dan kubis monokultur. Tiga kriteria dalam aplikasi insektisida, yaitu didasarkan pada ambang ekonomi, aplikasi berjadwal, dan tanpa aplikasi insektisida. Secara umum, pola tanam kubis monokultur dan aplikasi pestisida menyebabkan kelimpahan arthropoda tanah lebih rendah dibandingkan dengan perlakuan lainnya. Perlakuan kubis dengan Ageratum sp. dan tanpa aplikasi insektisida dapat meningkatkan keanekaragaman arthropoda tanah. Kata kunci: Ageratum sp., refugia, tomat, tumpang sari ABSTRACT The use of intensive and excessive insecticides on cabbage cultivations causes pest resistance, pest resurgence, environmental pollution, chemical residues, as well as decreasing the population of natural enemies and soil arthropods. Various pest control techniques have been developed to reduce pest population, two of them are intercropping system as part of cultural technique strategy and insecticide application. The aim of this research was to study the efect of three cabbage (Brassica oleracea) cultivation patterns and diferent criteria in insecticide application against soil arthropod diversity including natural enemy population. The research was designed using split plot experimental design. The three cultivation patterns consisted of intercropping cabbage with tomato, cabbage and Ageratum sp. as refugia plant, and monoculture cabbage. Three criteria in insecticide application were economic threshold-based application, calendar system, and without insecticide application. In general the results showed that cabbage monoculture cultivation and insecticide application resulted in lowest soil arthropod population among other treatments. Treatments of cabbage and Ageratum sp. and without insecticide application could increase the diversity of soil arthropods. Key words: Ageratum sp., intercropping, refugia, tomato