ABSTRACT

ABSTRAKPengembangan sumber energi terbarukan sebagai alternatif pengganti sumber energi fosil makin diperlukan. Salah satunya dengan menggunakan energi biomassa. Laban (Vitex pubescens) memiliki potensi yang cukup baik sebagai penyedia energi biomassa. Laban memiliki keunggulan nilai kalor yang tinggi dan pertunasan yang tinggi sehingga dapat menyediakan biomassa dalam waktu relatif cepat. Budidaya tanaman laban sering kali menjumpai masalah, diantaranya adalah serangan hama ulat pada fase semai. Penelitian ini bertujuan mengidentifikasi jenis hama, mengukur luas dan intensitas serangan hama yang menyerang semai laban di persemaian Kawasan Hutan Dengan Tujuan Khusus (KHDTK) Kemampo serta cara pengendaliannya. Berdasarkan hasil identifikasi diketahui, hama ulat yang menyerang semai laban di persemaian adalah jenis ulat Cnaphalocrocis medinalis. Jenis ini dikenal sebagai hama penting pada tanaman padi. Daun yang terserang menunjukkan gejala terlipat, berlubang-lubang seperti jaring dan menyisakan urat daun serta tulang daun. Hama ini dikenal dengan nama ulat pelipat daun. Daun yang terserang C. medinalis akan kehilangan mesofil daun sehingga akan mengganggu proses fotosintesis. Berdasarkan pengamatan pada saat serangan hama, hampir seluruh tanaman terserang hama (93,6%), intensitas serangan agak berat sampai dengan berat (2,09). Pengendalian hama dilakukan menggunakan insektisida berbahan aktif fipronil dapat menurunkan luas serangan sebesar 7,4% maupun intensitas serangan hama (1,45). Kata Kunci: Cnaphalocrocis medinalis, fipronil, ulat pelipat daun, Vitex pubescens ABSTRACTThe development of renewable energy sources as an alternative to fossil energy sources is increasingly necessary. One of them is biomass energy. Laban (Vitex pubescens) has good potential as a provider of biomass energy. Laban has the advantage of high calorific value and high budding so as to provide biomass in relatively short time. The cultivation of laban often encounters problems, such as pests attack at seedling phase. This study was aimed to identify the type of pest, to measure the extent and intensity of the attack as well as the control means in the laban nursery at Kemampo Forest areas for Special Purposes. The pests that attack laban seedlings in the nursery identified as Cnaphalocrocis medinalis. This pest is recognized as an important pest in rice. The affected leaves showed symptoms of folded, perforated like a net and leaved the leaf only with veins. This pest is wellknown as a leaf folder worm. The affected leaves lost its Smesophyll that would interfere with the photosynthesis process. The observations showed that almost all plants were damaged by the pest (93.6%). The intensity of the attack was categorized as heavy to severe (2.09). Pest control was done using insecticide with fipronil active ingredient that could reduce the extent by 7.4% and intensity of the pest attacks (1.45).