Mortality and feeding inhibition effects of several plant extracts collected from Merauke Distric, Papua against Crocidolomia pavonana (F.) larvae (Lepidoptera: Crambidae). The objective of this research was to study mortality and feeding inhibition effects of several plants extract species collected from Merauke District Papua as botanical insecticides against Crocidolomia pavonana larvae. Seven plants used in the research were Areca catechu seeds (Arecaceae), Eucalyptus pellita tree barks (Myrtaceae), Myrmecodia pendans tubers (Rubiaceae), Piper aduncum fruits (Piperaceae), Piper betle leaves (Piperaceae), Pandanus conoideus fruits (Pandanaceae), and Zingiber officinale rhizomes (Zingiberaceae). Each plant extract was tested to 2 nd instar C. pavonana larvae. The insecticidal activities were assessed including mortality and feeding inhibition activities. Extract concentrations for mortality tests using topical application method were 0,1%, 0,5%, 1%, 2%, and control, while extract concentrations for feeding inhibition tests using choice and no choice methods were 0,25%, 0,5%, 1%, 2%, and control. Each treatment was introduced to ten C. pavonana larvae and replicated five times. The results showed that P. aduncum and P. conoideus fruits extracts gave 100% mortality at 2% rate. Extract of P. betle leaf at 2% rate totally inhibited feeding activity of larvae (100%) using choice method, while extract of Z. officinale rhizome at 2% rate resulted in moderate feeding inhibition effect (75%) using no choice method.Key words: botanical insecticides, feeding inhibition, mortality, plant extracts ABSTRAK Efek mortalitas dan penghambatan makan beberapa ekstrak tumbuhan asal Kabupaten Merauke, Papua terhadap larva Crocidolomia pavonana (F.) (Lepidoptera: Crambidae).Tujuan penelitian ini adalah menguji pengaruh terhadap mortalitas dan penghambatan aktivitas makan dari beberapa ekstrak tumbuhan asal Kabupaten Merauke Papua sebagai insektisida nabati terhadap larva Crocidolomia pavonana. Tujuh spesies tumbuhan yang digunakan dalam penelitian adalah biji Areca catechu (Arecaceae), kulit kayu Eucalyptus pellita (Myrtaceae), umbi Myrmecodia pendans (Rubiaceae), buah Piper aduncum (Piperaceae), daun Piper betle (Piperaceae), buah Pandanus conoideus (Pandanaceae) dan rimpang Zingiber officinale (Zingiberaceae). Aktivitas insektisida yang diuji meliputi mortalitas dan penghambatan aktivitas makan. Ekstrak diuji pada empat taraf konsentrasi dan kontrol berdasarkan uji pendahuluan. Konsentrasi untuk pengujian mortalitas menggunakan metode perlakuan topikal adalah 0,1%, 0,5%, 1%, 2%, dan kontrol, sedangkan konsentrasi untuk pengujian penghambat makan adalah 0,25%, 0,5%, 1%, 2%, dan kontrol dengan metode pilihan dan tanpa pilihan. Sepuluh larva C. pavonana instar II digunakan untuk tiap perlakuan dan tiap perlakuan diulang sebanyak lima kali. Hasil penelitian menunjukkan ekstrak buah P. aduncum dan P. conoideus memberikan pengaruh mortalitas masing-masing 100% pada konsentrasi 2%. Ekstrak daun P. betle pada konsentrasi 2% mengha...