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Abstrak (Bhs. Indonesia)

Penelitian bertujuan untuk mendapatkan spesies jamur entomopatogen dan mengetahui potensinya sebagai agens pengendali hayati hama Nilaparvata lugens Stal, serta mengetahui konsentrasi jamur entomopatogen yang efektif  mengendalikan hama N. lugens. Penelitian dilaksanakan dari bulan April sampai bulan November 2012 di Laboratorium Perlindungan Tanaman dan rumah plastik Fakultas Pertanian, Universitas Jenderal Soedirman, Purwokerto. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) non-faktorial dengan 6 perlakuan dan 4 kali ulangan. Perlakuan yang dicoba, meliputi: pemberian air steril/kontrol, pemberian F. cf. solani 7,80 x 105; 1,05 x 106; 6,80 x 107; 1,99 x 108 dan 3,55 x 109 spora/ml. Variabel yang diamati adalah mortalitas N. lugens (%), waktu kematian N. lugens, perubahan kenampakan serangga  N. lugens terinfeksi dan kepadatan spora per ekor serangga N. lugens terinfeksi. Hasil penelitian menunjukkan bahwa spesies jamur entomopatogen yang berhasil didapatkan dari N. lugens yang mati pada pertanaman padi dan berpotensi sebagai agens pengendali hayati hama N. lugens adalah Fusarium cf. solani. Jamur F. cf. solani konsentrasi 105-109 spora/ml belum efektif mematikan N. lugens, mampu menekan N. lugens berkisar 25-41,25%, dengan LC50 sebesar 3,48 x 1011 spora/ml, nilai LT50 pada konsentrasi 109 spora/ml yaitu 4,2 hari.

Abtrak (Bhs. Inggris)

This research purposed to get entomopathogenic fungi and know the potention as biological control Nilaparvata lugens Stal, and to know the effective concentration of entomopathogenic fungi to control of N. lugens pest. The experiment was conducted in April to November 2012 at Laboratory of Plant Protection and green house, Agriculture Faculty, Jenderal Sudirman University, Purwokerto. Non-factorial Randomized Block Design (RBD) was used with six treatment and four replicates.The treatments tested were addition of sterile water/control, addition of F. cf. solani at concentrations 7.80x105; 1.05x106; 6.80x107; 1.99x108 and 3.55x109spores/ml. Observed variables were mortality N. lugens (%), time of N. lugens death, appearance changes of the infected N. lugens pests and spore density of each infected N. lugens pests. Result of the research showed that entomopathogenic fungi species were successfully obtained from infected N. lugens on rice cultivation and have potential as biocontrol agents is Fusarium cf. solani. Concentration of F. cf. solani was 105-109 spores/ml has not been effectively to kill N. lugens, suppressed N. lugens between 25-41.25%, LC50 is 3.48 x 1011 spores/ml, LT50 value at concentration 109 spores/ml is 4.2 days.

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