SITI HERLINDA
Jurusan Hama dan Penyakit Tumbuhan, Fakultas Pertanian, Universitas Sriwijaya, Indralaya

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Perbandingan Keanekaragaman Spesies dan Kelimpahan Arthropoda Predator Penghuni Tanah di Sawah Lebak yang Diaplikasi dan Tanpa Aplikasi Insektisida SITI HERLINDA; WALUYO .; S. P. ESTUNINGSIH; CHANDRA IRSAN
Jurnal Entomologi Indonesia Vol 5, No 2 (2008)
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.272 KB) | DOI: 10.5994/jei,5,2,96

Abstract

Species Diversity and Abundance Comparison of the Soil-dwelling predatory-arthropods Inhabiting Fields Applied by Insecticide and without Insecticide Application. Studies on soil-dwelling predatory arthropods were carried out in lowland areas of South Sumatra, with objectives to analyze the species diversity and abundance of the predatoryarthropods inhabiting fields applied by synthetic insecticide, bioinsecticide, and without insecticide application. The predatory arthropods were sampled using pitfall traps. Indices of diversity and community similarities were applied to analyze the data. Results indicated that the arthropods inhabiting field without insecticide application had the highest diversity and abundance compared to other treatments. Predatory community similarities between those on the field without insecticide application and applied by bioinsecticide were higher compared to the fields applied by synthetic insecticide. KEY WORDS: diversity, abundance, predatory arthropod.
Keefektivan Beauveria bassiana (Bals.) Vuill. Isolat Indigenous Pagaralam Sumatera Selatan Pada Media Beras Terhadap Larva Plutella xylostella Linn. (Lepidoptera: Yponomeutidae) YULIA PUJIASTUTI; ERFANSYAH .; SITI HERLINDA
Jurnal Entomologi Indonesia Vol 3, No 1 (2006)
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (326.572 KB) | DOI: 10.5994/jei,3,1,30

Abstract

The objective of study was to investigate the effectiveness of Beauveria bassiana isolate cultured in half-ripe rice media against third-instar larvae of Plutella xylostella. The research used 10 isolates consisted of 4 isolates that were originnally collected from Pagaralam i.e. PD1 (isolated from P. xylostella cadaver), PD2, PD8, PD9B (from Crysodeixis chalcites cadaver), and 6 isolates from other areas as comparison, i.e. CCW3 (from Crysodeixis chalcites cadaver), BBL (from Hypothenemus hampei cadaver), CH (from Conomorpha cramerella cadaver), CPJW (from H. hampei cadavi), WC (from Nilaparvata lugens cadaver), and WSJT (from Leptocorixa acuta cadaver). The parameters that were measured were mortality of larvae, time of death and behaviour of larvae after application. Result of the test showed that B. bassiana isolated from L. acuta (WSJT isolate) caused the highest mortality i.e. 73.34 %, with the highest spore density 5.6x107 spore ml-1 (in half-rice media) and 3.0x107 spore ml-1 (GYA media). The lowest LT50 was 19.27 hours, and was obtained from the application of PD9B. After application of B. bassiana, the behaviour of larvae was slightly change from a healthy one to less in consuming of food and then die.KEY WORDS: Effectivity, Plutella xylostella, Beauveria bassiana, LT50