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All Journal Jurnal Matematika & Sains Biocelebes
Tjandra Anggraeni
Departemen Biologi-ITB
Agriculture, Biological Sciences & Forestry Mathematics

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Konsumsi Makan dan Pertumbuhan Larva Helicoverpa armigera Toleran terhadap Pemaparan Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV) Yayan Sanjaya; Wardono Noloperbowo; Tjandra Anggraeni
Jurnal Matematika & Sains Vol 9, No 4 (2004)
Publisher : Institut Teknologi Bandung

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An investigation on the effect of repeated infection of Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV) to Helicoverpa armigera to know its effect on Helicoverpa armigera tolerance had been carried out. On treatment with 800 (Polyhedral Inclusion Body/dose) PIB/dose indicated that the exposure of HaNPV to H. armigera larva showed no difference significantly (P> 0.05) on its LD50 to every generation exposed. In contrast, H. armigera which had been exposed by HaNPV had a higher food consumption and larval growth rate compared to H. armigera without treatment. This investigation also showed that the increasing food consumption and larvae growth rate of H. armigera was in line with the increase of HaNPV exposure. Infection of HaNPV caused a development of tolerance mechanism in H. armigera.
Perilaku dan Penentuan Oviposisi dari Parasitoid Telur Hadronotus leptocorisae (Hymenoptera) pada Telur Hama Bulir Padi Leptocorisa acuta (Hemiptera) Tjandra Anggraeni; Aisah Jamili; Umrah Umrah
Biocelebes Vol. 4 No. 2 (2010)
Publisher : Biology Department, Mathematics and natural science, Tadulako University

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The research of behavior and host determination for the oviposition of egg parasitoid of Hadronotus leptocorisae on egg of the rice seed pests (Leptocorisa acuta) was carried out. H. leptocorisae collected from rice field were inserted into the tube containing of eggs of L. acuta which were divided into three group based on their ages; young eggs (0-1 days); mature eggs (2-3 days) and old eggs (4-5 days). The results showed that female H. leptocorisae prefer to oviposition on young eggs. Descriptive observation indicated that before eggs were laid, female H. leptocorisae inspect L. acuta eggs by rubbing of L. acuta eggs with its antenna and ovipositor. Furthermore, oviposition of H. leptocorisae eggs was begun by holing of L. acuta eggs and was followed by putting its eggs by its ovipositor. That behavior is its strategies to survive. The results of this study can contribute to answer pest L. acuta problems which are often found in rice fields. By the appropriate monitoring of L. acuta eggs in rice field, the disposal time of H. leptocorisae could be done effectively and efficiently.Key words: Hadronous leptocorisae; Leptocorisa acuta; egg parasitoid.
Co-Authors Aisah Jamili Umrah Umrah Wardono Noloperbowo YAYAN SANJAYA