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Armen Lusi
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Agriculture, Biological Sciences & Forestry Education

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PENGARUH EKSTRAK KULIT BATANG ANGSANA (Pterocarpus indicus Willd.) TERHADAP KONSUMSI PAKAN WALANG SANGIT (Leptocorisa oratorius Fabricius) Suarna, Mailastri; Sumarmin, Ramadhan; Lusi, Armen
Pendidikan Biologi Vol 2, No 2 (2013): Jurnal Mahasiswa Pendidikan Biologi Genap 2013-2014
Publisher : STKIP PGRI Sumbar

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ABSTRACTWalang rice pest is a pest that attack rice plants after flowering by sucking liquidgrain and causes the grain to be empty or incomplete filling. This pest can reduce not only the results but also degrade the quality of grain such as brown spots on the grain. Angsana bark extract expected to be antifeedant to walang rice pest .The aim of this to determine the effect of angsana bark extract on feed intake Angsana walang rice pest .This research used Completely Randomized Design ( CRD ) with 4 treatments and 8 replications . Angsana bark extract treatment given is 0 % , 2.5 % , 5 % and 7.5 % . Data were analyzed using ANOVA test and if followed by LSD test . The research was conducted in April-June in the Laboratory of Zoology Department of Biology Faculty padang state university.The results showed that in the control treatment searching activity walang rice pest of takes the fastest31 minutes 62 seconds compared to other treatments . For grounding activity found in the fastest the control 19 minutes 34 seconds while on treatment with a gathering activity concentration of 5 % takes a quickes 11 minutes 8 seconds . On feed consumption Angsana bark extract in the treatment and control concentrations of 5  % indicates the average number of the lowest feed intake of 0.53 % . It can be concluded that the influence of Angsana bark extract at a concentration of 5 % can be used as an antifeedantto walang rice pest .  
KOMPOSISI DAN STRUKTUR GASTROPODA DI SUNGAI KUANTAN DESA LUBUK TERENTANG KECAMATAN GUNUNG TOAR KABUPATEN KUANTAN SINGINGI, RIAU Utami, Heffy; Nurdin, Jabang; Lusi, Armen
Pendidikan Biologi Vol 2, No 2 (2013): Jurnal Mahasiswa Pendidikan Biologi Genap 2013-2014
Publisher : STKIP PGRI Sumbar

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ABSTRACT            The Gastropod is macroorganism in the water. It is important for live organism in the water, it is as primary consumer. The research purpose to know the composition and structure of the Gastropod in the Kuantan river. The research was carried out in may of  2013 with a descriptive survey method in purposive random sampling with a set of field conditions based on station. This method is used because there are MCK, gold minning, rubber plantation. A total of  Gastropod species found are 14 species belong 9 genera, 4 families  and 1 ordo. Thiaridae  found as the families with the highest of species (7 species),  followed by Pleuroceridae (5 species), Pachychilidae and Cochlipidae  found 1 species. Melanoides anomala  found as dominant species (18,34%).  The highest of totally density showed in the station II (22,37 individu/m2) and the lowest density showed in the station III (16,00 individu/m2). Indeks diversity of  Gastropod in the Kuantan river turn 1,39-2,14, So the Kuantan river into medium pollution category. Physics and chemistry factor in the Kuantan river  suitable to life the Gastropod. 
Co-Authors Heffy Utami Jabang Nurdin Mailastri Suarna Ramadhan Sumarmin