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Laura Flowrensia
Institut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Energy Environmental Science Social Sciences

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Correlation of Enzyme Inhibitor Activity in Sengon with Boktor Larval Growth on Artificial Diet Ulfah Juniarti Siregar; Noor Farikhah Haneda; Laura Flowrensia
Jurnal Silvikultur Tropika Vol. 2 No. 2 (2011): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.2.2.%p

Abstract

Sengon  (Paraserianthes falcataria  (L) Nielsen) is widely planted for reforestation programs, especially in establishment of community forest as its timber is utilized for constrction, package box, lighter as well as raw material of pulp and paper. However, there is main problem in sengon plantation, which is boktor (Xystrocera festiva Pascoe) pest attact. In the midgut of boktor larvae it was detected trypsin and α-amylase enzymes activity. Whereas on sengon tree it was reported contains inhibitory substance against trypsin and α-amylase enzymes of boktor larvae. The inhibitory activity was assumed as defense mechanism of sengon tree against the pest attack. In order to clarify the assumption an investigation on the correlation between trypsin and α-amylase inhibitor of sengon with larval growth on an artificial diet is necessary. The experiments aimed at obtaining correlations between the activities of trypsin and α-amylase inhibitors of sengon tree with the growth of boktor larvae, with small (±1,5 cm) and big sizes (±3 cm) on an artificial diet containing respective sengon tree materials.
STRUCTURE POPULATION OF PINE WOOLLY ADELGIDS (Hemiptera : Adelgidae) IN PERUM PERHUTANI UNIT III, WEST JAVA AND BANTEN, KPH SUMEDANG Noor Farikhah Haneda; Stevano J S Iriando; Laura Flowrensia
Jurnal Silvikultur Tropika Vol. 7 No. 3 (2016): Jurnal Silvikultur Tropika (Suplemen Desember)
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.7.3.S36-S38

Abstract

Pinus boerneri as Pine Woolly Adelgids, emergence rapidly around Pinus Plantation in Indonesia has been reported since last decade. This pest causing dieback, defoliated branches, and even death to the tree. The aim of this study to investigate the population structure of pine wooly adelgid attack in Pine forest (Pinus merkusii) in Perum Perhutani Unit III, West Java and Banten, KPH Sumedang. This research important as consideration about the distribution of pine wooly adelgid stages in presumtive level of consequential damage. There were three part of Pine twigs (crown, middle, and lower) from 18 trees that positively attacked being collected. Later on, twigs diameter and number of each pine woolly adelgids stages (egg, nymph and imago) from every twigs part been observed. Result shows that imago as the dominant stage that infested in Pine forest in Perum Perhutani Unit III, KPH Sumedang. Damage level that effect by P. boerneri devided into two categories light infested and heavy infested.Key words : Hemiptera, Pine Woolly Adelgid, P. boerneri, Pest, P. merkusii
Co-Authors Noor Farikhah Haneda Stevano J S Iriando Ulfah Juniarti Siregar