Volume 29 No. 2 July – December 2007

Sarwshri Gangurde1 , Konrad Marin1 and Maria Juliet C. Ceniza2 ABSTRACT The cultivation of tropical Asian rice, which may have originated 9,000 years ago, created an agricultural ecosystem of unrivalled ecological complexity. A complex arthropod community is inhabiting in the rice ecosystem, including pest and beneficial species. Concerning beneficials, the spiders are among the very …

Abundance and prey spectrum of web spiders in rice agroecosystems of Pangasugan, Leyte, Philippines Read More »

Tanumi Kumar and Monoranjan Ghose ABSTRACT Soil samples from twenty seven sites of Indian Sundarbans were analysed for some chemical parameters. These sited were divided into three inundation types namely, diurnal, usual springtide and summer springtide. The study demonstrated that most of the soil properties significantly varied with inundation type. Sites inundated by usual springtides …

Research Note: Effect of tidal inundation on some chemical properties of soil of the Sundarbans (India) Read More »

Daniel Leslie S. Tan1 , Gener G. Sebial2 and Felix J. Amestoso3 ABSTRACT This study determined the optimum effects of temperature, drum rotation and loading rate on the drying rate of cassava grates using the rotary drum dryer in removing moisture from cassava grates. A Central Composite Design was employed to evaluate a total of …

Optimization of the factors affecting the drying rate of cassava grates in a rotary drum dryer Read More »

Mary Ann Jully B. Regis1 and Misael T. Diputado, Jr.2 ABSTRACT Under waterlogged conditions, the non-grafted tomato plants has significantly lower survival rate (53%) compared to the grafted plants (100% survival rate). Under waterlogged conditions both the grafted and non-grafted plants had high leaf stomatal resistance, low transpiration rate and high stress rating, compared to …

Influence of waterlogging stress and benzyladenine application on tomato grafted to eggplant Read More »

Brian S. Sinangote1, Reny G. Gerona1, Ma. Dinah M. Reformina1, Ma. Gina M. Babb2 and Lucia M. Borines1 ABSTRACT A limiting factor to hybrid rice production in the Philippines is the susceptibility of hybrid rice component lines to diseases and insect pests. Rice black bug (Scotinophara coarctata Fabr.) is among the insect pests and is …

Reaction of hybrid rice and component lines to rice black [Scotinophara coarctata (Fabricius), Hemiptera: Pentatomidae] Read More »

Tessie C. Nuñez ABSTRACT Using a suitable medium for specific plant genotype greatly improves the efficiency of the in vitro culture method. The Visayas State University (VSU)-based National Coconut Research Center-Visayas (NCRC-V) evaluated the comparative suitability of the COGENT medium and VSU-modified Y3 (mY3) as in vitro culture media for coconut embryos using Albuera Dwarf …

Comparative suitability of two culture media to the in vitro growth of embryos of three coconut types Read More »

Julie D. Tan1, Edmundo L. Sanchez, Jr.1, Michiko Tanaka2, Taiki Katayama2, Kozo Asano2 and Fusao Tomita2 ABSTRACT This study was an attempt to isolate endophytic microorganism with antimicrobial properties from sweetpotato that are grown in the Philippines. Endophytic microorganisms were isolated from surface-sterilized stem cuttings of selected Philippine sweetpotato varieties such as BSP-SP-17, BSP-SP-22, and …

Screening of endophytic microorganisms from sweetpotato for the production of antimicrobial compounds Read More »

Justino M. Quimio and Nelson L. Quilario ABSTRACT The study was conducted in a logged-over forest of Tampakan Highlands that has an elevation of about 1,350 m. It was aimed to assess the timber stocking rate and level of floristic diversity of the forests that may be influenced by future mining operation in the area. …

Species and structure of forests in Tampakan Highlands, South Cotabato, Philippines Read More »

Arvin C. Balala1 and Jose M. Oclarit2 ABSTRACT Heavy metal-resistant marine bacteria were isolated from the sediments of Iligan Bay near the effluents outlets of certain factories. Isolation was done using marine agar fortified with corresponding different heavy metal concentrations. Isolates were grouped using their morphological and colonial growth characteristics. Among the purified isolates (61), …

Toxic heavy metal biosorption by some marine bacteria isolated from the sediments of industrial effluents of Iligan Bay Read More »

Wasantha S. Weliange1, Jimmy Pogosa2, Chandima Lankaadikara11, Maria Leichtfried3 and Friedhelm Göltenboth4 ABSTRACT Very little research has yet been done on fresh water fishes in the Philippines. The paper presents the description and key for the identification of 21 fresh water fish species occurring in Tubod River (18 species) and its outlet Inawasan River (1 …

Guide to the fresh water fishes in Tubod River, Lake Dnao and Inawasan River in Leyte, Philippines Read More »